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
zone. Life could exist on either side of the disk, though close to the sun the heat would make ..., only a perpetual twilight . This could be solved by forcing the sun to bob up and down within the disk, lighting first one side then the other. In popular culture An Alderson disk the Godwheel was a prominent ... used technology and one which used magic paranormal magic each occupied separate sides of the disk . Author Larry Niven designed the Godwheel and wrote stories surrounding certain events on it. A disk shaped planet similar to an Alderson disk though far smaller served as the home world of the fantasy ... disk, the Aysle diskworld works according to fantasy physics, including a gravity plane that bisects the disk laterally, so that opposite sides fall towards the plane. The diskworld of Aysle had a bobbing sun and multiple inner layers. Both sides of the disk were inhabited, as were the internal layers. The Alderson disk is discussed in Larry Niven s Bigger than Worlds essay, 1974, which can be found ... Earth is placed on an Alderson disk built around a black hole by Alien space bats ASB s. See also Dyson ... 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 In later versions of Mac OS X it has been replaced by DiskImageMounter for mounting the images and Disk Utility for creating them.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
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 ... 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 can be split off and used for data backup, allowing the first disk to remain active. However merging ... more details
About the perforated disk used to modulate air jets to produce sounds Siren disambiguation A siren disk is a disk with holes variously spaced, such that when spun in front of an air jet, the holes modulate the jet in a primarily binary on off fashion, to directly produce sound. Typical usages of siren disks Siren disks were once used as the active element of sirens, but the majority of siren disks currently manufactured are used as instructional aids in teaching the mechanics of sound and music. For example, the Ontario Science Centre has a metal siren disk set up as an interactive teaching exhibit for children. Siren disk hole spacing The harmonic portion of the siren disk Most siren disks include several concentric circles of spaced holes, so that an air jet can be directed at different radii to get different effects. For example, the outermost eight hole circles include uniformly spaced holes, in which the number of holes increases along a harmonic series, so that eight notes of a musical scale can be played by directing an air jet sequentially at each circle. The nonharmonic portion of the siren disk Typically there are further holes near the central part of the disk, with various non uniform patterns, such as random spacing, and the like. Typical numbers of holes in siren disks ... notes of the most common kind of siren disk. The last eight circles of holes give the following ... 8 holes of the siren disk are br C, D, E, F, G, A, B, C br A similarly generated minor scale can be made by making a siren disk having the following ratios of hole numbers br 1, 9 8, 6 5, 4 3, 3 2, 8 ... the number of holes to make a minor scale siren disk br 1, 9 8, 6 5, 4 3, 3 2, 8 5, 9 5, 2 8 5 3 br br 120 135 144 160 180 192 216 240 br Typical siren disk setup The typical siren disk setup consists ... organ style keys so that children can play music on the siren disk by pressing the keys to open ... spaced holes of the siren disk. See also Siren noisemaker Category Rotating aerophones Category ... more details
SAN Disk may refer to Storage Area Network computer storage devices SAN disks SanDisk SanDisk Corporation formerly known as SunDisk disambig ... more details
Infobox Software name Jungle Disk logo screenshot caption author developer Jungle Disk, Inc. released 2007 operating system Microsoft Windows Windows Mac OS X Linux language English language English license Proprietary website http jungledisk.com jungledisk.com Jungle Disk is an Remote backup service online backup tool that stores its data in Amazon S3 or Rackspace Rackspace Cloud Cloud Files Cloud Files . It was highlighted by Amazon as one of the earliest S3 clients ref name techcrunch s3 cite web url http www.techcrunch.com 2006 07 12 amazon releases early info on s3 storage use author Kirkpatrick, Marshall publisher TechCrunch title Amazon releases early info on S3 storage use ref The basic Jungle Disk software is sold as a monthly subscription model, and the customer is billed directly by Amazon for data storage and transfer. Jungle Disk can periodically back up selected files or folders. It provides a local webdav server and a local web interface that synchronize to the user s S3 Cloud Files account, optionally encrypting backed up data on the client side. For a monthly fee, the company ... cite web url http www.eweek.com c a Data Storage Jungle Disk Aids Amazon Storage author Jason Brooks work eWeek publisher Ziff Davis title Jungle Disk Aids Amazon Storage ref Jungle Disk supports Linux , Mac OS X and Microsoft Windows Windows . On October 22, 2008, Jungle Disk entered into an agreement to be acquired by Rackspace Hosting, Inc. Rackspace purchased Jungle Disk in order to expand their cloud hosting services. Although owned by Rackspace, Jungle Disk continued to provide services with no changes ... Disk s security ref Cite web author Colin Percival title Insecurity in the Jungle disk url http www.daemonology.net ... of a file stored via Jungle Disk, they could transform it into anything they want planting ... attack on the Jungle Disk password. See also List of online backup services References reflist External ... storage de Jungle Disk ... more details
Disk cleaners are computer programs that find and delete potentially unnecessary or potentially unwanted files from a computer. The purpose of such deletion may be to free up disk space, to eliminate clutter or to protect privacy. Disk space consuming unnecessary files include temporary file s, trash computing trash , old backup s and web cache s made by web browsers. Privacy risks include HTTP cookie s, local shared object s, Computer data logging log files or any other trace that may tell which computer program opened which files. Disk cleaners must not be mistaken with antivirus software which delete malware , registry cleaner s which clean Windows Registry or data erasure software which securely delete files , although multifunction software such as those included below may fit into all these categories. Software Disk cleaning software with an article on Wikipedia CCleaner CleanGenius Disk Cleanup SlimWare Utilities Products SlimCleaner Temp File Cleaner Utility software with an article on Wikipedia that have disk cleaning functionality Acronis True Image Advanced SystemCare Advanced System Optimizer SlimWare Utilities Products FixCleaner Glary Utilities Jv16 powertools Norton Utilities Revo Uninstaller System Mechanic TuneUp Utilities Category Utility software type Software type stub ... 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 all NT based versions of Windows, including Windows 2000 , Windows Server 2003 , and Windows XP . Starting with Windows Vista , floppy F6 disks are obsolete its setup process supports loading third party drivers from USB flash drive USB drives and CD ROM CD ROMs . 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 being installed, the drivers are not included on the Windows installation discs, and they 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 . Prior to Windows Vista, F6 disks were always floppy disks because, at the point the F6 prompt is shown, Windows Setup has not loaded the drivers for any media type other than floppy disks. Support for USB drives and CD ROMs was added in Windows Vista. Device drivers for RAID and other disk controllers are often provided on CD ROMs by the manufacturers, but they must be copied to an F6 disk if they are to be used during Windows Setup. An alternative approach is to slipstream computing slipstream 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 then 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 ... more details
without drive emulation tmpfs refimprove date June 2009 A RAM disk or RAM drive is a block of Random ... as if the memory were a disk drive secondary storage . It is sometimes referred to as a virtual RAM ... containing RAM, which is a type of solid state drive . Performance The performance of a RAM disk is in general ... , hard disk drive hard drive , tape drive , or optical disk drive optical drive . ref cite web ... and type of file system , as well as others. File access time is greatly decreased since a RAM disk ..., alignment or positioning necessary. Second, the throughput maximum throughput of a RAM disk is limited ... 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 reboots. Implementation Software RAM disks ... kernel , it is possible to also create and manage a RAM disk by way of a user space application ... due to the temporary nature of the information stored in the RAM disk, but an uninterruptible power ... 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 developed into a commercial product and marketed ... the CPU could directly address. Making bank switched RAM behave like a disk drive was much faster than the disk drives especially in those days before hard drives were readily available on such machines. The Silicon Disk was launched in 1980, initially for the CP M operating system and later for MS ... Commodore computers, a RAM disk was also a popular application on Commodore 64 and Commodore 128 systems ... would automatically allocate a RAM drive named tt RAM tt . Microsoft added a RAM disk to MS DOS version ... more details
