On Tue, Mar 19, 2002 at 06:18:36PM -0500, Justin wrote:
> FWIW i get the same thing ..
>
> some of my raid1 arrays tend to become U_ after a few months
> of light use. Rebooting the box allows the device to be
> addressable again, and the disk is not, in fact, bad ..
>
> I can do a complete dd to the "bad" disk without error, then
> raidhotadd it back in again as well. A few months later of
> uptime, it is U_ again..
Can you complete a dd *from* the bad disk ?
It's common to see bad blocks on a disk, the raid dropping the
disk, and then after a full dd to the disk everything is back
to normal. This happens because the disk can re-allocate the
bad blocks during writes, whereas a read from a bad block
will fail.
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