on Fri, May 13, 2005 at 03:35:26PM -0500, Jay Strauss ([EMAIL PROTECTED]) wrote: > Hi, > > I just installed Sarge on an old PPro 180Mhz, with / on a RAID1 device > and everything else on RAID1/VG/LVGs (which is very easy using the new > Debian installer). I'm building this machine to be an offsite backup > machine.
Note that that's about 2.8 MiB/s net rate, if I'm doing my math right. Depending on what-all else is going on, that's not _too_ unreasonbly slow, though it's not blazingly fast either. Disk contention? > It took 10hrs to sync my 100GiB partition, the first time, which seems a > bit slow. Can you define "sync"? Are you rsyncing one system to another? Locally/remotely? Simply running 'sync'? or what? If you're doing anything which requires significant CPU usage (say, compression or encryption), that PPro's going to be relatively pokey. > I'm using 2 Seagate Barracuda 7200.7 ST3160021A 160GB 7200 RPM IDE > Ultra ATA100 Hard Drive drives, each as the master on separate > controllers (one of the drives has a CD as a slave) > Googling, I've found a couple of tests like: > > time dd if=/dev/hda of=/dev/null bs=64k count=10000 > > which takes like 55 seconds (it only takes roughly 25 seconds on various > other machines I have including an old P133) > > I also ran: hdparm -tT /dev/hda, as described in the windows thread by > Karsten, and it came in at 28 MB/s Decent, not great. > - Does the processor speed have anything to do with I/O performance? Not directly. Processor speed on blocking tasks (encryption, find/sort, compression, decompression) can, however. > - What other tests might I run to prove it's slow? You've hit most of it. Clarifying just what you were doing would be helpful. I ran across a bad disk (IIRC Maxtor) which was netting ~100 *KiB*/s last year. This was sufficiently slow that network operations were notably lagged. I confirmed speed issues w/ hdparm and swapped it out for a faster drive for much better performance (60-80 MiB/s). Peace. -- Karsten M. Self <[email protected]> http://kmself.home.netcom.com/ What Part of "Gestalt" don't you understand? I sincerely believe people talk about me. Mine would be a pretty meaningless existance if they didn't.
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