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From: "leon j. breedt" <ljb@neverborn.org>
To: linux-kernel@vger.kernel.org
Subject: ASUS P4PE spurious hdparm -tT results...UPDATE
Date: Wed, 2 Apr 2003 17:17:55 +1200	[thread overview]
Message-ID: <20030402051755.GA3281@riven.neverborn.ORG> (raw)

hi,

i'm still getting the same weird negative test
results for the WDC WD800JB-00CRA1 drive on 2.4.21-pre6:

/dev/hda:
 Timing buffer-cache reads:   -3008 MB in  0.00 seconds =  -inf kB/sec
 Timing buffered disk reads:  -1504 MB in  0.00 seconds =  -inf kB/sec
Hmm.. suspicious results: probably not enough free memory for a proper test.

however...i noticed that when i booted up with kernel 2.4.20-xfs_pre6 
(the Gentoo 1.4rc3 LiveCD kernel), i didn't get strange test results.

the difference between the two seemed to be that the 2.4.20-xfs_pre6 kernel
initialized the drive in mdma2 mode, and didn't support udma5 for the
IDE layer in that version of the kernel. so maybe this is a bug that's
crept in since 2.4.21 and better ICH4 support days?

the IDE layer in that version of the kernel is based on a version from
www.linuxdiskcert.org, i'm not sure how different that is from the
version Alan & c have been working on.

any ideas what may cause this, for just the WDC drive and not the IBM?
both are on the same channel..

thanks,
leon.

                 reply	other threads:[~2003-04-02  5:06 UTC|newest]

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