Way to figure out data discs going bad.

[Michael Simpson]

On 12/11/08, Walters, Mark <Mark.Walters at mckesson.com> wrote:
>
> I've always used:
>
> # dd if=/dev/sdb of=/dev/null bs=512
>

dd can choke at the first bad block
i use ddrescue for this instead

# ddrescue /dev/sda /dev/null /var/disclog

it will continue through errors and the above command will give you a
list of errors in a logfile

<http://linux.die.net/man/1/ddrescue>

mike