dd_rescue

dd_rescue helps when nothing else can: your disk has crashed and you
try to copy it over to another one. While standard Unix tools like cp,
cat, and dd will "abort" on every I/O error, dd_rescue does not.
dd_rescue has many other goodies; optimization by using large blocks
as long as no errors are in sight and falling back to small ones; reverse
direction copy; splice in-kernel zerocopy; O_DIRECT support; preallocation
with fallocate().
dd_rescue also provides data protection features by overwriting files
or disks with fast random numbers, optionally multiple times.
dd_rescue supports plugins; currently a hash, an lzo and a crypt plugin
exist, supporting on the fly hash/HMAC calculation/validation, lzo
de/compression and de/encryption. The lzo plugin is packaged in the
dd_rescue-lzo, the crypt plugin in the dd_rescue-crypt subpackage.

          

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License: GPL-2.0-only OR GPL-3.0-only
URL: http://www.garloff.de/kurt/linux/ddrescue/