From: Folkert van Heusden <folkert@vanheusden.com>
To: Anton Ertl <anton@mips.complang.tuwien.ac.at>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Out-of-order writing by disk drives
Date: Fri, 17 Apr 2009 23:07:01 +0200 [thread overview]
Message-ID: <20090417210700.GD10554@vanheusden.com> (raw)
In-Reply-To: <E1LrHX3-0003u5-2G@a4.complang.tuwien.ac.at>
> I have released a new version of hdtest, a program that tests whether
> hard disks write out-of-order relative to the order that the writes
> were passed to them from the OS. You find the program at
> http://www.complang.tuwien.ac.at/anton/hdtest/
Not sure if it matters but it seems open-iscsi (both target and
initiator are linux systems) works fine with respect to the write
barriers: while running hdtest on an iscsi device I suddenly stopped the
traffic flowing using an iptables DROP-rule. Then of course I stopped
the iscsi initiator, removed the rules, restarted the initator and ran
hdcheck: all above the line have the correct magic.
Folkert van Heusden
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next prev parent reply other threads:[~2009-04-17 21:07 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-07 20:04 Out-of-order writing by disk drives Anton Ertl
2009-04-14 14:10 ` Andi Kleen
2009-04-14 16:33 ` Anton Ertl
2009-04-14 17:24 ` Andi Kleen
2009-04-14 17:40 ` Mark Lord
2009-04-14 17:48 ` Michael Tokarev
2009-04-14 17:54 ` Andi Kleen
2009-04-14 18:09 ` Michael Tokarev
2009-04-14 18:50 ` Andi Kleen
2009-04-14 19:27 ` Chris Mason
2009-04-15 12:46 ` Jens Axboe
2009-04-17 19:46 ` Folkert van Heusden
2009-04-17 20:29 ` Andi Kleen
2009-04-17 21:07 ` Folkert van Heusden [this message]
2009-04-18 9:06 ` Anton Ertl
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