From: Chris Friesen <chris_friesen@sympatico.ca>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: software raid issues -- possible kernel I/O problem?
Date: Fri, 07 Dec 2001 17:39:53 -0500 [thread overview]
Message-ID: <3C114539.62A0D8E7@sympatico.ca> (raw)
In-Reply-To: <3C11358D.28400117@sympatico.ca>
A number of people have privately pointed out that hdparm -T doesn't
actually go to the disk at all. Guess I should RTFM...I though that
this was reading from the disk's cache, not linux's cache. Oops.
I'm still kind of curious why raid-1 reads don't seem to get any
performance increase over reads from a single disk. Any ideas?
Chris
next prev parent reply other threads:[~2001-12-08 22:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-07 21:33 Chris Friesen
2001-12-07 22:39 ` Chris Friesen [this message]
2001-12-09 19:19 ` Jakob Østergaard
2001-12-09 19:32 ` Roy Sigurd Karlsbakk
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