Thread (18 messages) 18 messages, 5 authors, 2014-08-06

Re: On URE and RAID rebuild - again!

From: Gionatan Danti <hidden>
Date: 2014-07-31 07:16:24

Yes, you can usually get your data back with mdadm.

With latest code, a URE during recovery will cause a bad-block to be recorded
on the recovered device, and recovery will continue.  You end up with a
working array that has a few unreadable blocks on it.

NeilBrown
This is very good news :)
I case of parity RAID I assume the entire stripe is marked as bad, but 
with mirror (eg: RAID10) only a single block (often 512B) is marked bad 
on the recovered device, right?

 From what mdadm/kernel version the new behavior is implemented? Maybe 
the software RAID on my CentOS 6.5 is stronger then expected ;)

Regards.

-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@assyoma.it - info@assyoma.it
GPG public key ID: FF5F32A8
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