From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 14831] mptsas - Use of ATA command pass-through results in
unreliable operation - drive / controller resets
Date: Mon, 24 May 2010 09:05:14 GMT
Message-ID: <201005240905.o4O95EfA017205@demeter.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=3D14831
dujun@perabytes.com changed:
What |Removed |Added
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CC| |dujun@perabytes.com
--- Comment #25 from dujun@perabytes.com 2010-05-24 09:05:10 ---
https://bugzilla.kernel.org/show_bug.cgi?id=3D16021=20
we have a similar problem which I described in above bug report. Ryan t=
old me
about this patch work and I have it tested in our system. It seems that=
it
works, and the md raid rebuild speed is around 60MB/s for 16 hdd.=20
However, the dd speed for when raid 5 is rebuiding is much less than or=
iginal
result. Around 150MB/s for write compared with almost 400MB/s without t=
he
patch. 600MB/s for read compared with 800MB/s.=20
Is this caused by the bounce buffer for the alignment?=E3=80=80Is there=
any way to
solve this problem in lsi formware so that we don't need a forced align=
ment?=20
We will test the software raid grow problem reported by Brian later.
--=20
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