Joshua Baker-LePain wrote: I seem to have maxed out at approximately 275mb/sec on writes and about 200mb/sec on reads with the following configuration:
Dual opteron 275's 2gb RAM (4 x 512mb) 3Ware 9550SX w/8 ports 8 x 750gig barracudas (RAID 0) 2 x 80gig seagates for the OS ncq off 9550 set to "performance" rather than "balanced" on the storsave or whatever that parameter was called ext3 file system with "blockdev --setra 16384" <-- great find! CentOS 4.4 64-bit
I'm too chicken/paranoid/etc to fiddle with XFS since I'm cpu bound most of the time (encoding/fondling uncompressed video). At some point, I'll switch the array over to RAID5 so there is some sort of safety net, but right now I'm working with play data so it doesn't really matter.
3Ware's site seems to point to 300+MB/Sec with 8 disks so it sounds like you're close. Read speed seems low. As I said, enabling memory interleaving on my motherboard and setting the drives to 3GB/Sec made a big difference.
8x750 Gig! I still remember when a friend bought his first 512MB drive and I asked him what he was going to do with all that space! Of course that was long before any thought of video on a PC...
Kirk BOcek