Image M42proplyds.jpg thumb A proplyd in the Orion Nebula Image Protoplanetarydisk HH 30.jpg thumb The protoplanetarydisk Herbig Haro object HH 30 in Taurus constellation Taurus , about 450 light years away. The disk emits the reddish stellar jet , a common structure of these formations. Image Artist s Impression of a Baby Star Still Surrounded by a Protoplanetary Disc.jpg thumb An artist s impression of a protoplanetarydisk. Credit ESO L. Cal ada Image Mamajek09 diskfraction.jpg thumb Fraction of stars that show some evidence of having a protoplanetarydisk as a function of stellar age in millions ... last4 Ishii first4 Miki ref harv ref A protoplanetarydisk or proplyd is a rotating circumstellar disk of dense gas surrounding a young newly formed star, a T Tauri star , or Herbig Ae Be star . The protoplanetarydisk may be considered an accretion disc because gaseous material may be falling from the inner edge of the disk onto the surface of the star, but this process should not be confused with the accretion process thought to build up the planets themselves. Formation Protoplanetary disks ... after accretion has ended. The oldest protoplanetarydisk ever discovered is 25 million years ... , etc. are probably not truly protoplanetary , but represent a later stage of disk evolution ... div Category Circumstellar discs Protoplanetarydisk ar ca Disc protoplanetari cs Protoplanet rn ... in their size and temperature. Protoplanetary disks have radii up to 1000 astronomical unit s, and only ... much like forming a flat pizza out of dough&mdash and take the form of a disk. The initial collapse ... 2004 pages 496 510 doi 10.1086 422550 ref harv arxiv astro ph 0405271 ref before the disk disappears ... lived Accretion Disk around a Lithium depleted Binary T Tauri Star journal The Astrophysical Journal ... The solar nebula nebular hypothesis of solar system formation describes how protoplanetary disks are thought ... and ice grains in the disk to accrete into planetesimal s. This process competes against the stellar ... more details
employed when discussing the unrelated concept of protoplanetarydisk s. The name protoplanetary ...Image Egg Nebula.jpg thumb right 250px The Egg Nebula , a protoplanetary nebula in Cygnus constellation Cygnus A protoplanetary nebula or preplanetary nebula Harv Sahai S nchez Contreras Morris 2005 PPN is an astronomical object which is at the short lived episode during a star s rapid stellar evolution between the late asymptotic giant branch LAGB Ref label A a none phase and the subsequent planetary nebula PN phase. A PPN emits strongly in infrared radiation, and is a kind of reflection nebula . It is the penultimate high luminosity evolution phase in the life cycle of intermediate mass stars 1 8 solar mass M sub sub . Harv Kastner 2005 Naming File IRAS 13208 6020.tif thumb Protoplanetary nebula IRAS 13208 6020 is formed from material that is shed by a central star. The name protoplanetary .... Harv Davis Smith Gledhill Varricatt 2005 Protoplanetary nebula phase File IRAS 20068 4051.jpg thumb Protoplanetary nebula known as IRAS 20068 4051 taken by Hubble Space Telescope Hubble s Advanced Camera for Surveys. During the ensuing protoplanetary nebula phase, the central star s CS effective ... an accretion disk scenario, similar to the model used to explain jets from active galactic nuclei ... seen in many PPN jets. In such a model, the accretion disk forms through binary interactions. Magneto centrifugal launching from the disk surface is then a way to convert gravitational energy ... Near infrared echelle spectroscopy of protoplanetary nebulae probing the fast wind in H sub 2 sub ... last1 Kastner first1 J. H. title Near death Transformation Mass Ejection in Planetary Nebulae and Protoplanetary .... last2 Kwok first2 Sun author2 link Sun Kwok title Evolution of protoplanetary nebulae journal Astrophysical ... See also Bipolar nebula Bipolar outflow List of protoplanetary nebulae Planetary nebula Star DEFAULTSORT Protoplanetary Nebula Category Protoplanetary nebulae Category Nebulae Category Stellar evolution ... more details
Unreferenced date October 2011 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 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 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
Summary Artist s impression of a protoplanetarydisk Original at http www.nasa.gov multimedia imagegallery image feature 401.html Licensing PD USGov NASA Category Star images Copy to Wikimedia Commons bot Svenbot priority true ... more details
