diskdrives in general ref The disk drive created a new level in the Computer data storage ... data storage Tertiary storage tape drives . ref The IBM 350 RAMAC Disk File, ASME Award, Feb 27, 1984. ref The commercial usage of Hard disk drive hard diskdrives began in 1956 with the shipment of an IBM ... ref Compared to modern diskdrives, early hard diskdrives were large, sensitive and cumbersome devices ... high current or a three phase power supply due to the large motors they used. Hard diskdrives ... of about 1 GB. ref 1996 Disk Trend Report Rigid DiskDrives, Figure 2 Unit Shipment Summary ref As of July 2010, desktop hard diskdrives typically have a capacity of 500 to 1000 gigabyte s, while the largest capacity drives are 3 terabyte s. 1950s 1970s main early IBM disk storage File IBM ... Computer Products introduced its 4000 series diskdrives. These massive units stood convert 52 in m ... load heads with lubricated media. All modern diskdrives now use this technology and or derivatives ... Corporation introduced the first of its series of Storage Module Device SMD diskdrives using conventional ... market into the 1980s. 1980s, the PC era As the 1980s began, hard diskdrives were a rare and very expensive additional feature on personal computers PCs however by the late 80s, hard diskdrives were standard on all but the cheapest PC. Most hard diskdrives in the early 1980s were sold to PC end users ... internal hard diskdrives proliferated on personal computers. External hard diskdrives remained ... diskdrives being manufactured in a factory in Wuxi , China See also List of defunct hard disk manufacturers ... the worldwide market, previously having manufactured Comport diskdrives for the Korean market. ref 1989 Disk Trend Report Rigid DiskDrives , October 1989 ref 1989 Seagate Technology purchases Control ... Of Hard DiskDrives Category History of computing hardware History of hard diskdrives Category Hard diskdrives History of hard diskdrives ja ... more details
Infobox short story See Wikipedia WikiProject Novels or Wikipedia WikiProject Books name The Disk title orig El Disco translator author Jorge Luis Borges country Argentina language Spanish language Spanish series genre Fantasy , short story published in The Book of Sand book The Book of Sand publisher media type Print pub date 1975 english pub date 1977 preceded by followed by The Disk is a 1975 in literature 1975 short story written by Argentina Argentinian writer Jorge Luis Borges . It appears in the collection The Book of Sand book The Book of Sand . Synopsis The story deals with a woodcutter who lives in the midst of a deep wood in old England and who has never seen the sea. He tells the reader that at one time a man,who asks lodging from him appears at his door. The woodcutter notes that the man was elderly, as he referred to England as Saxony , which, at the time,was a sign of age. The day after the man wishes to leave, but before he does,he says that he is a King and is descended from Odin . He tells the woodcutter that he is exiled, but that he shall always be a king, because he holds the Disk of Odin, the sole thing in the world that has but one side. He opens his hand and shows the disk the woodcutter sees only an empty palm, but thereafter touches it, feeling a chill in the fingers and seeing a flash. He makes a false claim that he has a full chest of gold and wants to trade it for the disk, because he knows the man will decline. And the man does, to which the woodcutter replies that the man may go. When he turns around, the woodcutter kills the man with an axe. He then drags the body and throws it into the river. He then comes back and searches for the disk, which he never finds. See also portal Novels Bibliography of Jorge Luis Borges DEFAULTSORT Disk, The Category 1975 short stories Category Short stories by Jorge Luis Borges story stub es El disco ... more details
Notability Products date October 2009 Refimprove date November 2009 The term disk to disk , or D2D , generally refers to disk to disk backup. With D2D, a computer hard disk is backed up to another hard disk rather than to a tape or floppy. D2D is often confused with virtual tape , but differs in that it enables multiple backup and recovery operations to simultaneously access the disk directly by using a true file system. ref citebook title Backup and recovery first W. Curtis last Preston edition 2 publisher O Reilly Media year 2006 ISBN 0596102461 pages 219 ref Typical advantages of disk to disk Higher speed and higher capacity, relative to tape or floppy, resulting in shorter backup and recovery windows. Non linear recovery of data, enabling a specific file to be restored quicker and simpler than with tape. Lower total cost of ownership due to increased automation and lower hardware costs. Citation needed date August 2008 Remote backup services Remote backup service s are closely related to D2D backup as they are most often stored remotely on disk. The only major difference is that the data tends to be held at a remote location and these services are often provided by List of backup software Managed backup providers . References refs compu storage stub Category Computer backup Category Disk cloning ... more details
