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List:       evms-devel
Subject:    Re: [Evms-devel] After resync, RAID1 become degraded
From:       Mike Tran <mhtran () us ! ibm ! com>
Date:       2006-11-29 15:16:32
Message-ID: 456DA450.9060508 () us ! ibm ! com
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Michael Yao wrote:
> Hi,
>
> I created a RAID1 by two new disks and it starts resyncing.
> For a while I checked its status, md becomes degraded.
> Then I used the faulty disk in windows, it works fine.
>
> Can anyone tell me WHY?
> Can I prevent this if I use Bad Block Replacement feature?
> Any help is appreciated, thanks.
>   

Please use BBR on the faulty disk. If the initial resync aborts again,
the disk has too many bad sectors. It is possible that Windoz had not
done any I/O on the bad sectors so that the disk appeared OK. Whereas
software RAID resync is performed on the whole disk.

-- Mike T.




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