of angular momentum , which results in the formation of a gaseous protoplanetarydisk around the young, rotating star. The former is a rotating circumstellar disk of dense gas and dust that continues ...A circumstellar disk is a torus , pancake or ring shaped accumulation of matter composed of gas , dust , planetesimal s, asteroid s or collision fragments in orbit around a star . Around the youngest stars, they are the reservoirs of material out of which planets may form. Around mature stars, they indicate that planetesimal formation has taken place and around white dwarf s, they indicate that planetary material survived the whole of stellar evolution. Such a disk can manifest itself in various ways. Young star main Protoplanetarydisk According to the currently accepted model of star formation, sometimes referred to as the nebular hypothesis , a star is formed by the gravitational collapse ... of gas which is itself mainly hydrogen. The accretion disk phase lasts a few to 10 million years. Accretion rates are typically 10 sup 7 sup to 10 sup 9 sup solar masses per year but can vary. The disk gradually cools in what is known as the T tauri star stage. Within this disk, the formation of small dust grains made of rocks and ices can occur, and these can coagulate into planetesimal s. If the disk ... Circumprimary disk, is where a disk orbits the primary i.e. more massive star of the binary star system ... Disk Adaptive Optics Imaging of the Young Multiple System VW Chamaeleon , Brandeker, Alexis et al. 2001 ref Circumsecondary disk is one around the secondary i.e. less massive star of the binary star system. Circumbinary disk, is where a disk orbits both the primary and the secondary of the binary system. Dust Debris disk consists of planetesimals along with fine dust and small amounts ... kalas disksite index.html Circumstellar Disk Learning Site Category Circumstellar discs Category ... schijf ja pl Dysk protoplanetarny sk Protoplanet rny disk fi Protoplanetaarinen ... more details
the protoplanetarydisk phase. ref cite news title Spitzer Team Says Debris Disk Could Be Forming Infant ... disc Asteroid belt Protoplanetarydisk References reflist 2 External links Commons category Debris ...Image Fomalhaut with Disk Ring and extrasolar planet b.jpg thumb 300px Hubble Space Telescope observation of the debris ring around Fomalhaut . The inner edge of the disk may have been shaped by the orbit of Fomalhaut b, at lower right. A debris disk is a circumstellar disk of dust and debris in orbit ... debris disk in orbit around a neutron star . ref cite journal author Wang, Z. Chakrabarty, D. Kaplan, D. L. title A debris disk around an isolated young neutron star journal Nature year 2006 volume ... 2006 09 08 ref By 2001, over 900 candidate stars had been found to possess a debris disk ... been absorbed by the disk, then radiated away as infrared energy. ref cite web url http www.roe.ac.uk ukatc research topics dust identification.html title Debris Disk Database publisher Royal ... a debris disk was detected around the star Vega using the IRAS satellite. Initially this was believed to be a protoplanetarydisk , but it is now thought to be a debris disk due to the lack of gas in the disk and the age of the star. Subsequently irregularities have been found in the disk, which may ... planets, was reported to also have a debris disk, ref name 55 cancri cite news title University Of Arizona Scientists Are First To Discover Debris Disk Around Star Orbited By Planet publisher ScienceDaily ... in the debris disk around Epsilon Eridani suggest perturbations by a planetary body in orbit around ..., H. J. title Structure in the Epsilon Eridani Debris Disk journal The Astrophysical Journal volume ... during which it is surrounded by a disk shaped nebula. Out of this material are formed planetesimal ..., which forms a disk out of the resulting debris. At some point during their lifetime, about 45 of these stars are surrounded by a debris disk, which then can be detected by the thermal emission ... more details
Disk cache may refer to Disk buffer , the small amount of buffer memory present on a hard drive. Page cache , the cache of disk pages kept by the operating systems, stored in unused main memory. General application level cache caching of data stored on the disk. ReadyBoost , a non volatile disk cache stored on a flash memory device, in Windows Vista and Windows 7. disambig ko zh ... more details
In computing , a disk failure usually refers to the failure of a disc based storage device. These are usually either A floppy disk See buzz of death A hard disk See hard disk failure See also Fault tolerant system RAID Data redundancy Disaster recovery Data recovery Data loss Not to be confused with Spinal disc herniation Slipped disk a medical condition of a spine. disambig ... more details
Disk aggregation is the process of combining more than one logical or physical disk drive into a larger logical disk drive. This is done for various reasons creating a single logical disk with a capacity larger than any of the available physical disks providing a simple way to increase disk performance a simple way to implement LUN level storage virtualization See also RAID Storage Virtualization Sources Unreferenced date February 2007 compu storage stub Category Storage virtualization ... more details