by the holes in a Nipkow disk A Nipkow disk sometimes Anglicized as Nipkov disk , also known as scanning disk , is a mechanical, geometrically operating image scanning device, invented by Paul Gottlieb Nipkow . This scanning disk was a fundamental component in mechanical television through the 1920s. Design The device itself is nothing more than a mechanically spinning disk of any suitable material ... of the disk and proceeding to the center of the disk, much like a gramophone record . The holes, when the disk rotates, trace circular ring surfaces, with inner and outer diameter depending on each hole s position on the disk and thickness equal to each hole s diameter. These surfaces may or may not partly overlap, depending on the exact construction of the disk. Process A lens projects an image of the scene in front of it directly onto the disk. ref cite web url http users.swing.be philippe.jadin nipkowdisk.htm title The Nipkow disk publisher Users.swing.be date accessdate 2010 03 02 ref Each ... by a sensor. If a light is controlled behind a second Nipkow disk rotating in synch at the same ... projected onto the original receiving disk. When spinning the disk while observing an object through the disk, preferably through a relatively small circular sector of the disk the viewport , for example, an angular quarter or eighth of the disk, the object seems scanned line by line, first by length ... the disk rapidly enough, the object seems complete, in a way similar to cinematography , and capturing ... of the disk but a small rectangular area with black cardboard which stays fixed , spinning the disk and observing an object through the small area. Here arises one of the drawbacks of the Nipkow disk ... disk should have either a very large diameter, which means smaller curvature , or a very narrow ... smaller holes millimeter or even micrometre micrometer scale closer to the outer sectors of the disk ... One of the few advantages of using a Nipkow disk is that the image sensor that is, the device converting ... more details
Infobox Windows component name Disk Cleanup logo Cleanmgr.png logo size 64px screenshot Windows Vista Disk Cleanup.png caption Screenshot of Disk Cleanup in Windows Vista type Disk maintenance application included with Windows 98 , Windows 2000 2000 , Windows Me Me , Windows XP XP , Windows Server 2003 Server 2003 , Windows Vista Vista , Windows Server 2008 Server 2008 , Windows 7 7 , Windows Server 2008 R2 Server 2008 R2 replaces replaced by related components Desktop Cleanup Wizard Disk Cleanup cleanmgr.exe is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer s hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files. There are a number of different file categories that Disk Cleanup targets when performing the initial disk analysis Compression of old files Temporary Internet files Temporary Windows file Downloaded program files Recycle Bin Removal of unused applications or optional Windows components Setup log files Off line files The above list, however, is not exhaustive. For instance, Temporary Remote Desktop files and Temporary Sync Files may appear only under certain computer configurations, differences such as Windows Operating System and use of additional programs such as Terminal Services Remote Desktop . The option of removing hibernation data may not be ideal for some users as this may remove the hibernate option. Aside from ... accessed files are compressed to free up disk space while leaving the frequently used files uncompressed ... that appear on the Disk Cleanup tab, the More Options tab offers additional options for freeing ... Microsoft Help and Support Description of the Disk Cleanup Tool in Windows XP accessed 7 June 2007 http www.theeldergeek.com disk cleanup utility.htm The Elder Geek on Windows XP Disk Cleanup Utility accessed 7 June 2007 http www.mindgems.com info Disk Cleanup.html Free Disk Cleanup Utility accessed ... more details
Unreferenced date June 2010 Disk storage or disc storage is a general category of storage mechanisms ... to as the Computer data storage media media . A disk drive is a device implementing such a storage ... the media as in compact disc drive and the compact disc. Notable types are the hard disk drive HDD containing a non removable disk, the floppy disk floppy disk drive FDD and its removable floppy disk ... File SixHardDriveFormFactors.jpg thumb Six hard disk drives File Floppy Disk Drives 8 5 3.jpg thumb Three floppy disk drives File Asus CD ROM drive.jpg thumb A CD ROM optical disc drive Background ... disk storage device was the IBM IBM magnetic disk drives IBM 350 RAMAC 350 shipped in 1956 as a part ... , high density storage provided by tape drive s using magnetic tape . Vigorous innovation in disk ... per bit gap between disk and tape, reducing the importance of tape as a complement to disk. Disk ... 