From: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
---|---|
To: | Ow Mun Heng <ow(dot)mun(dot)heng(at)wdc(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: OT - 2 of 4 drives in a Raid10 array failed - Any chance of recovery? |
Date: | 2009-10-20 08:41:40 |
Message-ID: | dcc563d10910200141t26ed75d2ge015825f56e7b2b1@mail.gmail.com |
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Thread: | |
Lists: | pgsql-general |
On Tue, Oct 20, 2009 at 1:11 AM, Ow Mun Heng <ow(dot)mun(dot)heng(at)wdc(dot)com> wrote:
> Sorry guys, I know this is very off-track for this list, but google hasn't
> been of much help. This is my raid array on which my PG data resides.
>
> I have a 4 disk Raid10 array running on linux MD raid.
> Sda / sdb / sdc / sdd
>
> One fine day, 2 of the drives just suddenly decide to die on me. (sda and
> sdd)
>
> I've tried multiple methods to try to determine if I can get them back
> online.
>
> 1) replace sda w/ fresh drive and resync - Failed
> 2) replace sdd w/ fresh drive and resync - Failed
> 3) replace sda w/ fresh drive but keeping existing sdd and resync - Failed
> 4) replace sdd w/ fresh drive but keeping existing sda and resync - Failed
>
>
> Raid10 is supposed to be able to withstand up to 2 drive failures if the
> failures are from different sides of the mirror.
>
> Right now, I'm not sure which drive belongs to which. How do I determine
> that? Does it depend on the output of /prod/mdstat and in that order?
Is this software raid in linux? What does
cat /proc/mdstat
say?
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