 | | | Hard drive failure recovery | Hard drive failure recovery 2005-03-17 - By John Haxby
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Tobias Speckbacher wrote:
>A simple way could be to use dd. Although you should have identical
>drives for that to work reliably. Takes a long time too.
>
>dd if=/dev/sda of=/mnt/nfs/someshare/sda.out
>
>
dd is a lot faster if you use a bigger block size. For disk copying I
usually use at least a megabyte -- bs=$((1024*1024)). dd's biggest
problem for copying disks is that it doesn't read and write at the same
time and every time I wind up copying a disk I threaten to write a small
program to do just that: one reader thread, one writer thread and some
buffering between them: memory is cheap, several megabytes of buffer
wouldn't go amiss.
jch
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