180px heights 135px perrow 2 align right Image Samsung HD753LJ 01 Top.jpg center A typical hard disk ... Image Samsung HD753LJ 03 Opened.jpg center Top cover removed center Image Hard disk platters and head.jpg ... and disk center Image Hard disk head.jpg center Head on the disk platter center gallery Too HDD specific, putting better images in intro Digital disk drives are Computer data storage block storage devices . Each disk is divided into logical Block data storage blocks collection of sectors . Blocks are addressed ... to disk happens at the granularity of blocks. Originally the disk capacity was quite low and has been ... is the smallest size of data to be stored in a hard disk drive and each file will have many sectors ... into a format that the individual drive can use to store onto the disk itself. The data is then passed ... disk storage.svg thumb 300px Comparison of several forms of disk storage showing tracks not to scale ... of the heads across the disk as it moves between tracks. There are two types of disk rotation methods ... methods across disk storage devices. Storage devices focused on holding computer data, e.g., HDDs ... more details
Image Secchi disk pattern.svg thumb right Secchi disk pattern The Secchi disk , created in 1865 by Angelo Secchi Pietro Angelo Secchi SJ , is a circular disk used to measure water transparency optics transparency .... The depth at which the pattern on the disk is no longer visible is taken as a measure of the transparency ... , for the available light averaged over the Secchi disk depth. The light attenuation coefficient ... surface. ref Idso et al., 1974 ref Secchi disk readings do not provide an exact measure of transparency, as there can be errors due to the sun s glare on the water, or one person may see the disk at one depth, but another, with better eyesight, may see it at a greater depth. However a Secchi disk ... disk measurement should always be taken off the shady side of a boat or dock between 9 a.m. and 3 p.m. ... the disk beyond a point of disappearance, then raising it and lowering it slightly to set the Secchi depth. Another method is to record the depth at which the disk disappears, lower another few feet, then record the depth at which the disk reappears as it is slowly brought up. The Secchi depth is taken as the average of the two values. ref Cole 1994 ref Secchi disk measurements have been ... accessdate 9 February 2011 ref Secchi disk measurements do not indicate how attenuation changes ... Secchi Disk Light Extinction Equation British Ecological Society. Lind, Owen, T. 1979 . Handbook of Common Methods in Limnology. C.V. Mosby Co., St. Louis. Preisendorfer, R. W. 1986 . Secchi disk ... . http www.opticsexpress.org viewmedia.cfm?id 131137&seq 0 Why does the Secchi disk disappear? An imaging ... disk Leszek Bledzki Lead Author Nidhi Nagabhatla Topic Editor Secchi disk . In Encyclopedia of Earth ... Date October 5, 2010 Retrieved January 6, 2012 http www.eoearth.org article Secchi disk http www.webapps.cee.vt.edu ewr environmental teach smprimer secchi secchi.html Secchi Disk Transparency ... disk.php Secchi disk simulator http www.mlswa.org secchi.htm The Secchi disk what is it? http www.secchidipin.org ... more details
About computer music collections the Purple Motion album Musicdisk album demoscene Music disk , or musicdisk , is a term used by the demoscene to describe a collection of songs made on a computer. They are essentially the computer equivalent of an album . A music disk is typically packaged in the form of a program with a custom user interface , so the listener does not need other software to play the songs. The disk part of the term comes from the fact that music disks were once made to fit on a single floppy disk , so they could be easily distributed between friends and at demoparty demo parties . On modern platform computing platforms , music disks are usually downloaded to a hard disk drive . Songs in a music disk are typically composed with a tracker music software tracker , a type of program popular in the demoscene. Amiga music disks usually consist of MOD file format MOD files, while IBM PC PC music disks often contain multichannel formats such as Fast Tracker XM or Impulse Tracker IT . Music disks are also common on the Commodore 64 and Atari ST , where they use their own native formats. Related terms include music pack , which can refer to a demoscene music collection that does not include its own player, and chipdisk , a music disk containing only chiptune s, which have become popular on the PC given the large size of MP3 music disks. External links http www.pouet.net prodlist.php?type 5B 5D musicdisk Musicdisks on Pouet.net http chipdisk.ru Chip Music Online unreferenced date August 2007 Category Demoscene Category Albums de Music Disk fr Music disk ... more details