Refimprove date February 2011 Three Drives , also known as Three Drives on a Vinyl , is a Netherlands Dutch progressive trance duo. Career The duo is made up of Erik De Koning a.k.a. Enrico and Ton van Empel a.k.a. Ton T.B. . ref name British Hit Singles & Albums cite book first David last Roberts year 2006 title British Hit Singles & Albums edition 19th publisher Guinness World Records Limited location London isbn 1 904994 10 5 page 558 ref Their best known tracks are Greece 2000 originally released in 1997 by Massive Drive Recordings, with more mainstream releases on ZYX Music and Hooj Choons and Sunset on Ibiza . Badly labelled track listings on certain compilation album s, have resulted in some confusion over whether the true name of this artist is Three Drives Three Drives on a Vinyl or Greece 2000 . In 1999, they released an album named 2000 , with several tracks with a 2000 theme. Their correct name was originally 3 Drives on A Vinyl, in reference to the ability of the two band members to run three turntables at once. Confusion in the band s use of the adjectival A incorrectly taken to be the indefinite article a has caused the name to sound meaningless when represented as 3 Drives on a Vinyl . Therefore, early production company track listing staff, were naturally inclined to resort to the understandable Greece 2000 when listing the artist s name, and to assume that it was simply the track name that was odd and despite the clear reference of Greece 2000 to a notion of place and time that influenced the recording . The use of the number 3 rather than the full word is less certain, but its visual echo of the special use of the letter A later in the name is convincingly attractive. Ongoing confusion may have led the band to a pragmatic decision to now market themselves as Three Drives . Citation needed date February 2011 Discography Singles Three Drives Three Drives ... band stub electronic band stub de Three Drives ... more details
Other uses Midnight Drive disambiguation Midnight Drive Infobox film name The Midnight Drives image director Mark Jenkin producer Pippa Cross writer Mark Jenkin starring Colin Holt br Alex Reid actress Alex Reid br Mary Woodvine br John Woodvine music Alcatraz Swim Team cinematography Steve Tanner editing Mark Jenkin country UK language English budget 50,000 The Midnight Drives is a 2007 British comedy drama comedy drama film written and directed by Mark Jenkin and revolves around a divorcee who takes his bored children on a series of mystical, dream like excursions through the Cornish country side after initially failing to connect with them. Cast Colin Holt as Andy Stafford Alex Reid actress Alex Reid as Sophie Mary Woodvine as Cafe Owner John Woodvine as Guesthouse owner Sam Mills as Casey Stafford Megan Robertson as Gabrielle Stafford Production The film was made by independent film company O Region and had Pippa Best on board as producer. It was filmed at various locations around Cornwall including Land s End , Marazion and Penzance . Release The Midnight Drives film premiere premiered in the UK at the Cornwall Film Festival in October 2007 to a packed house and was subsequently selected for the London Film Festival London Film Focus and Ecran Britanniques festivals as well as the Celtic Media Festival Celtic Media . Critical Reception Derek Malcolm , film critic for The Evening Standard commented on it as A moving film about parentage with an exceptional performance from Colin Holt at its centre . ref http www.thisiscornwall.co.uk news Nighttime screening Midnight Drives article 280167 detail article.html ref References Reflist External links imdb title 0984069 DEFAULTSORT Midnight Drives Category 2008 films Category 2000s comedy films Category English language films Category Comedy drama films Category Road movies ... more details
Infobox Album See Wikipedia WikiProject Albums Name The Devil Drives Type studio Longtype Artist Dave Graney n The Coral Snakes Cover DG Devil Drives.jpg Released May 1997 Recorded August 1996 br Kiss Studios, Melbourne Genre Rock music Rock Length Label Mercury Records Producer Dave Graney , Clare Moore , David Ruffy Reviews Last album The Soft n Sexy Sound br 1995 This album The Devil Drives br 1997 Next album The Baddest br 1999 The Devil Drives is the sixth album by Dave Graney n The Coral Snakes. It was released in May 1997 on Mercury Records. ref name McF Cite encyclopedia last1 McFarlane first1 Ian authorlink1 Ian McFarlane encyclopedia Encyclopedia of Australian Rock and Pop title Encyclopedia entry for Dave Graney n the Coral Snakes url http web.archive.org web 20040604055129 www.whammo.com.au encyclopedia.asp?articleid 853 accessdate 30 December 2010 origyear 1999 year 2004 publisher Allen & Unwin location St Leonards, New South Wales St Leonards, NSW isbn 1865080721 Note On line version updated from 1999 book. ref The album peaked at No. 18 on the Australian Recording Industry Association ARIA ARIA Charts Album Charts . ref name AusCharts Cite web url http australian charts.com showinterpret.asp?interpret Dave Graney title Discography Dave Graney publisher Hung Medien work Australian charts portal accessdate 10 January 2011 ref It was also produced by Dave Graney , Clare Moore and David Ruffy. ref name ARDb Cite web url http hem.passagen.se honga database g graneydave.html work Australian Rock Database title Dave Graney publisher Magnus Holmgren last1 Holmgren first1 Magnus accessdate 30 December 2010 ref The album was recorded in August 1996 in Kiss Studios ... name Lewis Cite web url Allmusic class album id the devil drives r509092 pure url yes title Night of the Wolverine ... Biker in Business Class 4 29 A Man on the Make 4 11 Pascal et Caroline 6 41 The Devil Drives 3 59 Feelin ... Rouge, London Mixing Artwork Cover art Tony Mahony References Reflist DEFAULTSORT The Devil Drives ... more details
A list of all Apple internal and external drives in chronological order of introduction. Floppy DiskDrivesDisk II Disk II Disk III Apple FileWare Apple Twiggy FileWare Disk IIc Macintosh External Disk Drive 400K 400K Drive internal Macintosh External Disk Drive 400K Macintosh External Disk Drive 400K Disk II UniDisk 5.25 Disk II DuoDisk 5.25 Macintosh External Disk Drive Apple UniDisk 3.5 UniDisk 3.5 Macintosh External Disk Drive 800K Macintosh 800K External Drive Disk II Disk 5.25 Macintosh External Disk Drive Apple 3.5 Drive Apple 3.5 Drive Superdrive Apple SuperDrive Hard DiskDrives ProFile Apple Widget Hard Disk 20 Macintosh Hard Disk 20 Hard Disk 20SC Apple Hard Disk 20SC Time Capsule Apple Time Capsule Optical Drives AppleCD PowerCD SuperDrive CD and DVD drive SuperDrive MacBook Air Apple MacBook Air SuperDrive Tape Drives Apple Tape Backup 40SC Category Apple Inc. peripherals Category Macintosh peripherals Category Apple II peripherals Category Apple Inc. hardware Category Lists of computer hardware Apple drives ... more details
