From: "Majed B." <majedb@gmail.com>
To: Linux Raid Study <linuxraid.study@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Raid5 Read stats for parity cal...
Date: Thu, 17 Sep 2009 03:20:19 +0300 [thread overview]
Message-ID: <70ed7c3e0909161720r5a068ca4m8335cfbbd51bc220@mail.gmail.com> (raw)
In-Reply-To: <f5d1f90a0909161713s2f31e3b4t34a4ee285b83ef8e@mail.gmail.com>
You can force an array check by writing "check" (without double
quotes) to a file named "sync_action" found in /proc/sys
Read this for further details: http://linux.die.net/man/4/md
You can run that check at any time, not just when there's a problem.
On Thu, Sep 17, 2009 at 3:13 AM, Linux Raid Study
<linuxraid.study@gmail.com> wrote:
> Hello:
>
> I understand that parity calculations are not done as part of Raid5
> read operation in normal running conditions.
>
> However, it would be done during disk failure or when a sector is bad.
> Is there a way (any stats) available to see if parity cal are done
> when sector is bad (since this is not as obvious as a disk fail...)
>
> Thanks!
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--
Majed B.
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next prev parent reply other threads:[~2009-09-17 0:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-17 0:13 Raid5 Read stats for parity cal Linux Raid Study
2009-09-17 0:20 ` Majed B. [this message]
2009-09-17 2:38 ` Neil Brown
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