first of all, I don't know whether what I am about to suggest is what is
meant by "disk optimistation," but here goes:
In the console if you enter:
hdparm -t /dev/hda (where hda is a hard disk, probably the one on which you
have installed Linux) then you will get an answer after a number of seconds
showing the transfer rate which that disk has achieved.
Just doing hdparm /dev/hda with no options will show you the paramters which
the IDE controller is using for that disk
If your disk is not using DMA then try entering:
hdparm -d 1 /dev/hda and then do the -t option again. See if you get any
increase in transfer rate.
Also one worth trying is hdparm -c 1 /dev/hda which will enable 32-bit I/O.
If you find that these improve disk performance you can put them in a
combined form, i.e.:
hdparm -c 1 -d 1 -k 1 /dev/hda
at the end of /etc/rc.local. If you have more than one disk then try it on
the others as well.
***NB*** It is possible that using these commands will lead to data
corruption, although I myself have never had that experience. Also remember
that if you are using SCSI disks and not IDE your device names will be
/dev/sda, /dev/sdb etc.
There are many other hdparm options covering such things as buffer size,
block size etc. which I have to admit I don't really understand.
Chris
----- Original Message -----
From: "Wise, William M." <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, August 28, 2000 2:18 PM
Subject: [newbie] How to manually enable HD optimisations after install
> Just wondering how I would manually enable HD optimisations after
> installing and specifying during the install that they should be turned
> off.
>
> I was trying to figure out a problem I was having (turned out to be
> automount) and thought reinstalling with optimisations might do the
> trick. How can I turn them on now that I know that they weren't the
> source of my problem.
>
> Thanks in advance for any help you can provide,
> Will
>
>
