I'll chuck my drives and config into the list: 5QM2S***:ST3500320AS:9BX154-303:SD15:unknown:unknown:SUZHSG:JAN09:N\A:OEM:seannyc:United Kingdom:running_fine - removed after 1 day due to this thread\Antec EarthWatts 500 5QM2N***:ST3500320AS:9BX154-303:SD15:unknown:unknown:SUZHSG:JAN09:N\A:OEM:seannyc:United Kingdom:running_fine - removed after 1 day due to this thread\Antec EarthWatts 500 5QM2T***:ST3500320AS:9BX154-303:SD15:unknown:unknown:SUZHSG:JAN09:N\A:OEM:seannyc:United Kingdom:running_fine - removed after 1 day due to this thread\Antec EarthWatts 500 5QM2T***:ST3500320AS:9BX154-303:SD15:unknown:unknown:SUZHSG:JAN09:N\A:OEM:seannyc:United Kingdom:running_fine - removed after 1 day due to this thread\Antec EarthWatts 500 Now these drives are slightly different to the rest having been manufactured in SUZHSG and being 5QM. They were running fine - they only ran for 1 day in a RAID 10 before I took them out though. They're shelved. I'm not sure if these drives may fair any better but I certainly wasn't about to find out in a server... I may set them up on an Ubuntu box copying large amounts of data and rebooting to see what they do. Also, thanks to this thread, I've realised why a FreeNAS I built keeps falling over - it has some retail 9QM ST3500320AS drives installed in a mirrored RAID. It's been stumping me for ages but this *must* be the cause since people have reported instabilities with RAID and these drives. I'll try and get the unknown data for the 5QM drives, the 9QMs might not be so easy because they're running at a remote site.