Errors with Soft RAID 5 Array, no disks off line

[vamythguy]

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[2384]: Device: /dev/sda, 3 Offline
> > uncorrectable sectors
> > Dec 31 17:04:39 tibeaux smartd[2384]: 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
>
> --
> fedora-list mailing list
> fedora-list at redhat.com
> To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>


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?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/fedora-list/attachments/20061231/07f1fec1/attachment-0001.htm>