Date: Tue, 22 Apr 2003 12:01:14 -0500 From: Josh Paetzel <friar_josh@webwarrior.net> To: questions@freebsd.org Subject: Disk Performance Issues Message-ID: <20030422170114.GG37008@ns1.webwarrior.net>
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I've got a FreeBSD 4.8-STABLE system with a Maxtor 6L040J2 ATA/133 7200 RPM
IDE OS drive in it on a gigabtye GA-7VRXP motherboard. I've also got a pair
of Western Digital WD800BB 7200 RPM ATA/100 drives in RAID 1 on an onboard
Promise 20276 ATA/133 RAID Controller.
atacontrol reports that all the drives are being properly probed:
===root@markx ('tty') /storage/os_isos -> atacontrol mode 0
Master = UDMA133
Slave = ???
===root@markx ('tty') /storage/os_isos -> atacontrol mode 1
Master = PIO4
Slave = PIO4
===root@markx ('tty') /storage/os_isos -> atacontrol mode 2
Master = UDMA100
Slave = ???
===root@markx ('tty') /storage/os_isos -> atacontrol mode 3
Master = UDMA100
Slave = ???
My issue is that I'm seeing sustained transfer rates on 600-700 meg files in
the 5-6 Meg/second range...about 1/4 of what the drives are capable of. Does
anyone have any advice on where to go from here in troubleshooting this issue?
TIA,
Josh
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