From: Chuck Ebbert <76306.1226@compuserve.com>
To: Stephan van Hienen <raid@a2000.nu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: tuning disk on 3ware /performance problem
Date: Sun, 6 Apr 2003 11:29:00 -0400 [thread overview]
Message-ID: <200304061131_MC3-1-333A-E630@compuserve.com> (raw)
> Is there anything i can do to tune the drives connected to he 3ware
> controller ? (37MB/sec vs 43MB/sec) (and why is the seq. output block
> 65MB/sec on the 3ware vs 41MB/sec on 'ide controllers')
Try doing a real test with a 1 GB file on an empty filesystem:
# mount /fs && date
# time dd if=/dev/zero of=/fs/file1 bs=128k count=8k
# umount /fs && date && mount /fs
# time dd if=/fs/file1 of=/dev/null bs=128k
I get numbers that disagree with hdparm by a large amount.
--
Chuck
I am not a number!
next reply other threads:[~2003-04-06 15:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-06 15:29 Chuck Ebbert [this message]
2003-04-06 15:56 ` Stephan van Hienen
2003-04-06 18:55 ` dean gaudet
2003-04-06 18:58 ` dean gaudet
-- strict thread matches above, loose matches on Subject: below --
2003-04-06 14:20 Stephan van Hienen
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