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 ...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 ... disk compression works Disk compression usually creates a single large file, which becomes a Storage virtualization virtual hard drive. This is similar 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 would initially be empty. The utility to create a drive ... more details
number of bytes, is the unit of memory that is read from and written to a disk by a disk driver. The earliest diskdrives had fixed block sizes e.g. the IBM magnetic diskdrives IBM 350 IBM 350 disk storage ... storage 3390.html IBM 3390 direct access storage device ref Modern hard diskdrives such as Serial ... and Serial ATA SATA ref ISO IEC 791D 1994, AT Attachment Interface for DiskDrives ATA 1 , section 7.1.2 ref drives, appear at their interface computing interface s as a contiguous set of fixed size ... level format of a 10 megabyte IBM Personal Computer XT IBM PC XT hard drive. Hard diskdrives prior ... low 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 ... today do not handle low level functions for HDDs and optical diskdrives such as writing timing marks ... single write is generally all that is needed on modern hard diskdrives. See also Data erasure Data ...Image Formatting c drive.JPG thumb Formatting a hard drive using MS DOS Disk formatting is the process of preparing a hard disk drive or flexible disk medium for data storage. In some cases, the formatting ... and the term format is understood to mean an operation in which a new disk medium is fully ... s FORMAT.COM utility as a hard drive is being formatted. As a general rule, formatting a disk is destructive ... 1301 disk storage unit author publisher IBM date accessdate 2010 06 24 ref IBM marketed subsystems ... access storage device disk subsystems on the IBM System 360 expanded this concept in the form of Count ... hard disk drive manufacturers began releasing hard disk drive platforms using the Advanced Format of 4096 ... to 4K Sectors , Seagate Corp. 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 ... sizes depending upon the host OS and controller. Optical disk s generally only use fixed block ... more details
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 between a center, two radius radii and a corresponding arc see Figure 1, item B , which is shaped like a slice of a pie. Thus, the disk sector Figure 1, item C refers to the intersection of a track and mathematical sector . In diskdrives ... of 512, 1024, 2048, or 4096. Cray Research had an 819 disk controller in 1975 that transferred 512 64bit words per sector. Later, Specify date March 2011 hard diskdrives supporting 1,024 byte sectors ... By the end of 2007, Samsung 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 ... hard disk drive manufacturers, Seagate, Toshiba and Western Digital, began producing hard drives ... hard diskdrives. Under the auspices of IDEMA, the date for the transition from 512 to 4096 byte ...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 ... with the inception of the hard disk drive in 1956. Dubious date March 2012 Through a coordinated effort organized by the industry trade organization, International Disk Drive Equipment and Materials ... the outside of the disk. However, each sector still contained the same number of bytes. This was accomplished ... disks use zoned bit recording, where the disk is divided into zones encompassing a small number contiguous ... and sectors tracks are concentric circles. Advanced Format main Advanced Format Hard disk drive manufacturers ... of Advanced Format using 4096 byte sectors, hard disk drive manufacturers could increase the efficiency ... 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
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
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
flash drives . Booting from a disk A modern PC is configured to attempt to boot from various devices ...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 troubleshooting Customizing an operating environment Software demonstration Administrative access in case of lost password is possible with an appropriate boot disk with some operating systems Games e.g. for Amiga games Amiga home computers While almost all modern computers can boot from a hard drive containing ... s are the most common forms of media used, but other media, such as magnetic or paper tape drives ... program to use some system RAM as a RAM disk for temporary computer file file storage. As an example ... a virus written to their first sector which silently infect the host computer if switched on with the disk ... versions of Linux . The most commonly available floppy disk can hold only 1.4 Megabyte MB of data in its ... be made. Modern Apple computers will boot from an appropriate disk if the user presses the C key while the machine is starting. Required files Different operating systems use different boot disk contents ... boot sector on the floppy disk, not in the format of a normal disk Computer file file . IO.SYS or IBMBIO.COM ... of files into the USB drive and the installation of a bootloader. FreeDOS A valid boot sector on the disk COMMAND.COM KERNEL.SYS Linux A bootloader such as SYSLINUX or GRUB Linux kernel Initial ram disk ... Disks http bootdisk.com Boot Disk information, sources, and tools 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 ... more details