of editing and searching in hard disk and logical drives. http www.winhex.com WinHex forensic ...A disk editor is a computer program that allows its user to read, edit, and write raw data at ASCII character or hexadecimal , byte byte levels on diskdrives e.g., hard disk s, USB flash disk s or removable media such as a floppy disk s as such, they are sometimes called sector editors, since the read write routines built into the electronics of most diskdrives require to read write data in chunks of disk sector sector s usually 512 bytes . Many disk editors can also be used to edit the contents of a running computer s computer memory memory or a disk image . Unlike hex editors, which are used to edit Computer file files , a disk editor allows access to the underlying disk structures, such as the master ... directories . Programmers can use disk editors to understand these structures and test whether ... disk editors include special functions which enable more comfortable ways to edit and fix file systems or other disk specific data structures. Furthermore some include simple file browsers that can present the disk contents for partially corrupted file systems or file systems unknown to the operating system. These features can be used for example for file recovery. History Disk editors for home ... resets, instead of having to be re loaded on the same disk drive that later would hold the floppy to be edited the majority of home computer users possessed only one floppy disk drive at that time . Having the disk editor on cartridge also helped the user avoid editing damaging the disk editor application disk by mistake. List of some disk editors or products containing them External links ... disk editor and RAM editor for Win9x NT and up. http wxhexeditor.sf.net wxHexEditor designed for huge files disks. Tested up to 1 PetaByte drives. It s Open source and Cross platform . http www.roadkil.net ... may need cleanup http apps.tempel.org iBored iBored cross platform block oriented disk and file ... more details
unreferenced date May 2010 The disk controller or hard disk controller is the Electronic circuit circuit which allows the Central processing unit CPU to communicate with a hard disk , floppy disk or other kind of disk drive . Early disk controllers were identified by their storage methods and data encoding. They were typically implemented on a separate controller card. Modified frequency modulation MFM controllers were the most common type in small computers, used for both floppy disk and hard diskdrives. Run length limited RLL controllers used data compression to increase storage capacity by about 50 . Priam created a proprietary storage algorithm that could double the disk storage. Shugart Associates Systems Interface Shugart Associates System Interface SASI was a predecessor to SCSI . Modern disk controllers are integrated into the disk drive. For example, disks called SCSI disks have built in SCSI controllers. In the past, before most SCSI controller functionality was implemented in a single chip, separate SCSI controllers interfaced disks to the SCSI bus. The most common types of interfaces provided nowadays by disk controllers are Parallel ATA PATA IDE and Serial ATA for home use. High end disks use SCSI , Fibre Channel or Serial Attached SCSI . Disk controller versus host adapter The correct term for the components that allows a computer to talk to a peripheral bus is host adapter or host bus adapter HBA . On the other hand, a disk controller allows a disk to talk to the same bus. Those two are often confused, especially in the Advanced Technology Attachment PC world . In fact signals read by a disk read and write head are converted by a disk controller, then transmitted over the peripheral bus, then converted again by the host adapter into the suitable format for the motherboard ... a host adapter and a disk controller a disk array controller that allows RAID Hardware RAID hardware ... different functions. See also Disk array controller Forensic disk controller Controller computing ... more details
Unreferenced date December 2009 A logical disk is a device that provides an area of usable storage capacity on one or more physical disk drive components in a computer system. Other terms that are used to mean the same thing are disk partition partition , logical volume , and in some cases a virtual disk vdisk . The disk is described as logical because it does not actually exist as a single physical entity in its own right. There are many ways to define a logical disk or volume. Most modern operating systems provide some form of logical volume management which allows the creation and management of logical volumes. Logical disks are also defined at various levels in the storage infrastructure stack . From top to bottom Operating System Defines partitions on the disks to which it has visibility these disks may be logical themselves SAN If the SAN is virtualized, a device in the same presents logical disks vdisk to the host operating systems Storage Subsystem Usually providing some form of RAID where logical disks partitons are presented to the SAN from the RAID arrays themselves. The RAID arrays actually contain the physical disks. Why do we need them? When IBM first released the magnetic disk drive in the 1956 IBM 305 a single drive would be directly attached to the using system, with each disk managed as a single entity. As the development of drives continued, it became apparent ... one physical disks are RAID ed together to produce a single logical disk . In a modern home Personal computer PC environment, diskdrives now provide hundreds of gigabytes of storage capacity which can be impractical to use as a single entity. Therefore most systems have their drives partitioned into multiple logical drives Citation needed date November 2007 . In most modern business Information ... Logical Disk Category Computer storage Category Storage virtualization pl Partycja logiczna simple Logical disk ... more details
