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Disk staging





Encyclopedia results for Disk staging

  1. Disk staging

    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



  1. Staging

    Wiktionary Staging may refer to Staging cooking , a chef works briefly and without pay in another chef s kitchen to learn to new techniques and cuisines Staging rocketry , the use of multiple engines and propellant to launch a rocket Staging stagecoaches , the business of running stagecoaches or the act of journeying in them Staging theatre , the process of selecting, designing, adapting to, or modifying the performance space for a play or film Staging websites , a website used to assemble, test and review its newer versions before it is moved into production Staging area , a location used to prepare items for use, such as for a military operation Cancer staging , a description usually numbers I to V of how much the cancer has spread Disk staging , using disks as an additional, temporary stage of backup process before finally storing backup Home staging , preparing a residence for sale in real estate Staging, the process of aligning cars on the starting line in Drag racing Staging drag racing Staging, in bird migration the practice of pausing at places along a migration route to rest and feed before proceeding disambig de Stadienbestimmung ...   more details



  1. Staging (data)

    orphan date August 2010 mergeto Disk staging discuss Talk Disk staging Merger proposal date October 2010 In Data warehouse terms, a data staging area is an intermediate storage area between the sources of information and the data warehouse DW or Data mart DM . It is usually of temporary nature, and its contents can be erased after the DW DM has been loaded successfully. A staging area can be used for any of the following purposes, among others To gather data from different sources that will be ready to process at different times. To quickly load information from the operational database, freeing it up as soon as possible. All the needed transformations can then occur without interfering with the operation. To find changes against current DW DM values. For data cleansing To pre calculate aggregates. Since the data staging structure does not need to resemble the structure of either the source or the target ref name Kimball Ref http www.kimballgroup.com html articles search articles1998 9804d05.html Is Data Staging Relational? , Ralph Kimball, 1998. ref , the mere process of loading the staging area can be a step of the Extract, transform, load ETL process in itself. references Category Data warehousing ...   more details



  1. Disk-to-disk

    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



  1. Staging site

    Unreferenced auto yes date December 2009 Staging site , in website design , is a website used to assemble, test and review its newer versions before it is moved into production. This phase follows the Development environment development phase . The staging phase of the software life cycle is often tested on hardware that mirrors hardware used in the production environment. The staging site is often different from the development site, and provides a Quality assurance QA zone that is separate from the development or production environments. Normally before deploying an updated version of software to the production environment, the update has been tested in the staging environment. The staging server will resemble the production environment where the clients can do the user acceptance testing activities. Tests on Staging server site should be passed before deployment of system on live server, i.e. production environment. See also Development environment software development process DEFAULTSORT Staging Site Category World Wide Web Category Human computer interaction Category Information Age Web stub pt Site staging ru Site staging ...   more details



  1. The Disk

    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



  1. Pathological staging

    Pathological staging is a method used to determine the stage of cancer . Tissue samples are removed during surgery or a biopsy . The stage is determined based on how the cells in the samples look under a microscope . External links http www.cancer.gov Templates db alpha.aspx?CdrID 257214 Pathological staging entry in the public domain NCI Dictionary of Cancer Terms NCI cancer dict Category Cancer staging oncology stub ...   more details



  1. Staging area

    Use dmy dates date April 2012 Refimprove date September 2008 A staging area or staging point is a location ... and usage In construction A staging area is a designated area where vehicles, supplies, and construction ... places of Bird migration migratory birds are referred to as staging areas. In entertainment Staging areas are an area designated for setting up parades and other elaborate presentations. In the military In military uses, a staging area is a place where troops or equipment in transit are assembled or processed. ref http www.bartleby.com 61 59 S0695900.html Staging area from the American Heritage ... stage staging. ref http www.dtic.mil doctrine jel doddict data s 10684.html DOD Dictionary ... staging area has been termed a point d appui , which point is often on high ground and sometimes ... , Scotland . Unlike normal bases, the facilities of a staging area are temporary, mainly because .... Militaries use staging areas to deploy military unit s, aircraft and warship s plus their materiel ... unrelated country granting access. In incident management Staging areas are established for temporary location of available emergency responder resources. A Staging Area can be any location ... assignment. Staging Areas may include temporary feeding, fueling, and sanitation services for emergency crews like Wildland firefighters or Ground Search and Rescue. Staging areas are established ... assigned. The Operations Section Chief assigns a manager for each Staging Area, who checks in all ... Logistics Section Support, as necessary, for resources located in the Staging Area. Personnel check in with the Resources Unit at the Staging Area, while supplies and equipment are checked in with the Supply Unit. If neither of these functions is activated, resources report to the Staging Area Manager for direction. In space exploration main Staging rocketry In space exploration, the area where final ... main Staging data In Data warehouse terms, a data staging area is an intermediate storage area ...   more details