partition. Other partitions may exist on the hard disk that may or may not be visible as drives ...Image GParted.png thumb 300px GParted is a popular utility used for disk partitioning Disk partitioning is the act of dividing a hard disk drive into multiple logical storage units referred to as partitions , to treat one physical disk drive as if it were multiple disks. Partitions are also termed slice disk slices for operating systems based on BSD , Solaris operating system Solaris or GNU Hurd . A partition ... on the hard disk. Benefits of multiple partitions Creating more than one partition has the following ... disk image image backup s or disk cloning clones to be made of only the operating system and installed ... on different partitions of the same hard disk and have a choice of booting into any compatible ... unbootable due to virus or single disk error in a critical windows file can be rescued without loosing ... on different disk locations, which practically can t get all corrupted at the same time. Also, the chance ... drives with only one NTFS file system typically have a very large sequential access sequentially accessed ... just creating a partition lesser size than available on the disk. For example a 1 TB disk might ... the following disadvantages, as compared to having a single partition spanning the same disk area Reduces the total space available for user storage on the disk, as it forces the operating system to duplicate certain file system administration areas on the disk for each partition. Reduces overall disk ... it forces the disk s read write head to move back and forth on the disk to access data on each ... on each partition. It also prevents disk optimizers from moving all frequently accessed files closer to each other on the disk, which could reduce the number and distance of required head movements. Files ... be far apart on the disk. See short stroking considerations above. This issue does not apply to Solid ... positions. Increases disk fragmentation because it lowers the average size of continuous free blocks ... 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 computing caching of data stored on the disk. disambig ko zh ... 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
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
Image M42proplyds.jpg thumb A proplyd in the Orion Nebula Image Protoplanetary disk HH 30.jpg thumb The protoplanetary disk 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 ... of a protoplanetary disk. Credit ESO L. Cal ada Image Mamajek09 diskfraction.jpg thumb Fraction of stars that show some evidence of having a protoplanetary disk as a function of stellar age in millions ... last4 Ishii first4 Miki ref harv ref A protoplanetary disk is a rotating circumstellar disk of dense ... disk 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 ... out of dough&mdash and take the form of a disk. The initial collapse takes about 100,000 years. After ... 422550 ref harv arxiv astro ph 0405271 ref before the disk disappears, perhaps being blown away .... The oldest protoplanetary disk ever discovered is 25 million years old. ref cite journal bibcode 2005ApJ...621L..65W author White, R.J. & Hillenbrand, L.A. title A Long lived Accretion Disk around ... systems. Electrostatic and gravitational interactions may cause the dust and ice grains in the disk to accrete into planetesimal s. This process competes against the stellar wind , which drives ... not truly protoplanetary , but represent a later stage of disk evolution where extrasolar analogs ... have formed in the protoplanetary disk of cosmic dust dust grains surrounding the Sun before the formation ... formation Formation and evolution of the Solar System Herbig Haro object Debris disk References Reflist ... disks Protoplanetary disk ar ca Disc protoplanetari cs Protoplanet rn disk de Protoplanetare ... Protoplanetarni disk it Disco protoplanetario lt Proplanetinis diskas hu Protoplanet ris korong nl Protoplanetaire ... ru sk Protoplanet rny disk fi Protoplanetaarinen kiekko sv Protoplanet r ... 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 Mount computing mount ing, unmounting, and ejecting 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 this will work for both Mac compatible format partitions, and FAT32 ... ref http support.apple.com 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 a zero out data, a 7 pass NISPOM DOD 5220 22 M standard, or a 35 pass Gutmann ... Mac OS X How to combine RAID 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 ... Technology S.M.A.R.T status of a hard disk. Disk Utility functions may also be accessed from ... 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 ... 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 Disc ... 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
In Sun Microsystems Solaris operating system Solaris computer operating system , disk partition s are sometimes known as slices . This is a conceptual reference to the slicing of a cake into several pieces. A slice is composed of a contiguous range of blocks on a disk. The term slice is also used in the FreeBSD operating system to refer to PC BIOS hard disk partitions, to avoid confusion with FreeBSD s own BSD disklabel disklabel based partitioning scheme. See also wikibooks Guide to Unix Explanations Partitioning Disks Partitioning Disks Disk partitioning BSD disklabel List of disk partitioning software References http docs.sun.com app docs doc 817 5093 disksconcepts 20068?l en&a view Solaris 10 System Administration Guide Devices and File Systems http www.freebsd.org doc en US.ISO8859 1 books handbook disks adding.html FreeBSD Handbook Compu stub Category Disk file systems Category Disk partitioning software Category Operating system technology Category Sun Microsystems software ... more details
Disk Manager was a popular 1980s and 1990s software and documentation package for MS DOS and PC DOS computers, useful for self installing personal computer Hard disk drive hard disk s. It was written by Ontrack, a company later acquired by Kroll Inc. Installation covered different aspects explaining personal computer hardware concepts documenting switches of many of the existing disks putting into place custom device driver s which circumvented Enhanced BIOS BIOS limitations , notably those related to maximum disk or partition size and logical block addressing providing testing and informational utilities Drivers could be either DOS type, or replacement master boot record code. Diskettes with Disk Manager were provided by some disk manufacturers e.g. IBM , in custom OEM versions, supporting all of their models. In recent years Kroll switched to the business of providing computer disk data recovery services as Kroll Ontrack Data Recovery . External links http www.ontrackdatarecovery.com Kroll Ontrack Data Recovery Category Windows software Category Utility software Windows software stub ... more details