diskdrives Category Legacy hardware ...unreferenced date October 2007 A flippy disk sometimes known as a flippy is a Double sided disk double sided 5 floppy disk , specially modified so that the two sides can be used independently but not simultaneously in single sided drives. Use of flippy disks was most common during the 8 bit home computer era of the early to mid 1980s. Generally, there were two levels of modifications For Disk Operating System s that did not use the Hard sectoring index hole in the disk to mark the beginnings of tracks, the flippy modification required only a new write enable notch to be cut. For this purpose, specially designed single square hole hole punchers, commonly known as disk doublers , were produced and sold by third party computer accessory manufacturers. Many users, however, made do with a standard round hole puncher and or an ordinary pair of scissors for this job. For disk operating systems that did use index sync, a second index hole window had to be punched in both sides of the jacket, and for hard ... to the disk within. A number of floppy disk manufacturers produced ready made flippy media. As the cost of media went down, and double sided drives became the standard, flippies became obsolete. Special ... sensors so that the disk could be flipped over without the necessary index hole punch. Data written with these rare drives complicates conversions today for retrocomputing archivists due to the sector .... Two versions on one disk During the time of single sided floppy disks some software manufacturers would use the two sides of one floppy disk to store two different copies of the same program. Each ... II family Apple II or an Atari 8 bit family Atari 8 bit version on the other side of the disk. These releases were short lived however. When double sided floppy drives became common on gaming platforms ... placed on the flip side of the disk. If one put the disk into the drive upside down, the game played ... more details
Image Disk II.jpg thumb right Disk II drives. The Disk II Floppy Disk Subsystem was a 5 inch Floppy disk floppy disk drive designed by Steve Wozniak and manufactured by Apple Computer . It was first introduced in 1978 at a retail price of US 495 for pre order it was later sold for 595 including the Disk controller controller card and cable. The Disk II was designed specifically for use with the Apple ... The New York Times date 1997 09 01 ref The first Disk II drives A2M0003 sold were built using parts from Shugart Associates Shugart Drives , but to reduce costs Apple switched to Alps Electric Co. of Japan ... II users quickly devised a way to adapt their existing and cheaper Disk II drives, however only one ... of 4 floppy diskdrives the Apple was the first Apple to contain a built in drive mechanism. The Apple ... it was a single half height Disk II mechanism inside an individual drive enclosure. All of these drives ... sold the Disk IIc for US 329, and other companies later sold similar drives for less. ref Baum ... Macintosh External Disk Drive Apple ProFile External hard disk List of Apple drives List of products ... II peripherals Category Apple II family Category Floppy diskdrives de Disk II ru Disk II ... offer a disk drive for the Apple II, which used data cassette storage like other micromputers ... about thirty drives a day. ref A.P.P.L.E. Co op Celebrates A Decade of Service , Call A.P.P.L.E. ..., Apple Computer, Inc., Fall 1990 9 16. ref Normal storage capacity per disk side was 113.75kiB with DOS ... to manually flip the disk to utilize the opposite side after cutting a second notch on the diskette ... with Apple s later connector standard . Up to 12 drives could be attached to the Apple, using 6 interface cards 2 per card . A Bell & Howell version of the Disk II was also manufactured by Apple ... which Apple was already manufacturing. Disk III In 1978, Apple intended to develop its own Apple FileWare ... twiggy.html Apple and the Floppy Drive dead link date August 2010 ref The first variation of the Disk ... more details
Image DOM.JPG thumb right 250px Disk on module A disk on module DOM is a Solid state drive flash drive with either 40 44 pins Parallel ATA IDE Standard ATA Interface USB or SATA Interface to be used as a computer hard disk drive HDD . The flash to IDE converter simulates a harddisk, and therefore the modules can be used without additional software or drivers. They are used particularly within embedded computing systems where they can often be deployed in to very harsh environments where mechanical hard diskdrives would simply fail , or in a thin client because of small size, low power consumption and silent operation. DOMs are losing their market to integrated on motherboard CompactFlash CF to IDE converters that provide hard disk drive simulation for the widely supported CF standard. DOMs are highly reliable as they do not have any moving parts like regular hard disks and are small in size and light in weight. However, after a disk crash in traditional hard disk, some data may still be recoverable by scanning the physical media using specialized equipment, but there is no known method to recover lost data from a physically damaged DOM. Citation needed date July 2010 Currently storage capacities range from 32MB to 32GB with various form factor including vertical or horizontal orientation. The DOM works the same way as a solid state drive , but it is generally plugged directly to the motherboard. External links History http www.storagesearch.com ssd.html STORAGEsearch.com http www.soarland.com CF Card Adapter catalog 41.html CF to 40 Pin 44 Pin SATA ZIF Adapter DEFAULTSORT Disk On Module Category Solid state computer storage media Compu hardware stub de Disk on Module fr Disk On Module it Disk on module nl Disk on module ru Disk on Module ... more details