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 Protoplanetary disk 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 a pocket of matter within a giant molecular cloud . The infalling material possesses some amount of angular momentum , which results in the formation of a gaseous protoplanetary disk around the young, rotating star. The former is a rotating circumstellar disk of dense gas and dust that continues ... of gas which is itself mainly hydrogen . The accretion disk phase lasts a few to 10 million years .... 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 ... of a Circumprimary 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 disks Category ... schijf ja pl Dysk protoplanetarny sk Protoplanet rny disk fi Protoplanetaarinen ... more details
Disk encryption is a technology which protects information by converting it into unreadable code that cannot be deciphered easily by unauthorized people. Disk encryption uses disk encryption software or disk encryption hardware hardware to encryption encrypt every bit of data that goes on a disk storage disk or disk volume computing volume . Disk encryption prevents unauthorized access to data storage. The term full disk encryption or whole disk encryption is often used to signify that everything on a disk is encrypted, including the programs that can encrypt booting bootable operating system disk partitioning partitions . But they must still leave the master boot record MBR , and thus part of the disk, unencrypted. There are, however, hardware based full disk encryption systems that can truly encrypt the entire boot disk, including the MBR. Disk encryption vs. filesystem level encryption Disk encryption does not replace file or directory encryption in all situations. Disk encryption is sometimes ... secure implementation. Since disk encryption generally uses the same key cryptography key for encrypting the whole volume, all data is decryptable when the system runs. However, some disk encryption ... instead allows different keys for different portions of the disk. Thus an attacker cannot extract information from still encrypted files and folders. Unlike disk encryption, filesystem level encryption ... timestamps or sizes. Disk encryption and Trusted Platform Module Trusted Platform Module ... system. A limited number of disk encryption solutions have support for TPM. These implementations can wrap the decryption key using the TPM, thus tying the hard disk drive HDD to a particular ... this has the advantage that the disk cannot be removed from the device, it might create a single point ... that user has a separate recovery key. Implementations Main Comparison of disk encryption software Disk encryption hardware There are multiple tools available in the market that allow for disk encryption ... more details
A disk quota is a limit set by a system administrator that restricts certain aspects of file system usage on modern operating system s. The function of using disk quotas is to allocate limited disk space in a reasonable way. Types of quotas There are two basic types of disk quotas. The first, known as a usage quota or block quota , limits the amount of disk space that can be used. The second, known as a file quota or inode quota , limits the number of files and directories that can be created. In addition, administrators usually define a warning level, or soft quota , at which users are informed they are nearing their limit, that is less than the effective limit, or hard quota . There may also be a small grace interval , which allows users to temporarily violate their quotas by certain amounts if necessary. Quotas Disk quotas are typically implemented on a per user or per group basis. That is, a system administrator defines a usage or file quota specific to a certain user or group. In doing so, an administrator can prevent one user from consuming an entire file system s resources, or create ... taken. Some systems prevent disk write operations that would result in hard quota violations from ... on Windows 2000 Disk quotas are supported by most modern operating systems, including Unix like ... , OpenVMS VMS , and others. The method of administration for disk quotas varies between each of these operating ... period of time. Windows 2000 and newer versions use the Quota tab of the disk properties dialog. Other systems provide their own quota management utilities. Common Unix Disk Quota Utilities quota display a user s file system disk quota and usage edquota Edit user quotas for file system repquota ... disk quota.htm AIX disk quota system overview , IBM http www.cyberciti.biz faq solaris unix disk quota tutorial Solaris disk quota tutorial . http sourceforge.net projects linuxquota Linux DiskQuota ... de Disk Quota es Cuota de disco pl Limity dyskowe ... more details