Infobox software name Disk Utility logo Image Diskutil.png 64px screenshot Image Disk Utility screenshot.png 220px Disk Utility screenshot caption author developer Apple Inc. released latest release version ... website Disk Utility is the name of a Utility software utility created by Apple Inc. Apple for performing Disk storage disk related tasks in Mac OS X . These tasks include ref http docs.info.apple.com article.html?path DiskUtility 10.5 en duh1008.html Disk Utility 10.5 Help Testing and repairing a disk or volume ref the creation, conversion, compression and encryption of disk image s from a wide range of formats read by Disk Utility to .dmg or for CD DVD images .cdr, which is identical to the .iso ... disks including both hard disk s, removable media and disk images enabling or disabling Journaling file system journaling verifying a disk s Data corruption integrity , and repairing it if the disk is damaged ... kb HT1452 About Disk Utility s Repair Disk Permissions feature ref disk erasing, disk formatting formatting , disk partitioning partitioning ref http support.apple.com kb HT2374 Mac OS X 10.5 About resizing disk partitions ref and disk cloning cloning secure deletion of free space or disk using ... sets in Disk Utility ref , and repairing RAID sets restoring volumes from Apple Software Restore ASR images Optical disc authoring burning disk images to CD ROM CD or DVD in HFS Plus HFS format ref http support.apple.com kb HT2087 Burning a disk image file on a CD or DVD in Mac OS X ref erasing CD ... status of a hard disk. Disk Utility functions may also be accessed from the Mac OS X Command line interface command line with the code diskutil code and code hdiutil code commands. Disk Utility was updated with Mac OS X v10.3 . Prior to v10.3, the functionality of Disk Utility was spread across two applications Disk Copy and Disk Utility. Disk Copy was used for creating and mounting disk image files, and Disk Utility was used for formatting, partitioning, verifying and repairing file structures ... more details
Image Nashua diskpack.jpg thumb Disk pack manufactured by Nashua, USA, without its protective cover. A 3.5 modern hard drive is shown for comparison. A Disk pack is a layered grouping of hard disk platter s circular, rigid discs coated with a magnetic data storage device data storage surface . A disk pack is the core component of a hard disk drive. In modern hard disks, the disk pack is permanently sealed inside the drive. In many early hard disks, the disk pack was a removable unit, and would be supplied with a protective canister featuring a lifting handle. The protective cover consisted of two parts, a clear plastic shell, with a handle in the center, that enclosed the top and sides of the disks and a separate bottom that completed the sealed package. To remove the disk pack, the drive would ... shell inserted and twisted to unlock the disk platter from the drive and secure it to the top shell. The assembly would then be lifted out and the bottom cover attached. A different disk pack could then be inserted by removing the bottom and placing the disk pack with its top shell into the drive. Turning the handle would lock the disk pack in place and free the top shell for removal. The first removable disk pack was invented in 1965 by two IBM engineers, Thomas G. Leary and R. E. Pattison. Examples of a hard disks with removable disk packs are the IBM magnetic disk drives IBM 1311 IBM 1311 ... selects a disk pack File Fotothek df n 10 0000118.jpg Bottom cover is removed File Fotothek df n 10 0000119.jpg Disk pack is ready for insertion File IBM2314DiskDrivesAndIBM2540CardReaderPunch.jpg IBM 2314 s with removable disk packs and empty covers on top gallery References http www 03.ibm.com ... for Drum and Disk Records, U.S. Patent 3,206,214, 1965 R.E. Pattison, Portable Memory for Data Processing Machine, U.S. Patent 3,176,281, 1965 See also commonscat Removable disk packs disk cartridge , hard disk History history of hard disk DEFAULTSORT Disk Pack Category Rotating disc computer storage ... more details
