Typing recover at the DOS command-line invoked the program file RECOVER.COM or RECOVER.EXE (depending on the DOS version). recover proceeded under the assumption that all directory information included on a disk or disk partition was hopelessly corrupted, but that the FAT and non-directory areas might still contain useful information (though there might be additional bad disk sectors not recorded in the FAT).
The program removed all subdirectories and all entries in the root directory, and then created new files with names such as "FILE0001.REC" in the root directory, corresponding to the valid allocation chains that were found in the FAT area (excluding disk clusters that were tested and found to have hardware errors). A formerly bootable disk would no longer be bootable after recover had executed. The range of circumstances in which recover was genuinely useful was quite limited, and well-meaning DOS users sometimes created havoc by running recover under the misconception that it was a file undelete utility.[3]
In DOS version 5, another mode of operation was added: specifying a single filename on the command line would cause the program to test all the disk sectors used to store the file, and shorten the file by omitting sectors which tested bad.[4]
DR DOS 6.0 includes an implementation of the recover command.[5] The command is also available on SISNE plus[6] and IBMOS/2.[7] The FreeDOS version was developed by Imre Leber and is licensed under the GPL.[8]
John Paul Mueller (2007). Windows Administration at the Command Line for Windows Vista, Windows 2003, Windows XP, and Windows 2000. John Wiley & Sons. ISBN978-0470165799.
External linksedit
Wikibooks has a book on the topic of: Guide to Windows Commands
recover | Microsoft Docs
Open source RECOVER implementation that comes with MS-DOS v2.0
January 05, 2024
recover, command, this, article, uses, bare, urls, which, uninformative, vulnerable, link, please, consider, converting, them, full, citations, ensure, article, remains, verifiable, maintains, consistent, citation, style, several, templates, tools, available, . This article uses bare URLs which are uninformative and vulnerable to link rot Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style Several templates and tools are available to assist in formatting such as reFill documentation and Citation bot documentation September 2022 Learn how and when to remove this template message In computing recover is a primitive file system error recovery utility 1 included in MS DOS IBM PC DOS versions prior to DOS 6 0 2 and a number of other operating systems recoverOriginal author s Chris PetersDeveloper s Microsoft IBM Digital Research Novell Imre LeberInitial release1983 40 41 years agoWritten inMS DOS x86 assembly languageOperating systemMS DOS PC DOS SISNE plus OS 2 eComStation ArcaOS Windows DR DOS FreeDOSPlatformCross platformTypeCommandLicenseMS DOS MITFreeDOS GPLWebsitedocs wbr microsoft wbr com wbr en us wbr windows server wbr administration wbr windows commands wbr recover Contents 1 Overview 2 See also 3 References 4 Further reading 5 External linksOverview editTyping recover at the DOS command line invoked the program file RECOVER COM or RECOVER EXE depending on the DOS version recover proceeded under the assumption that all directory information included on a disk or disk partition was hopelessly corrupted but that the FAT and non directory areas might still contain useful information though there might be additional bad disk sectors not recorded in the FAT The program removed all subdirectories and all entries in the root directory and then created new files with names such as FILE0001 REC in the root directory corresponding to the valid allocation chains that were found in the FAT area excluding disk clusters that were tested and found to have hardware errors A formerly bootable disk would no longer be bootable after recover had executed The range of circumstances in which recover was genuinely useful was quite limited and well meaning DOS users sometimes created havoc by running recover under the misconception that it was a file undelete utility 3 In DOS version 5 another mode of operation was added specifying a single filename on the command line would cause the program to test all the disk sectors used to store the file and shorten the file by omitting sectors which tested bad 4 DR DOS 6 0 includes an implementation of the recover command 5 The command is also available on SISNE plus 6 and IBM OS 2 7 The FreeDOS version was developed by Imre Leber and is licensed under the GPL 8 See also editChkdsk Scandisk Norton Utilities List of DOS commandsReferences edit Recover Restore damaged data Windows CMD SS64 com MS DOS 5 0 Internal and External Commands support microsoft com Archived from the original on 2007 02 06 http www drsolly com story macedpcp art text file DOS 5 User s Guide by Dan Gookin 1991 ISBN 1 55851 188 1 p 602 DR DOS 6 0 User Guide Optimisation and Configuration Tips SISNE plus Referencia Sumaria Datassette JaTomes Help OS 2 Commands www jatomes com Archived from the original on 2019 04 14 FreeDOS 1 2 Updates Package recover FreeDOS Base Ibiblio org 2004 02 07 Retrieved 2022 09 04 Further reading editCooper Jim 2001 Special Edition Using MS DOS 6 22 Third Edition Que Publishing ISBN 978 0789725738 Kathy Ivens Brian Proffit 1993 OS 2 Inside amp Out Osborne McGraw Hill ISBN 978 0078818714 John Paul Mueller 2007 Windows Administration at the Command Line for Windows Vista Windows 2003 Windows XP and Windows 2000 John Wiley amp Sons ISBN 978 0470165799 External links edit nbsp Wikibooks has a book on the topic of Guide to Windows Commands recover Microsoft Docs Open source RECOVER implementation that comes with MS DOS v2 0 Retrieved from https en wikipedia org w index php title Recover command amp oldid 1119499643, wikipedia, wiki, book, books, library,
