Raid disk configuration for InnoDB

I try to find out best raid configuration for InnoDB MySQL engine. I have 1 server for test with Adaptec 2130SLP raid controller + 6 SCSI 15k HDD. If somebody have benchmark data - please share it for comparison.

In general we recommend to use RAID 10 for MySQL data directory, and also please ensure that BBU is properly installed and cache write policy is write-back.