Orphan date December 2010 Unreferenced date December 2009 Disk cartridge has several meanings related to computer storage . 1960s storage medium An early disk cartridge was a single hard disk platter encased in a protective plastic shell. When the removable cartridge was inserted into the cartridge drive peripheral device , the disk read and write head read write head s of the drive could access the magnetic data storage device data storage surface of the platter through holes in the shell. The disk cartridge was a direct evolution from the disk pack drive, or the early hard drive . As the computer storage density storage density improved, even a single platter would provide a useful amount of data storage space, with the benefit being easier to handle than a removable disk pack. An example of a cartridge drive is the IBM magnetic disk drives IBM 2310 IBM 2310 . Disk cartridges were made obsolete by floppy disk s. Expand section date June 2008 Modern storage medium Image Zip disc back.jpg thumb Zip disks are sometimes referred to as disk cartridges. Some more recent removable disk storage media are referred to as disk cartridges . This is most common with Zip drive Zip disk s. It is very rare, but not unheard of, to refer to the floppy disk 3 inch microfloppy as a disk cartridge. Protective casing Some types of optical disc s and magneto optical disc s were either permanently enclosed in a protective plastic sheath, or placed into a sheath before being inserted into the computer drive drive . This sheath was often called caddy , but sometimes also disk cartridge . See also Cartridge electronics Universal Media Disc DEFAULTSORT Disk Cartridge Category Rotating disc computer storage media ... more details
refimprove date March 2011 The Disk Fax was a machine that was used in combination with games for the Family Computer Disk System in Japan. One of the main features of the Disk System is the ability to save data, allowing players to save information such as high score s and other achievements on their game disk. Disk Fax machines could be found in certain stores in Japan during the late 80s early 90s. The Disk Fax machines read save data and send the scores to Nintendo for inclusion on a national scoreboard. Disk Fax machines were used by Nintendo to hold contests in Japan. References http www.atarihq.com tsr fds fds.html tsr s NES archive Family Computer Disk System Nintendo hardware NES Category Nintendo hardware Category Japan only video game hardware Nintendo stub ... more details
unreferenced date May 2010 The disk controller is the Electronic circuit circuit which enables 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 disk drives. 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 ..., and then read by the CPU . Sometimes there may be yet another controller between a host adapter and a disk controller a disk array controller that allows RAID Hardware RAID hardware RAID to be formed ... also Disk array controller Floppy disk controller Forensic disk controller Controller computing ... more details
An occulting disk is a small disk used in a telescope to block the view of a bright object in order to allow observation of a fainter one. The coronagraph , at its simplest, is an occulting disk in the focal plane of a telescope , or in front of the entrance aperture , that blocks out the image of the solar disk, so that the corona can be seen. Notes, References and Sources http www.daviddarling.info encyclopedia The Encyclopedia of Astrobiology, Astronomy, and Spaceflight astronomy stub Category Telescopes Category Optical devices de Kegelblende ... more details
Disk swapping refers to the practice of inserting and removing, or swapping, floppy disks in a floppy disk drive based computer system . In the early days of personal computer s, before hard drives became commonplace, most fully outfitted computer systems had 2 floppy drives addressed as A and B on CP M and MS DOS. Disk drives were expensive, however, and having two was seen as a luxury by many computer users who had to make to with a single drive. The purpose of 2 floppy drives was so that the disk containing the Application software application program could remain in the drive while the data disk containing the user s files could be accessed in the second drive. In order to use a function of the program not loaded into memory, the user would have to first remove the data disk, then insert the program disk. When the user then wanted to save their file, the reverse operation would have to be performed. On some less than user friendly systems, this could result in data loss when, for example, files were saved onto the program disk. Disk swapping was an infamous feature of early Macintosh 128k systems, which were extremely RAM starved. Category Floppy disk computer storage ... more details