  1. Cancer staging

    to if any , and whether it has spread to distant organs. Staging of cancer is the most important predictor of survival, and cancer treatment is primarily determined by staging. Thus, staging ..., however, may be restaged after treatment but the staging established at diagnosis is rarely changed. TNM staging system main TNM staging system Cancer staging can be divided into a clinical stage and a pathologic stage . In the TNM staging system TNM Tumor, Node, Metastasis system, clinical stage ... and pathologic stage often differ. Pathologic staging is usually considered the better or truer stage because it allows direct examination of the tumor and its spread, contrasted with clinical staging ... which is still in the body. However, clinical staging and pathologic staging should complement each other. Not every tumor is treated surgically, therefore pathologic staging is not always available ... which shrink the tumor, so the pathologic stage may underestimate the true stage. This staging ... in staging Correct staging is critical because treatment is directly related to disease stage. Thus, incorrect staging would lead to improper treatment, and material diminution of patient survivability. Correct staging, however, can be difficult to achieve. Pathologic staging, where a pathologist ... staging and improper treatment can result. New, highly sensitive methods of staging are in development ... of underestimation of true disease stage. Researchers hope that staging with this level ... hope that this same technique can be applied to other tissue specific proteins . Systems of staging Staging systems are specific for each type of cancer e.g., breast cancer and lung cancer . Some cancers, however, do not have a staging system. Although competing staging systems still exist for some types of cancer, the universally accepted staging system is that of the International Union Against ... on Cancer AJCC . Systems of staging may differ between diseases or specific manifestations of a disease ...   more details



  1. Home staging

    original research date January 2010 refimprove date January 2010 Home staging is the act of preparing a private residence for sale in the real estate marketplace. The goal of staging is to make a home appealing to the highest number of potential buyers, thereby selling a property more swiftly and for more money. Staging techniques focus on improving a property s appeal by transforming it into a welcoming, attractive product that anyone might want. ref name KEY Holmes, Tamara E. http www.bankrate.com finance real estate home staging key to selling 1.aspx Home staging key to selling Bankrate.com, Real Estate Guide 2010 ref History Staging a home has always been part of the homeowner s responsibility, but it was often as simple as keeping the grass cut and picking up dirty clothes. The seller s agent would recommend actions if the owners were clueless about elements that turn off potential buyers. The Late 2000s recession turned real estate into a http en.wiktionary.org wiki buyer 27s market buyer s market , wherein sellers look for any advantage to make their property stand out from the rest. ref name KEY US Image Family room 700.jpg thumb Home staged for resale family room, kitchen U.S. research based on surveys of real estate agents states that home staging can reduce a listing s time on the market by one third to half, and could fetch as much as 10 15 more than an empty home or a home not properly staged. Citation needed date July 2008 UK In Britain, home staging is sometimes ... September 2008 Image Nursery home staging 700.jpg thumb Home staged for resale Nursery Television ... money.cnn.com 2006 03 02 real estate staging fortune index.htm Home Staging Still A Relevant Tactic ...?id a45bd818 5c68 4f0f 9dba 03d8f2a7176b Home Staging Mistakes Category Real estate terminology Category Marketing techniques cs Home staging ca Home staging de Home staging es Home staging fr Valorisation mobili re nl Verkoopstyling pl Home staging sv Homestaging ...   more details



  1. Staging (theatre)

    Unreferenced date March 2009 Staging is the process of selecting, designing, adapting to, or modifying the performance space for a Play theatre play or film . This includes the use or absence of stagecraft elements as well as the structure of the Stage theatre stage and its components. Staging is also used to mean the result of this process, in other words the spectacle that a play presents in performance, its visual detail. This can include such things as positions of actors on stage often referred to as blocking stage blocking , their gestures and movements also called stage business , the scenic background, the props and costumes, lighting, and sound effects. Besides costume, any physical object that appears in a play has the potential to become an important dramatic symbol. The first thing that the audience of a play sees is the Scenic design stage set , the physical objects that suggest the world of the play. The stage set is usually indicated by the playwright, but the degree of detail and specificity of this rendering vary from one playwright to another and from one literary period to another. In film, staging is generally called Set dresser set dressing . While from a critical standpoint, staging can refer to the spectacle that a play presents in performance, the term is also frequently used interchangeably with the term blocking , referring to how the performers are placed and moved around the stage. Many audience members may believe that performers move spontaneously on the stage, but blocking staging is rarely spontaneous. Major points of blocking are often set down by the playwright, but blocking is usually done by the director, sometimes in collaboration with performers and designers. Historically, the expectations of staging blocking have changed substantially ..., most staging used a tableau approach, in which a stage picture was established whenever characters ... there have been changing cultural expectations that have made blocking staging more complicated ...   more details



