on Thu, Jul 08, 2004 at 07:28:19AM -0700, Richard Weil ([EMAIL PROTECTED]) wrote:
> --- "Karsten M. Self" <[EMAIL PROTECTED]> wrote: > > I'm trying to find out why my disk performance is so slow -- 150x > > worse than a comperable system -- and what I can do to improve it. > > > > I've got a system with a painfully slow disk. The worse as it's > > serving as a Samba server for a small domain (ten workstations). > > Saturated 802.1g WiFi is disk-starved presently. System response > > under any I/O load is glacial. 'top' routinely reports load > > averages of from 2 to 10+ with 99% idle CPU. Memory utilization is > > generally nominal, and was *not* an issue in the tests below, though > > disk performance pretty much precisely sucked. <...> > If this isn't a problem that suddenly manifested itself, I don't believe it is, though I didn't take measurements right at the start. It's certainly been slow for a couple of months, though just how bad wasn't readily apparent until I really looked at it. The system itself is hardly older than that. > it might be the ide cable to the drive. If you're talking about the 40 vs. 80 conductor drive cables, it's the latter. That's among the first things I checked last night. > I had a drive running slowly (a Maxtor, too) and just got a big > improvement in it's performance by using a new cable. I got a round > ATA133 cable for $4.00 and the drive's performance radically improved. This is flat 80-conductor cable. > I knew it was the cable, though, because the drive had been running > fast in a nearly identical system with the only real difference being > the cable. Also, though you probably know more about than I do, the -I > flag of hdparm is pretty useful for info. Trying to interpret all of that, but yeah. > Richard Thanks. > > The results may be seen at: > > > > http://linuxmafia.com/~karsten/slow-drive/ > > > > Comparative results for a fast system similarly configured (but > > different HW) is at > > > > http://linuxmafia.com/~karsten/slow-drive/fast-drive.tar.gz Peace. -- Karsten M. Self <[EMAIL PROTECTED]> http://kmself.home.netcom.com/ What Part of "Gestalt" don't you understand? Curses, like chickens, come home to roost.
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