State Drives date 2009 05 05 ref See also Page cache Hard disk References reflist Category Computer ... with disc buffer. In computer storage , disk buffer often ambiguously Fact date September 2007 called disk cache or cache buffer Fact date September 2007 is the embedded memory in a hard drive acting as a buffer computer science buffer between the rest of the computer and the physical hard disk platter ... a small amount of memory, used to store the bits going to and coming from the disk platter. The disk ... system in the computer s main memory . The disk buffer is controlled by the microcontroller in the hard disk drive , and the page cache is controlled by the computer to which that disk is attached. The disk buffer is usually quite small, from 2 to 32 Mebibyte MiB , and the page cache is generally ... in the disk buffer is rarely reused. Fact date September 2007 In this sense, the terms disk cache and cache buffer are misnomers the embedded controller s memory is more appropriately called the disk buffer. Fact date September 2007 Note that disk array controller s, as opposed to disk controller ... a read from the disk, the disk arm moves the Disk read and write head read write head to or near ..., the first sectors to be read are not the ones that have been requested by the operating system. The disk s embedded computer typically saves these unrequested sectors in the disk buffer, in case the operating system requests them later. Speed matching The speed of the disk s I O interface to the computer almost never matches the speed at which the bits are transferred to and from the hard disk platter . The disk buffer is used so that both the I O interface and the disk read write head can operate at full speed. Write acceleration The disk s embedded microcontroller may signal the main computer that a disk write is complete immediately after receiving the write data, before the data are actually ... before the data are permanently fixed in the magnetic media, the data will be lost from the disk ... more details
F6 disk is a colloquial name for a floppy disk containing a Microsoft Windows NT device driver for a SCSI or RAID system. F6 disks are used by other NT based versions of Windows, including Windows 2000 , Windows Server 2003 , and Windows XP . On Windows Vista and Windows 7 , F6 disks are obsolete its setup process supports loading third party drivers from CD ROMs and USB drives. Usage An F6 disk is named after the manner in which it is used. During the installation process for Windows, the Setup program must load device drivers for the disk system on which Windows will be installed. Unless the disk system has been established on the market before the finalization of the particular Windows release, the drivers are not included on the Windows installation discs, and must be loaded by means of an F6 disk. An F6 disk is loaded in Windows setup by pressing the Function key F6 key immediately when Windows Setup starts. The message Press F6 if you need to install a third party SCSI or RAID driver... is briefly flashed on the screen every time Windows Setup starts. An F6 disk contains device drivers in its root directory . F6 disks are always floppy disks the device drivers loaded by Windows Setup at the point of the F6 prompt are unable to read any media other than floppies, with the exception of Windows Vista and 7, which adds USB flash memory support or fixed disk support for this situation. Device drivers for RAID and other disk controllers are often provided on CD ROM , but must be copied to a floppy F6 disk if they are to be used during Windows Setup. An alternate approach to this particular problem is slipstream computing slipstreaming of the required SATA SCSI SAS RAID EIDE drivers into the windows installation files directory e.g. i386 for the x86 variety by means of software like nLite , and create an ISO image that can be burned to CD or DVD media. References Microsoft support, http support.microsoft.com ?kbid 313348 KB313348 Category RAID Category Device drivers ... more details
In data storage device data storage , disk mirroring or RAID1 is the replication of logical disk volumes onto separate physical hard disk s in Real time computing real time to ensure continuous availability ... on the disk array controller or via server computing server software . It is typically a proprietary ... of a disk hardware failure a system can continue to process or quickly recover data. Mirroring may be done locally where it is specifically to cater for disk unreliability, or it may be done ... identical drives, though the process can be applied to logical drives where the underlying ... solutions such as disk array s or in software within the operating system. There are several scenarios for what happens when a disk fails. In a hot swap system, in the event of a disk failure, the system itself typically diagnoses a disk failure and signals a failure. Sophisticated systems may automatically activate a hot standby disk and use the remaining active disk to copy live data onto this disk. Alternatively, a new disk is installed and the data is copied to it. In less sophisticated systems, the system is operated on the remaining disk until such time as a spare disk can be installed ..., system performance is usually degraded as the disk system is fully occupied in copying data from one disk to the other. It is often misunderstood that mirroring of disks is a substitute for taking regular backups as it is incorrectly assumed that the only cause of data loss is disk failure. In fact ... to say It is differentiated from a disk snapshot snapshot in that there are no remaining links ..., disk mirroring can allow each disk to be accessed separately for reading purposes. Under certain circumstances ... disk can seek most quickly to the required data. This is especially significant where there are several tasks competing for data on the same disk, and thrashing where the switching between tasks takes ... configurations that frequently access the data on the disk. In some implementations, the mirrored disk ... more details
