On Fri, 2003-01-31 at 09:40, Greg wrote:
> Hi Benjamin,
> you were right. I should have thought of it from that point
> of view. But even when I do a hdparm test on the
> individual drives, I still get very low readings. The
> drives are both set with basically everything turned off,
> including DMA. When I try to turn it on, it still tells
> me that I am not permitted to use DMA on these drives.
> Why would that be do you think. I know what you are
> saying, regarding the trustworthyness of the results in
> real world use, but the examples of other software raid
> systems have all used the hdparm test to check results,
> and they have shown an increase in throughput over
> the single drive setup. There must be something wrong
> here??!!
> Maybe I should just forget about it, and go back to
> the normal method. I have deffinately not seen an
> improvement in speed, and can notice that it is
> slightly more sluggish at the moment. It is just strange,
> as this method is supposed to improve performance.
> regards Greg
Have you tried adding appended parameters to the kernel at bootup time?
Here's what I have appended:
<WHOMP>----------------------------------------------------------------
image=/boot/vmlinuz-2.4.18-3
label=linux
initrd=/boot/initrd-2.4.18-3.img
read-only
root=/dev/hda3
append="hdd=ide-scsi idebus=66 ide0=ata66 ide1=ata66"
<WHOMP>----------------------------------------------------------------
Then, to top that off, I modified the /etc/sysconfig/harddisks and
added:
TRANSFER_MODE=69
As well, I always, ALWAYS modify my /etc/ld.so.conf prior to getting
serious with either MDK or RH - so I make sure the lines:
/usr/lib
/usr/local/lib
...are added and then rerun "ldconfig" to rebuild the lib path cache,
and also add in my /etc/profile the following:
KDEDIR='/usr'
export KDEDIR
...and reboot.
I try to always attempt a "force" of ATA/IDE settings at kernel level,
then ya know if you can get it performing prior to the actual system
load. Once that's done (and check the messages with "dmesg") you should
be able to start mucking around with further hdparm settings.
Also some things to ask: do you have the latest video drivers for your
graphics adaptor? What file system are you using? What colour shoes do
you have on?
Cheers!
--
Fri, 31 Jan 2003 09:45:00 +1100
9:45am up 12:42, 3 users, load average: 0.11, 0.34, 0.38
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