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RE: ABIT BP6 & UDMA-66: Support for Debian Linux



I know this isn't helpful, but here is some additional information.  I have
a P233 with a non-UDMA66 45GB hard drive.  I get about 12MB/s.  I question
the utility of the hdparm performance.  This doesn't appear to be random
reads.  Either way, I get much better performance with Storm (based on
debian) using 2.2.16 kernel.  Maybe debian has an older kernel?

paul


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Paul McHale
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> -----Original Message-----
> From: wilson [mailto:wilson]On Behalf Of Wilson Yau
> Sent: Wednesday, June 14, 2000 7:55 PM
> To: debian-user@lists.debian.org
> Subject: ABIT BP6 & UDMA-66: Support for Debian Linux
>
>
> Hi, everyone!
>
> My system is Abit BP6 w/Dual Celeron 500MHz CPUs & 128MB PC-100 SDRAM on
> board.  One 18GB IBM UDMA-66 7200rpm HDD (master) & One 20GB IBM UDMA-66
> 7200rpm HDD (Slave) connected to the first ATA-66 channel.
>
> I frist installed the Gentus Linux (Abit's RedHat-based distribution)
> from the CD come with the main board, and both SMP and UDMA-66
> functioned at after the first boot.  (It's almost a painless
> installation - very smooth indeed.)  Execute "hdparm -t /dev/hde6" gave
> a benchmark of something like 20MB per sec (very impressive! I have
> another system running dual PIII-600 Coppermine with two 9GB SCSI HDD
> which gave a figure something like 18MB/sec)
>
> Then, I changed my mind to remove Gentus and install Debian Potato.  By
> choosing installation from floppies, I downloaded all the required image
> including the UDMA-66 patch from
>
> ftp://ftp.uk.debian.org/debian/dists/potato/main/disks-i386/2.2.15
-2000-06-07/images-1.44/udma66/

Installation was fine (the rescue disk could detect the ATA-66 HDD - no
need to swop them to ATA-33 channel during installation).  SMP was not
ready yet. Kernel had to be recompiled.  No Problem!

However, when I did "hdparm -t /dev/hde6" & "hdparm -t /dev/hdf1", this
time it gave a figure between 2 to 3 MB per sec.  Even slower than a
ATA-33 5400rpm HDD in a single PII-266 64MB RAM system.

Q.1/ Can anyone explain to me this phenomenon?

Q.2/ How to optimize my system performance (esp the UDMA-66 HDD) with
Debian Linux?

Many thanks for your help!

Wilson


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