siis/atacam/ata/gmirror 8.0-BETA3 disk performance

[James R. Van Artsdalen]

Derek (freebsd lists) wrote:
> I get about 40MB/s read, and 30MB/s write.  See attached
> bench-*.txt files.

That's too slow.  As I posted on July 31 I got sustained read rates of
875 MB/s across ten disks, through two 3124 cards and four port multipliers.

The system I tested was a dual processor Opteron 244 (1.8 GHz) running
amd64.  Perhaps more important, my disk controllers were on two
different PCI-X buses with ample bandwidth (100 MHz 64-bit and 133 MHz
64-bit).

Is your disk controller on a PCI bus, and is there any other PCI traffic
at the time?