Re: Drive access very slow
From: Robert M. Riches Jr. (spamtrap42_at_verizon.net)
Date: 05/19/04
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Date: Wed, 19 May 2004 17:13:49 GMT
In article <slrncamstn.44r.mgass@localhost.localdomain>, Michael Gass wrote:
> Installed Red Hat 9 on a Pentium III (733 Mhz) with 256 ram.
> Dual boot set up with Windows 98 on hda1. The linux boot up is
> very slow - around 20 mins. (Windows 98 boots up and runs normally).
> Once linux is up it is very slow - just bringing up vi takes
> around 40 seconds - even at the console and without X running.
>
> I think that hdparm might indicate the problem. ...
>
> hdparm
>
> /dev/hda:
> multcount = 16 (on)
> IO_support = 0 (default 16-bit)
> unmaskirq = 0 (off)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 1292/240/63, sectors = 19541088, start = 0
First, back up any important data, just in case. (Of
course, you're already regularly backing up any important
data, anyway. Right?)
Next, use 'man hdparm' to find the syntax for the options.
Use the hdparm command to enable DMA (-d 1, IIRC). If the
system is still slower than it should be (how to judge
that?) you might want to increase the multcount and/or the
readahead.
If you find the system time-of-day clock slows down
excessively when doing heavy disk access, you might want to
_try_ unmaskirq. However, if I understand correctly, there
is some risk of system instability and/or crashes if the
hardware and/or firmware can't handle it.
Finally, edit file /etc/sysconfig/harddisks to make those
changes permanent. Unfortunately, I don't know the syntax
for the file other than the obvious entries self-documented
in the file. You might find syntax in how-to documents
and/or on Google.
Good luck.
Robert Riches
spamtrap42@verizon.net
(Yes, that is one of my email addresses.)
- Previous message: Kerry Cox: "rebuilding the comps and rpmdb-redhat source rpms"
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