Image Disk II.jpg thumb right Disk II drives. The Disk II Floppy Disk Subsystem , often spelled as Disk , was a 5 inch Floppy disk floppy disk drive designed by Steve Wozniak and manufactured by Apple ... for 595 including the Disk controller controller card which can control up to two drives and cable. The Disk II was designed specifically for use with the Apple II personal computer family to replace ... computer without an Apple IIe Card . Apple produced at least six variants of the basic 5 inch Disk II concept over the course of the Apple II series lifetime The Disk II, the Disk III, the DuoDisk, the Disk IIc, the UniDisk 5.25 and the Apple 5.25 Drive. While all of these drives look differently ... use the same low level disk format, and are all interchangeable with the use of simple adapters, consisting of no more then two plugs and some wires between them. Most DuoDisk drives, the Disk IIc, the UniDisk ... interchangeable. This is not the case with Apple s 3.5 drives, which use several different disk formats ... connector, and are not generally interchangeable. History Disk II Apple did not originally offer a disk ... York Times date 1997 09 01 ref The first Disk II drives A2M0003 sold were built using parts from ... Computer, Inc., Fall 1990 9 16. ref Normal storage capacity per disk side was 113.75kiB with DOS 3.2.1 ... and the controller card, not the drive itself. The Disk II drive mechanism and all other Apple II 5.25 ... for users to manually flip the disk to utilize the opposite side, after cutting a second ... than one disk side was shipped on such flippy disks as well. Only one side could be accessed at once ... in the early years, when the media was still quite expensive. In the Disk II, the full height ... any disk inserted into it as soon as it starts spinning, even write protected disks such as those ... for the original Disk II were eventually available for use with Apple s later connector standard ... for the main 5.25 disk drive and fails otherwise. A Bell & Howell version of the Disk II was also ... more details
Multiple issues original research December 2011 refimprove December 2011 merge to disk image date December 2011 Disk cloning is the process of copying the contents of one computer hard disk to another disk or to an image file. This may be done straight from one disk to another, but more often, the contents of the first disk are written to an disk image image computer file file as an intermediate step, then the second disk is loaded with the contents of the image. Typically, this is done for archiving purposes, to restore lost or damaged data, or to move wanted data into a new disk, though other reasons also exist. Unlike standard copying functions, disk cloning involves copying hidden and in use ... to address these and other issues. Common 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 ... An individual user may use disk copying cloning to upgrade to a new, usually larger, hard disk ... or information. How it works This article is specific 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 ... IBM PC partition s on the diskDisk formatting Format each partition to create a file system ... 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 ... 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 ... format zip to copy files. It is not sufficient simply to copy all files from one disk to another, because ... more details
Unreferenced date June 2009 A disk filter is a type of filter water water filter used primarily in irrigation, similar to a screen filter , except that the filter cartridge is made of a number of disks stacked on top of each other like a pile of poker chips. The water passes through the small grooves in between and the impurities are trapped behind. Some types of disk filters can be backflushed in such a way that the disks are able to separate and spin during the cleaning cycle. Category Filters Category Irrigation tech stub ... more details
Infobox Anatomy Name Articular disk Latin discus articularis GraySubject 70 GrayPage 285 Image Joint.png Caption Typical joint Image2 Gray336.png Caption2 Vertical section through the articulations at the wrist, showing the synovial cavities. Articular disk labeled at center right. Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre d 22 DorlandsSuf 12300651 The articular disk or disc is a thin, oval plate of fibrocartilage present in several joints which separates synovial cavities. This separation of the cavity space allows for separate movements to occur in each space. The presence of an articular disk also permits a more even distribution of forces between the articulating surfaces of bones, increases the stability of the joint, and aids in directing the flow of synovial fluid to areas of the articular cartilage that experience the most friction. The term Meniscus anatomy meniscus has a very similar meaning. ref http anatomy.med.umich.edu modules joints module joints 13.html Module Introduction to Joints Bot generated title ref Additional images gallery Image Gray325.png Sternoclavicular articulation. Anterior view. Image Gray300.png Diagrammatic section of a diarthrodial joint, with an articular disk. gallery See also Triangular fibrocartilage articular disk of the distal radioulnar articulation Articular disk of the temporomandibular joint Articular disk of sternoclavicular articulation References reflist External links SUNYAnatomyFigs 10 06 15 KansasHandKinesiology ligaments wvsartgroup.htm eMedicineDictionary Articular disc Joints Category Joints musculoskeletal stub ar de Discus articularis fr Disque articulaire ... more details
