From: Spelic <spelic@shiftmail.org>
To: "Patrick H." <linux-raid@feystorm.net>
Cc: linux-raid <linux-raid@vger.kernel.org>
Subject: Re: filesystem corruption
Date: Wed, 05 Jan 2011 16:52:04 +0100 [thread overview]
Message-ID: <4D2493A4.9010209@shiftmail.org> (raw)
In-Reply-To: <4D247FFB.3090209@feystorm.net>
On 01/05/2011 03:28 PM, Patrick H. wrote:
> No, my drives are battery backed as well.
what drives are they, if I can ask? OCZ SSDs with supercapacitor maybe?
Do you know if they will really flush the whole write cache on sudden
power off? I read smoky sentences about this for the OCZ drives. In
certain points it seemed like the supercapacitor was only able to
provide the same guarantees of a HDD, that is, no further data loss due
to erase-then-rewrite-32K and flash wear levelling stuff, but was not
able to flush the write cache.
Did you try with e.g. a stream of simple databases transactions then
disconnecting the cable suddenly like this test
http://www.mysqlperformanceblog.com/2009/03/02/ssd-xfs-lvm-fsync-write-cache-barrier-and-lost-transactions/
?
Thank you
next prev parent reply other threads:[~2011-01-05 15:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-03 1:58 filesystem corruption Patrick H.
2011-01-03 3:16 ` Neil Brown
[not found] ` <4D214B5C.3010103@feystorm.net>
2011-01-03 4:56 ` Neil Brown
2011-01-03 5:05 ` Patrick H.
2011-01-04 5:33 ` NeilBrown
2011-01-04 7:50 ` Patrick H.
2011-01-04 17:31 ` Patrick H.
2011-01-05 1:22 ` Patrick H.
2011-01-05 7:02 ` CoolCold
[not found] ` <AANLkTinL_nz58f8rSPuhYvVwGY5jdu1XVkNLC1ky5A65@mail.gmail.com>
2011-01-05 14:28 ` Patrick H.
2011-01-05 15:52 ` Spelic [this message]
2011-01-05 15:55 ` Patrick H.
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