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软件名称: ddrescue
授权方式: GPL
操作系统: Linux,FreeBSD,UNIX
软件大小: 103K
最新更新: 2012-06-25 22:54:05
软件简介:

GNU ddrescue 是一个数据恢复工具。它可以将一个数据复制到一个文件或设备中(硬盘,CD-ROM,等),且能够从错误读取的情况下抢救数据。GNU ddrescuelog 是一个处理ddrescue日志文件的工具,显示日志文件的内容,可以将日志文件转换到其他格式,比较日志文件,并且可以删除日志文件。


GNU ddrescue is a data recovery tool. It copies data from one file or block device (hard disc, cdrom, etc) to another, trying hard to rescue data in case of read errors.
Ddrescuelog is a tool that manipulates ddrescue logfiles, shows logfile contents, converts logfiles to/from other formats, compares logfiles, tests rescue status, and can delete a logfile if the rescue is done. Ddrescuelog operations can be restricted to one or several parts of the logfile if the domain setting options are used.

The basic operation of ddrescue is fully automatic. That is, you dont have to wait for an error, stop the program, read the log, run it in reverse mode, etc.

If you use the logfile feature of ddrescue, the data is rescued very efficiently, (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point.

Ddrescue does not write zeros to the output when it finds bad sectors in the input, and does not truncate the output file if not asked to. So, every time you run it on the same output file, it tries to fill in the gaps without wiping out the data already rescued.

Automatic merging of backups: If you have two or more damaged copies of a file, cdrom, etc, and run ddrescue on all of them, one at a time, with the same output file, you will probably obtain a complete and error-free file. This is so because the probability of having damaged areas at the same places on different input files is very low. Using the logfile, only the needed blocks are read from the second and successive copies.

Ddrescue recommends lzip for compression of backups, because of its reliability and data recovery capabilities, including error-checked merging of backup copies. The combination ddrescue + lziprecover is the best option for recovering data from multiple damaged copies.

Recordable CD and DVD media keep their data only for a finite time (typically for many years). After that time, data loss develops slowly with read errors growing from the outer media region towards the inside. Just make two (or more) copies of every important CD/DVD you burn so that you can later recover them with ddrescue.

The logfile is periodically saved to disc. So in case of a crash you can resume the rescue with little recopying.

Also, the same logfile can be used for multiple commands that copy different areas of the file, and for multiple recovery attempts over different subsets.

Ddrescue also features a "fill mode" able to selectively overwrite parts of the output file, which has a number of interesting uses like wiping data, marking bad areas or even, in some cases, "repair" damaged sectors.

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ddrescue-1.0.tar.bz2
ddrescue-1.11.tar.gz
ddrescue-1.2.tar.bz2
ddrescue-1.3.tar.bz2
ddrescue-1.5.tar.bz2
ddrescue-1.6.tar.bz2
ddrescue-1.8.tar.bz2
ddrescue-1.9.tar.bz2
ddrescue-1.12.tar.gz
ddrescue-1.13.tar.gz
ddrescue-1.14.tar.gz
ddrescue-1.15.tar.gz
ddrescue-1.16.tar.gz

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