Bruno Wolff III wrote:
On Sun, Aug 27, 2006 at 09:54:08 -0400,
Kanwar Ranbir Sandhu <m3freak@xxxxxxxxxx> wrote:
On Sat, 2006-26-08 at 14:01 -0700, Wolfgang S. Rupprecht wrote:
Aug 26 13:16:15 arbol smartd[2284]: Device: /dev/sdb, 3 Currently unreadable (pending) sectors
Aug 26 13:16:15 arbol smartd[2284]: Device: /dev/sdb, 3 Offline uncorrectable sectors
I'm at a loss as to how to proceed here. (Or is smartd reporting a
problem that occurred in antiquity and I need to somehow acknowledge
this to the disk and let it clear an error flag?)
I've been getting a similar error for a few months:
smartd[2602]: Device: /dev/hda, 1 Offline uncorrectable sectors
Nothing else appears to be wrong with the hard drive. Googling for the
error message didn't help me to understand what it means. I've just
been hoping it doesn't turn into something worse.
I know that doesn't help, but I thought I would let you know you're not
alone.
The disk isn't going to do anything with the bad sectors until you either
get a good read or write over them. If you do that then the disk may either
not doing anything further or it may remap the sector to a spare depending
on whether or not it thinks the problem is permanent.
If you are running a raid 1 mirror you can copy the sectors from the mirror
using dd (you probably want to use direct flag). To be a bit safer fail
out the bad drive (this should be doable under any raid option but 0), write
over the blocks to clear the errors (this can take a couple of tries if the
problem is permanent but the drive thinks it might be permanent) and then add
it back into the raid set.
What is the purpose of writing over the blocks here? Doesn't the
addition of the drive back into the set cause it to get re-written anyway?
Paul.