other uses2 Disc Unreferenced date December 2009 File CIRCLE 1.svg thumb A disk is the region bounded by a circle . An open disk is the interior topology interior of the disk excluding the bounding circle, while a closed disk see closed set is the open disk together with the bounding circle. In geometry , a disk also Spelling of disc spelled disc is the region in a plane geometry plane bounded by a circle . A disk is said to be closed or open according to whether or not it contains the circle that constitutes its boundary. In Cartesian coordinates , the open disk of center math a, b math and radius R is given by the formula math D x, y in mathbb R 2 x a 2 y b 2 R 2 math while the closed disk of the same center and radius is given by math overline D x, y in mathbb R 2 x a 2 y b 2 le R 2 . math The area geometry area of a closed or open disk of radius R is R sup 2 sup see pi . The Ball mathematics ball is the disk generalised to metric spaces . In context, the term ball may be used instead of disk . In theoretical physics a disk is a rigid body which is capable of participating in collisions in a two dimensional gas . Usually the disk is considered rigid so that collisions are deemed elastic collision elastic . Geometry The Euclidean disk is Circular symmetry circular symmetrical . Topological notions The open disk and the closed disk are not homeomorphic, since the latter is compact ... also that of a closed or open disk is 1. Every continuous map from the closed disk to itself ... disk consider for example math f x,y left frac x sqrt 1 y 2 2 ,y right math which maps every point of the open unit disk to another point of the open unit disk slightly to the right of the given one. See also Unit disk , a disk with radius one Annulus mathematics Ball mathematics , the usual term for the 3 dimensional diskDisk algebra Lentoid Moment of inertia of a uniform disc DEFAULTSORT Disk Mathematics Category Euclidean geometry Category Rigid bodies ar bs Krug ca Cercle ... more details
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 disk drives 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 disk drives 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. All disk editors strive to be better than code debug command DEBUG ... from a Floppy disk floppy or Hard disk drive hard disk based on the BIOS . This permits simple disk ... and is in essence useless as disk editor for the system drive. The Resource Kit and the support ... Technet accessdate 2011 07 05 ref as a very simple disk editor supporting the use and modification ... of some disk editors or products containing them External links date August 2010 Windows Free Software ... more details
Refimprove date May 2009 distinguish page cache File Fujitsu MPG3307AH ms avrs 110909.jpg thumb The disk buffer sits on the controller board of the hard drive. In computer storage , disk buffer often ambiguously Fact date September 2007 called disk cache or cache buffer Fact date September 2007 is the embedded ... and the physical hard disk platter that is used for storage. Modern hard disks come with 8 ... from the disk platter. The disk buffer is physically distinct from and is used differently than the page cache typically kept by the operating 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 8 ... cache is reused multiple times, the data 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. Note that disk array controller s, as opposed to disk controller s, usually have normal cache memory of around 0.5&ndash 8 GiB. Uses Read ahead read behind When executing a read from the disk, the disk arm moves the Disk read and write head read ... 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 ... 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 ... from the disk buffer, and the file system on the disk may be left in an inconsistent state. On some ... of data is deemed more important than write performance. Another option is to send data to disk in a carefully ... more details
The term disk space is an amount of computer storage space on random access memory devices, such as on a hard drive , floppy or USB flash drive . Citation needed date September 2011 Disk space units are commonly measured in large numbers of bytes , such as kilobytes , megabytes , and gigabytes , with each unit 1024x times larger than the previous unit. The term originated in the 1950s, for the storage area on a hard disk drive , which internally had disk shaped platters to rotate quickly. As storage devices have been created in other shapes, the term disk space has still been used to refer to areas of permanent storage on various storage devices. The total disk space can span multiple devices, such as areas on an array of disk drives. ref NT Server and Disk Subsystem Performance , Microsoft.com, 2010, webpage http technet.microsoft.com en us library cc767920.aspx MS2 . ref The broader term storage space is so widely used that it can be mistaken for property storage, as with items stored in a closet or storage bin. Hence, the term disk space has remained in use, even when the storage devices are no longer shaped as disks. When storage of data is not permanent, then the common term memory space is often used instead. References Reflist Category Computer memory ... more details
