Hi. I got a new server to install (been a while since we had new hardware here...). Compaq DL380 G3. Smart Array 5i Controller with 48 MB battery backed up cache and 6 disks configured as follows: 2 x 18 GB - RAID1 - System/pagefile - C: 2 x 36 GB - RAID1 - SQL data - D: 2 x 36 GB - RAID1 - SQL log - E: 4-5 databases will be divided on the SQL disks. D: and E: will be formated with allocation unit size of 8192 bytes instead of default 4096. Read/Write cache is 50%/50%. Initial tests with the sqliostress tool on a standard installation gives: 256 MB DB - 3555 writes/s - 29.5 MB/s average 1024MB DB - 3137 writes/s - 26.0 MB/s average But I guess the cache effects this alot. I'll do some test without cache as well. How does the array stripe size come into play here. What would be the best configuration here for SQL. I'm looking for really good write performance. By default the array stripe size is 128 KB. Valid options are 8, 16, 32, 64, 128, 256.