On Fri, 2 Jul 1999, Jean-Louis Debert wrote:
> Tom Fawcett wrote:
> > I recently installed Mandrake 6.0. Shortly thereafter I started noticing
> > hard disk problems that I couldn't explain, including filesystem corruption
> > and I/O errors. I've had no problems with my disks before this. I
> > eventually tracked down the problem to this code in /etc/rc.d/rc.sysinit:
> >
> > # Optimisation of Hard drive.
> > if [ -x /sbin/hdparm ];then
> > LIST_HD=$(grep '^hd.*' /var/log/dmesg|\
> > grep -ivE '(CD.*ROM|FLOPPY|TAPE|STATUS)'|cut -d: -f1|sort|uniq)
> > for i in $LIST_HD;do
> > action "Starting Hard Drive optimisations for $i" \
> > hdparm -q -c1 -q -A1 -q -m16 -q -d1 /dev/$i
> > done
> > fi
> > Given this warning, these settings seems like strange and bad defaults. At
> > least I should be able to turn off these optimizations without having to
> > move the hdparm executable, and I'd argue that rc.sysinit shouldn't be
> > trying to optimize my hard disk at all since it doesn't know what it's
> > dealing with. If I were a Linux newbie I'd probably never have figured out
> > what was going on.
> >
> > Comments?
>
> I can confirm that these settings are probably not well chosen, and
> _did_
> perform incorrectly on my machine (AMD K6/300, VIA MVP3, IBM UDMA/33
> HD).
> Although I did not catch any file corruption, the settings from the
> above
> consistently gave me around 6M/s in hdparm -t -T, whereas the HD and the
> chipset, when properly configured, give me around 10M/s (UDMA/33).
> Also, the script above tried also to run the same optimization string
> on /dev/hdc, which on my system is a cdrom !!! (well, not quite,
> actually
> it's a dvd-rom, but seen by Linux as a cdrom drive).
> When the script was running, I got errors (0x50 on the HD and 0x58 on
> the DVD drive) followed by a reset of the IDE interface, after which
> all appeared to run, but without DMA on either the HD or the DVD (both
> support DMA, and of course the MVP3 chipset does too).
>
>
> I only had to comment out the script to get back UDMA/33 for the HD and
> DMA support for the DVD, with corresponding performance improvement.
>
>
> --
> Jean-Louis Debert [EMAIL PROTECTED]
> 74 Annemasse France
> old Linux fan
>
Try this on that MVP3 board you should see vast improvements
--
# Optimisation of Hard drive.
if [ -x /sbin/hdparm ];then
LIST_HD=$(grep '^hd.*' /var/log/dmesg|\
grep -ivE '(CD.*ROM|FLOPPY|TAPE|STATUS|DVD)'|cut -d: -f1|sort|uniq)
for i in $LIST_HD;do
action "Starting Hard Drive optimisations for $i" \
hdparm -d1 -u1 -X66 /dev/$i
#^ I get another 5mb vs. useing 33
done
fi
--
No resets no coruption
Model=Maxtor 90576D4, FwRev=WAS8283C, on an atrend ATC-5220