Infobox fictional artifact name Golden Disk image Csmegatronii3.jpg imagesize caption Megatron holds the Golden Disk alt source Transformers fiction Transformers source type franchise company first first ep first type date creator episode creator type A golden metallic disk genre Science fiction owner uses Information storage The Golden Disk is a fictional artifact from the Transformers series. Beast ... Record The Golden Disk is a relic from the Beast Wars Transformers timeline, and a key plot device ... ians, though, the disk also included a message from the original The Transformers animated .... Knowing of the tale that claimed the Golden Disk contained the location of a major Energon deposit, Megatron stole the disk, and uncovered the original Megatron s encoded message. Keeping this particular ... seeded on the planet. In time, a second Golden Disk was found, this one a creation of the mysterious race of Vok aliens using prehistoric Earth for various experiments. A solid, thick disk, rather than the gold plated record of the Voyager disk, the alien disk was marked with several symbols which ... s former comrade, Dinobot , later stole both disks from Predacon control, but hid the alien disk, returning the Earth disk to Megatron in a show of renewed loyalty once it became clear that they were on Earth. Megatron subsequently stole the alien disk from the Maximals, and put it to use controlling ... disk was also destroyed No longer able to exploit alien devices, and with his plans to gather ..., and opted instead to attempt to alter history through a different means, using the information on the disk ... on a suicide mission to stop him, eventually using the last of his strength to shatter the disk with a laser eye blast. This was, however, not the last use of the Golden Disk after he was captured by Ravage ... all involved in the Beast Wars , Megatron used a fragment of the Earth disk to play back a piece ... Productions The Golden Disk would also make several appearances in Dreamwave Productions Dreamwave ... more details
refimprove date February 2010 Infobox record label See Wikipedia WikiProject Music name ESP Disk image Image Esp disk logo.jpg 120px image bg background color for logo, should remain empty white unless required parent parent company, such as Warner Music Group founded 1964 founder Bernard Stollman status leave blank unless Inactive or Defunct distributor distributors, separate with commas or BR genre Underground rock , Folk rock , Free improvisational music country Flag USA location Brooklyn , New York motto The artists alone decide what you will hear on their ESP Disk url http www.espdisk.com www.espdisk.com ESP Disk is a New York based record label , founded in 1964 in music 1964 ref Space Is The Place, Szwed, Mojo 2000, p207 ref by lawyer Bernard Stollman . From the beginning, the label s goal has been to provide its recording artists with complete artistic freedom, unimpeded by any record company interference or commercial expectations a philosophy summed up by the ESP motto, printed on every release The artists alone decide what you will hear on their ESP Disk . Though it originally existed to release Esperanto based Esperanto music music , starting with its second release Albert Ayler s Spiritual Unity , ESP became the most important exponent of what is commonly referred to as free jazz ref cite book last Wilmer first Val authorlink Val Wilmer title As Serious As Your Life The Story of the New Jazz publisher Quartet year 1977 isbn 070433164 pages 231 233 ref . ESP also released recordings by uncommercial underground rock acts including the Fugs , The Godz NYC band The Godz ... responsibility for reissues and for emerging artists. Discography main ESP Disk discography References ... Disk Mashup music mash up by Wu Ming 1 Jazz DEFAULTSORT Esp Disk Category Alternative rock record labels Category American record labels Category ESP Disk albums Category ESP Disk artists Category ... in 1966 de ESP Disk fr ESP Disk ... 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 partitions 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 that reliability was a problem and systems using RAID technology evolved. This means that more than one physical disks are RAID ed together to produce a single logical disk . In a modern home Personal computer PC environment, disk drives 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 ... Logical Disk Category Computer storage Category Storage virtualization pl Partycja logiczna simple Logical disk ... more details
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