On 14/12/17 18:57, Warren Young wrote: > On Dec 13, 2017, at 5:15 PM, J Martin Rushton > <martinrushto...@btinternet.com> wrote: >> >> # dd if=/dev/sdc of=/home/dd-copy-of-sdc > > Better, use ddrescue: > > https://www.gnu.org/software/ddrescue/ > > dd will do unfortunate things like quit early on I/O errors, even if later > blocks would read just fine. ddrescue assumes the input file is dodgy and > tries to cope. > Looks interesting. I've only used dd in anger, and then only maybe 3 or 4 times over the last 20 years. It's worth pointing out that ddrescue is not in the main distro, you'll need to get it from EPEL.
Whatever method you use though: "Be diligent because every time a physically damaged drive powers up and is able to output some data, it may be the very last time that it ever will." (ddrescue manual section 9)
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