Hi. We are using a HP DL 380 G5 with 4 sas-disks at 10K rpm. The controller is a built in ciss-controller with 256 MB battery-backed cache. It is partitioned as raid 1+0. Our queries are mainly selects. I will get four 72 GB sas-disks at 15K rpm. Reading the archives suggest raid 1+0 for optimal read/write performance, but with a solid raid-controller raid 5 will also perform very well when reading. Is the ciss-controller found in HP-servers a "better" raid-controller compared to the areca-raid-controller mentioned on this list? -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org