Unreferenced stub auto yes date December 2009 Infobox Software name Disk Copy logo Deleted image removed Image Disk Copy.png Disk Copy icon screenshot caption developer Apple Computer latest release version 10.2 operating system System Software 6 , System 7 Macintosh System 7 , Mac OS 8 , Mac OS 9 , Mac OS X v10.0 , Mac OS X v10.1 , Mac OS X v10.2 genre disk image emulator license Disk Copy was the default utility for handling disk image s in System 7 Macintosh System 7 through Mac OS X 10.2 Usable in System Software 6 as well . In later versions of Mac OS X it has been replaced by DiskImageMounter for mounting the images and Disk Utility for creating them. Although the last official public release of Disk Copy for Mac OS 9 was version 6.3.3, there was to be a version 6.5 that supported the newer DMG image format introduced with Mac OS X. But because Apple had stopped support for OS 9 already, support for the old OS was eventually removed in favour of OS X. As such the OS 9 version of 6.5 only ever made it to beta 13 before development on it stopped. There was also a developer version 6.4 that 6.5 was based on and had most of the same functionality, but as a developer version it was never released. Although version 6.4 and 6.5 will read DMG images when the system is booted into OS 9, they can only do so if the image is not compressed. Disk Copy was also the name of an Apple utility distributed with some of the earliest version of the Mac OS. In order to copy 400K floppy disks using as few disk swaps as possible on a machine with only 128K of RAM, the original Disk Copy used the screen buffer to store binary data from the disk being copied as a result, the screen other than ... image formats Disk Copy Disk Copy 4.2 DiskSet PC drive container raw disk image See also DiskImageMounter The Mac OS X 10.3 and later successor. Disk Utility Creates disk images in Mac OS X 10.3 and later. RaWrite and RaWrite2 for MS DOS and Microsoft Windows dd Unix Category Mac OS Category Disk ... more details
Notability date August 2009 Primary sources date August 2009 Infobox software name Disk Order logo Deleted image removed Image Disk Order.png 48px screenshot Image Diskorder.png 250px caption Screenshot of Disk Order developer Like Mac Group latest release version 3.1 operating system Mac OS X genre File manager license Proprietary software Proprietary website http www.likemac.ru english www.likemac.ru english Disk Order is a shareware Norton Commander like file manager File Manager OFM for Mac OS X . See also Comparison of file managers Comparison of FTP client software External links http www.likemac.ru english The official site of Disk Order File managers Category Mac OS X software Category FTP clients mac software stub ru Disk Order ... more details
Infobox Software name Private Disk logo Image Private Disk logo.png screenshot Image Private disk main ... to update Comparison of disk encryption software latest release date November 10, 2010 latest preview ... Seven genre Disk encryption software language 17 languages license shareware price USD 65 website http www.dekart.com products encryption private disk www.dekart.com products encryption private disk Overview Private Disk is a disk encryption application for the Microsoft Windows operating system , developed ... on the fly other software can use the drive as if it were a usual one. One of Private Disk s key ... encryption. Although Private Disk uses a NIST certified implementation of the AES ref name NIST AES ... Disk the encryption hash library used ref http www.dekart.com fileadmin company Dekart 20NIST CSE 20AES ... ref , and not to Private Disk as a complete system. Feature highlights NIST certified implementation of Advanced Encryption Standard AES 256 bit, and SHA 2 . Private Disk complies with Federal Information Processing Standard FIPS 197 and Federal Information Processing Standard FIPS 180 2 Disk ... container format compatible with containers used by SecuBox disk encryption software by Aiko Solutions ... disk Compatibility with Windows 9x and Windows NT based operating systems including Windows Vista ... disk is mounted or dismounted Encrypted backup of an encrypted image Password quality meter Automatic backup of a disk s encryption key Built in password recovery tool Compatibility with 64 bit platforms Awards Existing versions There are multiple versions of Private Disk, which provide a different feature set http www.dekart.com products encryption private disk Private Disk hard disk encryption ..., USB disk portability, etc. http www.dekart.com products encryption private disk mf Private Disk Multifactor is a superset of Private Disk, providing the same functionality, adding support for biometric ... encryption private disk light Private Disk Light is a free version, it uses AES 128 and comes with a restricted ... more details
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