Disk I/O - too slow?
Don Levey
fedora-list at the-leveys.us
Tue Feb 24 02:55:01 UTC 2004
On Mon, 2004-02-23 at 20:52, Alexander Dalloz wrote:
> Am Di, den 24.02.2004 schrieb Don Levey um 02:30:
> >
> > So... I've got DMA enabled, Multiple I/O, EIDE 32-bit and lookahead
> > enabled in my /etc/sysconfig/harddisks file. Running that hdparm line
> > gives me:
> >
> > /dev/hdb:
> > Timing buffer-cache reads: 1204 MB in 2.00 seconds = 601.49 MB/sec
> > Timing buffered disk reads: 96 MB in 3.00 seconds = 31.97 MB/sec
> >
> > ...clearly *not* fast. This is a Maxtor Diamond ATA 120Gb drive,
> > 7200rpm, on an ASUS A7V8X-X mb. I'm running FC1 with a 2.6.3 kernel
> > from kernel.org. Any suggestions for speeding up my I/O (or more info
> > to provide)?
> >
> > TIA, -Don
>
> Just let hands off /etc/sysconfig/harddisks.
I had been following the suggestion in Linux Journal about those
settings. Based upon the above, I re-commented the lines in question
and restarted the machine. Now I get:
/dev/hdb:
Timing buffer-cache reads: 1128 MB in 2.00 seconds = 563.80 MB/sec
Timing buffered disk reads: 110 MB in 3.08 seconds = 35.77 MB/sec
...which leads me to believe that what I had done didn't have much
effect in any event. Is this what I can expect on my machine, or is
there something else I should do?
-Don
p.s. I forgot to mention before: I'm running an AMD Athlon 2600+
(1.91GHz).
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