From: "3tcdgwg3" <3tcdgwg3@prodigy.net>
Cc: 'Linux raid mailing list' <linux-raid@vger.kernel.org>,
Paul Clements <Paul.Clements@SteelEye.com>
Subject: Software RAID level performance
Date: Thu, 6 Nov 2003 23:29:39 -0800 [thread overview]
Message-ID: <001d01c3a500$e99bf100$bb601e43@neptune> (raw)
In-Reply-To: 3ED7BF97.BAB11B12@SteelEye.com
Hello,
I have a question regarding the RAID1 performance.
I tought the RAID1 will access disk in a con-current way, but
today I installed a 2.4-18 (Redhat 9.0). Seems RAID1 code
is not doing the disk access in a balanced way? I see single disk
is faster the RAID1.
First, do dd, read from /dev/zero write to disk,
then dd again, read from disk write write to /dev/null,
in both cases, single disk out run 2 disk RAID1.
Any one can help me to understand this?
Thank you so much.
next prev parent reply other threads:[~2003-11-07 7:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-30 18:28 Software RAID level 1 issue Brian Schwarz
2003-05-30 18:40 ` Robert L. Harris
2003-05-31 17:44 ` Stef Telford
2003-05-30 20:01 ` Paul Clements
2003-05-30 20:12 ` 3tcdgwg3
2003-05-30 20:31 ` Paul Clements
2003-06-02 18:10 ` 3tcdgwg3
2003-06-02 18:16 ` Paul Clements
2003-11-07 7:29 ` 3tcdgwg3 [this message]
2003-05-31 19:39 ` Stef Telford
2003-05-30 21:44 ` Robert L. Harris
2003-05-30 22:04 ` Paul Clements
2003-05-30 23:32 ` Robert L. Harris
2003-05-31 20:21 ` Gregory Leblanc
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