Date: Thu, 28 Apr 2005 17:34:55 -0700 From: Peter Losher <Peter_Losher@isc.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-performance@freebsd.org Subject: Re: Very low disk performance Highpoint 1820a Message-ID: <4271812F.4060808@isc.org> In-Reply-To: <06ba01c54bff$8c5aed00$7f06000a@int.mediasurface.com> References: <06ba01c54bff$8c5aed00$7f06000a@int.mediasurface.com>
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[-- Attachment #1 --] Steven Hartland wrote: > 5.4-STABLE Highpoint 1820a RAID 5 ( 5 disk ) > dd if=/dev/da0 of=/dev/null bs=64k count=10000 > 10000+0 records in > 10000+0 records out > 655360000 bytes transferred in 13.348032 secs (49097875 bytes/sec) Have you tried the driver supplied by Highpoint as a pre-compiled kernel module? I have a 1820A with 4x400GB Hitachi SATA disks (RAID5 + 1 Hot Spare) in a system running 5.3-RC3/amd64, where I have to use the kernel module, and I get almost double the speed that you have: -=- % dd if=/dev/da0 of=/dev/null bs=64k count=10000 10000+0 records in 10000+0 records out 655360000 bytes transferred in 7.775190 secs (84288614 bytes/sec) -=- Best Wishes - Peter -- Peter_Losher@isc.org | ISC | OpenPGP 0xE8048D08 | "The bits must flow" [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCcYEvPtVx9OgEjQgRAlF+AKCQT6REpmtZFXzBE2jJnaRLJcyxHwCgsmVS NXe3yLTwG2fg2KAwK7+41HE= =MoJJ -----END PGP SIGNATURE-----
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