track. Due to technological advances almost all hard diskdrives since Compaq and Western Digital defined ... id 1066 Document LBA01 02 LBA Count for IDE Hard DiskDrives ref defines the standard disk sizes for IDE ...Unreferenced date June 2010 Disk storage or disc storage is a general category of storage mechanisms ... on a surface layer deposited of one or more planar, round and rotating platters. A disk drive is a device ... types are the hard disk drive which contain a non removable disc , the floppy disk floppy disk drive and its removable floppy disk , various optical disc drive s and optical disc associated media . CD s and DVD s are optical devices File SixHardDriveFormFactors.jpg thumb Six hard diskdrives File Floppy DiskDrives 8 5 3.jpg thumb Three floppy diskdrives File Asus CD ROM drive.jpg thumb A CD ROM optical disk drive Background Music al and sound reproduction audio information was originally recorded ... where the data is recorded in a digital format as optical information. The first commercial disk storage device, that is the first commercial digital disk storage device, was the IBM IBM 350 IBM 350 RAMAC 350 shipped in 1956 as a part of the RAMAC IBM 305 RAMAC computing system. Disk storage is now ... innovation in disk storage technology, coupled with less vigorous innovation in tape storage, has reduced the density and cost per bit gap between disk and tape, reducing the importance of tape as a complement to disk. Today disk storage devices typically have a single head that moves across a disk ... Samsung HD753LJ 01 Top.jpg center A typical hard disk drive center Image Samsung HD753LJ 02 Bottom.jpg ... cover removed center Image Hard disk platters and head.jpg center Disks 2 and actuator arms 4 center Image Samsung HD753LJ 05 Head.jpg center The head and disk center Image Hard disk head.jpg center Head on the disk platter center gallery Too HDD specific, putting better images in intro Diskdrives are Computer data storage block storage devices . Each disk is divided into logical Block data storage ... more details
to how a single physical hard drive can be disk partitioning partitioned into multiple virtual drives. The compressed drive is accessed via a device driver . Compressing existing drives All drives ...A disk compression utility software software utility increases the amount of information that can be stored on a hard disk drive of given size. Unlike a file compression utility which compresses only specified files and which requires the user computing user designate the files to be compressed a disk ... information needs to be stored to the hard disk, the utility will data compression compress the information. When information needs to be read, the utility will decompress the information. A disk compression ... software application s access the hard disk using these routines, they continue to work after disk compression has been installed. Disk compression utilities were popular especially in the early 1990s, when microcomputer hard disks were still relatively small 20 to 80 megabyte s . Hard drives were also rather expensive at the time, costing roughly 10 USD per megabyte. For the users who bought disk ... more disk space as opposed to replacing their current drive with a larger one. A good disk compression utility could, on average, double the available space with negligible speed loss. Disk compression ... to increased capacities and lower prices. Note While the most familiar disk compression utilities ... , for example, worked on the Apple Macintosh platform. Common disk compression utilities Standalone ... from Salient Software Bundled utilities The idea of Bundling marketing bundling disk compression ... compressed drive like those above. How disk compression works Disk compression usually creates ... F. Processing continues from compressed drive. Performance Impacts On systems with slower hard drives, disk compression could actually increase system performance. This was accomplished two ways Once compressed, there was less data to be stored. Disk accesses would often be batched together for efficiency ... more details
RAM behave like a disk drive was much faster than the diskdrives especially in those days before hard drives were readily available on such machines. The Silicon Disk was launched in 1980, initially ...about virtual drives emulated with software hardware storage devices using RAM solid state drive filesystems without drive emulation tmpfs moreref date June 2009 A RAM disk or RAM drive is a block of Random ... were a disk drive secondary storage . It is sometimes referred to as a virtual RAM drive ... RAM, which is a type of solid state drive . Performance The performance of a RAM disk is in general ... disk drive hard drive , tape drive or optical disk drive optical drive . This performance gain ... , as well as others. File access time is greatly decreased since a RAM disk is solid state electronics ... ROM , DVD , and Blu ray must move a head or optical eye into position and tape drives must wind ... necessary. Second, the throughput maximum throughput of a RAM disk is limited by the speed of the RAM ... a web cache doing this on a RAM disk can also improve the speed of loading pages . ref http www.macosxhints.com article.php?story 20040827132909881 Using a RAM disk for browsing the web on Macs http www.ghacks.net 2007 12 14 use a ramdisk to increase firefox security Using a RAM disk to improve security in firefox ref In many cases, the data stored on the RAM disk is created, for faster access, from data permanently stored elsewhere, and is re created on the RAM disk when the system ... disk by way of a user space application process. ref http homepage.mac.com mavsftwre shareware02.html ... in the RAM disk, but an uninterruptible power supply can keep the entire system running during a power ... system specifities The first software RAM disk for microcomputers was invented and written by Jerry Karlin in the UK in 1979 80. The software, known as the Silicon Disk System was further ... II series and Commodore Business Machines Commodore computers, a RAM disk was also a popular application ... more details
