Poor disk drive performance with FC3 RC3
David Zeuthen
david at fubar.dk
Thu Nov 4 18:59:48 UTC 2004
On Thu, 2004-11-04 at 13:40 -0500, Steffen Persvold wrote:
> What is the purpose of the "haldaemon" and why is it destroying my
> system performance ?
>
hal polls for media change on your optical drive; is your optical
drive /dev/hdb by any chance? E.g. on the same cable as /dev/hda - I've
had reports yesterday about hdparm giving bad numbers in this case.
Basically hal does this (every two seconds)
open("/dev/hdc", O_RDONLY|O_NONBLOCK|O_EXCL|O_LARGEFILE) = 0
ioctl(0, CDROM_DRIVE_STATUS, 0x7fffffff) = 1
close(0)
Can some kernel person comment on why this is killing performance on
the /dev/hda harddrive when the optical drive at /dev/hdb is polled?
Cheers,
David
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