Errors with Soft RAID 5 Array, no disks off line
vamythguy at gmail.com
Mon Jan 1 02:11:02 UTC 2007
On 12/31/06, Pedro Fernandes Macedo <webmaster at margo.bijoux.nom.br> wrote:
> vamythguy wrote:
> > I have a 4 disk soft RAID-5 array and I'm receiving a ton of these
> > messages in the system logs:
> > Dec 31 17:04:38 tibeaux smartd: Device: /dev/sda, 3 Offline
> > uncorrectable sectors
> > Dec 31 17:04:39 tibeaux smartd: Device: /dev/sdd, 48 Currently
> > unreadable (pending) sectors
> > Best way to fix this, or is it not a problem?
> It is a problem. This means that both drives are starting to develop bad
> sectors. Since you have raid 5, you can replace the disk and let the
> array rebuild itself. Or keep using those disks, but add a hot spare
> disk to the array.
> I usually replace the disks as soon as I see smartd complain about them,
> but if you wait too much , you risk loosing your data.. Last time I
> replaced a disk in such condition, it had over 1600 uncorrectable
> sectors, making it impossible to transfer the data to the new disk via
> DD, pvmove, cp... Luckily it was just a proxy/gateway/vpn server, so a
> reinstall wasnt difficult.
> Pedro Macedo
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> fedora-list at redhat.com
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I suspected as much. Two questions:
1) Do the different messages imply they are dieing in different ways?
2) Is there any way to salvage either drive, maybe by quarantining the bad
sectors or something?
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