mergefrom Staging data discuss Talk Disk staging Merger proposal date October 2010 Unreferenced date December 2009 Disk staging is using hard disk disks as an additional, temporary stage of backup process before finally storing backup to magnetic tape data storage tape . Backups stay on disk typically for a day or a week, before being copied to tape in a background process and deleted afterwards. The process of disk staging is controlled by the same software that performs actual backups, which is different from virtual tape library where intermediate disk usage is hidden from main backup software. Both techniques are known as D2D2T disk to disk to tape . Restoring data Data is restored from disk if possible . But if the data exists only on tape it is restored directly no backward staging on restore . Reasons Reasons behind using D2D2T increase performance of small, random access restores disk has much faster random access than tape increase overall backup restore performance although disk and a tape have similar streaming throughput, you can easily scale disk throughput by the means of Data striping striping and tape striping is a much less established technique increase utilization of tape drive s tape shoe shining effect is eliminated when staging note that it may still happen on tape restores See also Backup Virtual tape library DEFAULTSORT Disk Staging Category Computer storage kk zh ... more details
Otheruses2 Disc Image Unit disk open.svg thumb right An open Euclidean unit disk In mathematics , the open unit disk or disc around P where P is a given point in the plane mathematics plane , is the set ... disk around P is the set of points whose distance from P is less than or equal to one math bar D 1 P Q P Q leq 1 . , math Unit disks are special cases of disk mathematics disks and unit ball s. Without further specifications, the term unit disk is used for the open unit disk about the origin mathematics ... plane C , the unit disk is often denoted math mathbb D math . The open unit disk, the plane, and the upper ... analytic and bijective function from the open unit disk to the plane its inverse function is also analytic. Considered as a real 2 dimensional analytic manifold , the open unit disk is therefore isomorphic to the whole plane. In particular, the open unit disk is homeomorphic to the whole plane. There is however no conformal map conformal bijective map between the open unit disk and the plane. Considered as a Riemann surface , the open unit disk is therefore different from the complex plane . There are conformal bijective maps between the open unit disk and the open upper half plane . So considered as a Riemann surface, the open unit disk is isomorphic biholomorphic , or conformally equivalent ... unit disk. One bijective conformal map from the open unit disk to the open upper half plane is the M bius ... so that the upper half plane becomes the disk s interior and the real axis forms the disk s circumference ... unit disk to the open upper half plane can also be constructed as the composition of two stereographic projection s first the unit disk is stereographically projected upward onto the unit upper half ... sphere opposite to the touching point as projection center. The unit disk and the upper half plane ... space The open unit disk is commonly used as a model for the Hyperbolic space hyperbolic plane ... the open unit disk and the upper half plane, this model can be turned into the Poincar half ... more details
Orphan date April 2012 Infobox Software name Private Disk logo Image Private Disk logo.png screenshot Image Private disk main window.PNG 285px caption developer Dekart latest release version 2.12 If you update this, don t forget to update Comparison of disk encryption software latest release date November ... NT family , Windows 7 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 ... Disk s key selling points is in its ease of use, which is achieved by hiding complexity from ... the use of AES 256 encryption. Although Private Disk uses a NIST certified implementation of the AES ... of Private Disk the encryption hash library used ref http www.dekart.com fileadmin company ... Secure 20Hash 20Standart.pdf 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 ... FIPS 180 2 Disk Firewall , an application level filter, which allows only trusted programs to access ... the encrypted container format compatible with containers used by SecuBox disk encryption software ... them to an encrypted disk Compatibility with Windows 9x and Windows NT based operating systems including ... when a virtual 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 software that uses 256 bit AES encryption, is highly configurable, offers application level protection, USB disk portability, etc. http www.dekart.com products encryption private disk ... more details
Multiple issues unreferenced December 2009 context October 2009 Image HP HASS NIKE.jpg thumb Hewlett Packard disk arrays HASS top and NIKE OEM d Data General SCSI Clariion Image EMC Clariion CX500.jpg thumb EMC Corporation EMC CLARiiON CX500 Cover removed on one Shelf Image EMC Symmetrix DMX1000 Front.jpg thumb EMC Corporation EMC Symmetrix DMX1000 A disk array is a disk storage system which contains multiple disk drive s. It is differentiated from a disk enclosure , in that an array has cache computing cache memory and advanced functionality, like redundant array of independent disks RAID and Storage virtualization virtualization . Components of a typical disk array include Disk array controller s Cache computing Cache memories Disk enclosure s Power supply Power supplies Typically a disk array provides increased availability, resiliency and maintainability by using additional, redundant components controllers, power supplies, fans, etc. , often up to the point when all single point of failure single points of failure SPOFs are eliminated from the design. Additionally those components are often hot swappable. Typically, disk arrays are divided into categories Network attached storage NAS arrays storage area network SAN arrays Modular SAN arrays Monolithic SAN arrays Utility Storage Arrays Storage virtualization DEFAULTSORT Disk Array Category Computer storage Category Fault tolerant computer systems Category RAID de Disk Array fr Baie de stockage ja pl Macierz dyskowa ru ... 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
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
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