>Does anyone have any performance experience with the Dell Perc 5i controllers in >RAID 10/RAID 5? Check the archives for details- I posted some numbers a while ago. I was getting around 250 MB/s sequential write (dd) on Raid5x6, and about 220 MB/s on Raid 10x4 (keep in mind that's dd- RAID10 should do better for random io). Default config and pgbench I've seen io > 130MB/s read/write, which is likely due to not using the full resources of the box due to default config. I'm going to try and post some more detailed numbers when I get a chance to test the box again, but that probably won't be for a few more weeks. If anyone's interested or has comments, here's my test plan: Bonnie++ 1.03 dd pgbench (all of the above with sizes 2x RAM) against: RAID5x6 RAID5x4 RAID10x6 RAID10x4 If I get time, I'd also like to test putting pg_xlog on RAID1x2 data on RAID10x4, vs. everything on RAID10x4 and RAID10x6, since I know people have asked about this. HTH, Bucky
