On Aug 9, 2006, at 11:56 AM, Bucky Jordan wrote:
Here’s the hardware:
2xDual Core 3.0 Ghz CPU (Xeon 5160- 1333Mhz FSB, 4 MB shared cache per socket)
8 GB RAM (DDR2, fully buffered, Dual Ranked, 667 Mhz)
6x300 10k RPM SAS drives
Perc 5i w/256 MB battery backed cache
Is the PERC 5/i dual channel? If so, are 1/2 the drives on one channel and the other half on the other channel? I find this helps RAID10 performance when the mirrored pairs are on separate channels.
Your transfer rate seems pretty good for Dell hardware, but I'm not experienced with SAS drives to know if those numbers are good in an absolute sense.
Also, which driver picked up the SAS controller? amr(4) or aac(4) or some other? That makes a big difference too. I think the amr driver is "better" than the aac driver.