  1. B-staging

    B staging is a process that utilizes heat or UV light to remove the majority of solvent from an adhesive , thereby allowing construction to be staged. In between adhesive application, assembly and curing, the product can be held for a period of time, without sacrificing performance. Attempts to use traditional epoxy epoxies in IC packaging often created expensive production bottlenecks, because, as soon as the epoxy adhesive was applied, the components had to be assembled and cured immediately. B staging eliminates these bottlenecks by allowing the IC manufacturing to proceed efficiently, with each step performed on larger batches of product. References Advanced Packaging, http ap.pennnet.com Articles Article Display.cfm?Section Articles&Subsection Display&ARTICLE ID 234465 UV B Stage Technology Provides Process & Performance Advantages Category Semiconductor device fabrication Comp sci stub ...   more details



  1. Braak staging

    called Lewy bodies . ref name pmid18398010 According to the Braak staging Lewy bodies first appear ...   more details



  1. Disk Expert

    Orphan date April 2012 Please leave this line alone Disk Expert Disk Expert is a shareware Disk space analyzer disk usage analysis , reporting and processing utility for Mac OS X . ref name Download Disk Expert 1.0.1 from Softpedia Functionality Disk Expert scans the volumes of hard drive ref name Video review of Disk Expert and visually displays the disk space usage as a sunburst diagram. ref name Disk Expert Key Features The utility discovers the bulkiest content ref name Download Disk Expert from ... Disk Expert from OneDayOneApp The user can manage the disk content by picking up files into the special list ref name Disk Expert review by LowEndMac from which he can copy or move them to other drives ..., as well as reveal file in Finder . History Disk Expert was developed by Nektony LLC. It is a software ... speed of the disk scanning process was critical for the utility developers. Also the big attention was paid to Usability interface usability . The application was released on Dec 24, 2011. ref name Disk Expert Release References Reflist refs ref name Disk Expert Release http www.macnews.com 2011 12 22 nektony disk expert new disk space manager mac Disk Expert 1.0 Released ref ref name Disk Expert Key Features http nektony.com disk expert Disk Expert Key Features ref ref name Download Disk Expert from MacUpdate http www.macupdate.com app mac 41199 disk expert Download Disk Expert for Mac. MacUpdate ref ref name Download Disk Expert from OneDayOneApp http mac.onedayoneapp.com ?s disk expert&submit Search Disk Expert featured as Today s Mac App. OneDayOneApp ref ref name Video review of Disk Expert http www.bestmacsoftware.net maintenance review of nektonys disk expert Video review of Disk Expert. Best Mac Software ref ref name Disk Expert review by LowEndMac http lowendmac.com practical 12sw disk expert.html Disk Expert review. LowEndMac ref ref name Download Disk Expert 1.0.1 from Softpedia http mac.softpedia.com get Utilities Disk Expert.shtml Download Disk Expert 1.0.1. Softpedia ...   more details



  1. Disk cache

    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



  1. Disk Fax

    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



  1. Disk failure

    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



  1. Disk aggregation

    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



  1. Disk cartridge

    Orphan date December 2010 Unreferenced date December 2009 merge cartridge electronics date March 2012 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



  1. Disk Utility

    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



  1. Disk (mathematics)

    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 disk Disk 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



  1. Disk pack

    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 ... 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. The 14 ... vendors producing IBM compatible drives and disk packs. Examples of a hard disks with removable disk packs are the IBM magnetic disk drives IBM 1311 IBM 1311 , and the Digital Equipment Corporation Digital RP04. gallery File Fotothek df n 10 0000117.jpg Operator 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 File Disk Pack.jpg A removable pack in place 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 commons category Removable disk packs disk cartridge , History of hard disk drives DEFAULTSORT Disk Pack Category Rotating disc computer storage ...   more details



  1. Occulting disk

    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



  1. Disk swapping

    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



  1. Slice (disk)

    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




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