From: Andreas Peter <ujq7@rz.uni-karlsruhe.de>
To: linux-kernel@vger.kernel.org
Subject: Re: SW-RAID0 Performance problems
Date: Sat, 14 Apr 2001 11:38:06 +0200 [thread overview]
Message-ID: <01041411380600.00516@debian> (raw)
In-Reply-To: <Pine.LNX.4.10.10104131048550.1669-100000@coffee.psychology.mcmaster.ca> <01041318282003.00665@debian> <20010414000433.F4557@greenhydrant.com>
In-Reply-To: <20010414000433.F4557@greenhydrant.com>
Am Samstag, 14. April 2001 09:04 schrieb David Rees:
> OK, so it's not the RAID setup. There's two things that can cause this.
> One is that DMA is turned off (what does hdparm /dev/hda and hdparm
> /dev/hdc show?), the second was that the drives are on the same channel
> (which obviously isn't the case here). Can you verify that the drives are
> in DMA mode?
hdparm /dev/hda
/dev/hda:
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 59556/16/63, sectors = 60032448, start = 0
the same on /dev/hdc
I played with different hdparm-settings, but it's not possible to speed up
the HDs
Andreas
--
Andreas Peter *** ujq7@rz.uni-karlsruhe.de
next prev parent reply other threads:[~2001-04-14 9:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.10.10104131048550.1669-100000@coffee.psychology.mcmaster.ca>
2001-04-13 15:36 ` SW-RAID0 Performance problems Andreas Peter
2001-04-13 16:07 ` David Rees
2001-04-13 16:28 ` Andreas Peter
2001-04-14 7:04 ` David Rees
2001-04-14 9:38 ` Andreas Peter [this message]
2001-04-14 12:28 ` Kurt Roeckx
2001-04-14 13:09 ` Andreas Peter
2001-04-13 18:11 ` Tim Moore
2001-04-14 10:45 ` Andreas Peter
2001-04-13 11:47 Andreas Peter
2001-04-13 16:01 ` Jakob Østergaard
2001-04-13 16:28 ` Andreas Peter
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