Orphan date February 2009 Infinite Disk was a hierarchical storage management and backup utility backup utility for Microsoft Windows first published by Chili Pepper Software in 1992. ref http findarticles.com p articles mi m0SMG is n1 v14 ai 15027290 Infinite Disk 2.0 Product Announcement in Software Magazine ref The company and the software were acquired by Cheyenne Software in 1995 ref http findarticles.com p articles mi m0EIN is 1995 Sept 28 ai 17487149 pg 1 Business Wire, Sept 28, 1995 ref , which was in turn purchased by Computer Associates in 1996. ref http findarticles.com p articles mi m0EIN is ai 18738324 Business Wire, Oct 7, 1996 ref Infinite Disk, operating in the background, automatically data compression compresses less active files and eventually data migration migrates them to removable media, but the files remain visible in Windows folders and, when accessed, are fetched from the backup storage. A variant of Infinite Disk, Personal Archiver, was bundled with Iomega removable drives starting in November 1994. ref http findarticles.com p articles mi m0EIN is ai 15890201 Business Wire, Nov 4, 1994 ref Notes references Category 1994 software Category Windows software Category Backup software storage software stub ... more details
Disk cloning is the process of copying the contents of one computer hard disk to another disk or to an image file. Often, the contents of the first disk are written to an disk image image computer file file as an intermediate step, and the second disk is loaded with the contents of the image. This procedure is also useful when moving to a larger capacity disk or to restore the disk to a previous state. Uses There are a number of notable uses for disk cloning software. These include Reboot and restore a technique in which the disk of a computer is automatically wiped and restored from a clean , master ... manufacturers and larger companies. Hard drive upgrade An individual user may use disk copying cloning to upgrade to a new, usually larger, hard disk. Full system backup A user may create a comprehensive ... to disk cloning on the x86 platform specific details may not apply to other platforms. To provision the hard disk of a computer without using disk cloning software, the following steps are generally required for each computer Create one or more partition IBM PC partition s on the diskDisk formatting ... driver s for the particular hardware Install application software With disk cloning, this is simplified to Install the first computer, as above. Create an image of the hard disk optional Clone the first disk, or its image, to the remaining computers This can be referred to simply as a recovery disc. History Before Windows 95 , some computer manufacturers used hardware disk copying machines to copy software. This had the disadvantages of copying not just the used data on the disk, but also unused Disk sector sector s, as the hardware used was not aware of the structures on the disks. A larger hard disk could not be copied to a smaller one, and copying a smaller one to a larger left the remaining space on the new disk unused. The two disks required identical geometries. Other manufacturers ... simply to copy all files from one disk to another, because there are special booting boot files or boot ... more details
external hard drive in a disk enclosure Multiple drives RAID enabled enclosures and iSCSI enclosures ...Image Usb firewire hard disk enclosure.jpg thumb 300px right A 3.5 USB FireWire hard disk enclosure A disk enclosure is essentially a specialized chassis designed to hold and power disk drive s while providing ... provide power to the drives therein and convert the data sent across their native computer bus data ... and signal of a different standard. Factory assembled external hard disk drive s, external DVD ROM drives, and others are all built around disk enclosures. Bulkier models built around 2.5 and 3.5 hard drives and full height 5.25 DVD ROM drives use enclosures that are often nearly identical to Original ... to using external disk enclosures include Adding additional storage space and media types to small ... space for additional drives. ref cite web author 1 url http www.tomshardware.com reviews caldigit ... 2009 07 29 ref Adding more drives to any given server computing server or workstation than their chassis ... article 07 06 07 23TCthumper 2.html title Sun Fire X4500 server crams 48 drives into 4U & 124 Storage ... & 124 Review Three One Touch Backup Drives publisher Informationweek.com date 2005 10 18 accessdate ... to share data or provide a cheap off site backup solution. Preventing the heat from a disk drive ... magnetic hard drives or optical disc drive s inside USB , FireWire , or Serial ATA enclosures. External 3.5 floppy drive s are also fairly common, following a trend to not integrate floppy drives ... built external drives are available through all major manufacturers of hard drives, as well as several ..., within which a hard disk drive can be placed and connected with the same type of adapters as a conventional ... have integrated fans with which to keep the drives within at a cool temperature caddies for all major standards exist, supporting for example AT Attachment ATA , SCSI and S ATA drives and USB , SCSI ... media such as CDs, DVDs and USB flash drives, slower than drives connected using solely ATA ... more details
