RAID controller: 0000:03:01.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID (rev 01) It's a RAID5 with two Seagates ST3500641NS and one WD WD5000KS-00MNB0. ** Attachment added: "cpuinfo" http://librarian.launchpad.net/5513331/proc -- very high iowait - 100% https://launchpad.net/bugs/76849