791D 1994, AT Attachment Interface for DiskDrives ATA 1 , section 7.1.2 ref drives, appear at their interface ... Digital s Advanced Format The 4K Sector Transition Begins ref The earliest diskdrives also had fixed block sizes e.g. http www 03.ibm.com ibm history exhibits storage storage 350.html IBM 350 disk ... thumb 200px Low level format of a 10 megabyte IBM PC XT hard drive. Hard diskdrives prior to the 1990s ... level formatting LLF of hard diskdrives was common for minicomputer and personal computer systems until the 1990s. IBM and other mainframe system vendors typically supplied their hard diskdrives or media ... do not handle low level functions for HDDs and optical diskdrives such as writing timing marks, and they cannot ...Image Formatting c drive.JPG thumb Formatting a hard drive using MS DOS Disk formatting is the process for preparing a hard disk drive or flexible disk for its use by an operating system OS , usually including the creation of a file system . For some operating systems, disk formatting may create multiple file systems on the same device by dividing the disk into sections, called Disk partitioning partitions , one for each file system. ref http www.partitionwizard.com help what is disk formatting.html What is disk formatting? ref A variety of application programs exist for disk formatting, pictured ... 03.ibm.com ibm history exhibits storage storage 1301.html title IBM 1301 disk storage unit author ... disk subsystems on the IBM System 360 expanded this concept in the form of Count Key Data CKD and later ... 3390 direct access storage device ref Floppy disk s generally only used fixed block sizes but these sizes were a function of the host s Operating System OS and its interaction with its Floppy disk controller ... sizes depending upon the host OS and controller. Optical disk s generally only use fixed block sizes. Disk formatting process Formatting a disk for use by an operating system and its applications involves ... and other information to be used later, in normal operations, by the disk controller to read or write ... more details
a slice of a pie. Thus, the disk sector Figure 1, item C refers to the intersection of a track and mathematical sector . In hard diskdrives, each physical sector is made up of three basic areas, the sector ... later, Specify date March 2011 hard diskdrives supporting 1,024 byte sectors began to be integrated ... and Toshiba began shipments of 1.8 inch hard diskdrives with 4096 byte sectors, the sector size designated as the next standard format for all hard drives. Usage of 4096 byte sectors in the computing segment started in 2008 with hard drives primarily intended for integration into external add on storage devices. The movement accelerated in 2010, when three of the five hard disk drive manufacturers, Seagate, Toshiba and Western Digital, began producing hard drives using the 4096, or 4K, sector ... transition to 4K as the new standard sector size for all applications using hard diskdrives. Under ...Image Disk structure2.svg thumb Figure 1. Disk structures br A Track br B Geometrical sector br C Track sector br D cluster file system Cluster In computer disk storage, a sector is a subdivision of a Track disk drive track on a magnetic disk or optical disc . Each sector stores a fixed amount of user ... or 2048 bytes for optical discs of user accessible data per sector. Newer hard drives use 4096 byte 4 KB or 4K Advanced Format sectors. Mathematically, the word sector means a portion of a disk ... disks was established with the inception of the hard disk drive in 1956. Through a coordinated effort organized by the industry trade organization, International Disk Drive Equipment and Materials ... between a radius and a track creates larger sectors towards the outside of the disk ..., where the disk is divided into zones encompassing a small number contiguous tracks. Each zone ... circles Advanced Format main Advanced Format Hard disk drive manufacturers identified the need ... disk drive manufacturers could increase the efficiency of the data surface area by five to thirteen ... more details
, such as CD ROM s or USB flash drives . Booting from a disk A modern PC is configured to attempt ...A boot disk is a removable digital data storage medium from which a computer can load and run booting boot an operating system or utility program. The computer must have a built in program which will load and execute a program from a boot disk meeting certain standards. Boot disks are used for Operating system installation. Data recovery . Data remanence Purging Data purging . Hardware or software ... in case of lost password is possible with an appropriate boot disk with some operating systems. Games .... Floppy disk s and CD ROM s are the most common forms of media used, but other media, such as magnetic or paper tape drives, zip drive s, and more recently USB flash drive s can be used. The computer ... medium, it is usual for the boot program to use some system RAM as a RAM disk for temporary computer ... if switched on with the disk in the drive. Boot floppies Bootable floppies for PCs usually contain MS DOS or miniature versions of Linux . The most commonly available floppy disk can hold only ... a selection may be made. Modern Apple computers will boot from an appropriate disk if the user presses ... boot disk contents. All boot discs must be compatible with the computer they are designed for. MS DOS PC DOS A valid boot sector on the floppy disk, not in the format of a normal disk Computer file ... boot sector on the disk COMMAND.COM KERNEL.SYS Linux A bootloader such as SYSLINUX or GRUB Linux kernel Initial ram disk initrd See also Live CD Boot sector Booting Darik s Boot and Nuke External links http www.boot land.net forums Boot Land Community forum dedicated to Boot Disk research HSW harvard extension schools computer science e 1 understand 2740 creating a boot disk video Creating a Boot Disk Category Booting ar da Bootdisk de Bootf higes Medium fr Disquette de d marrage ko id Boot disk it Disco di avvio ms Cakera but ja pt Disco de boot ... more details
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