My original build thread here http://forums.overclockers.com.au/showthread.php?t=957083& 6x2TB Hitachi drives in RAID-Z2 I fired up my ZFS box to backup some files the other night, and I could not get it to go I troubleshooted for a bit, and it seems to be a possibly dodgy video card causing the issue. For some reason with this particular motherboard, if there is no video card present, the PC will not actually boot properly in the background past a certain point. I took the card out, put it back in. Voila! Working again. I was about 8 BIOS versions behind, so I decided I'd do an upgrade. This seemed to fix problems I had with the USB auto-booting, so all good as far as I'm concerned. Now... I'm not sure if this is just PURE COINCIDENCE... but once I booted into FreeNAS (embedded), I was greeted with a nasty ZFS pool = DEGRADED.. It looks like one of the drives is "unavailable". I had a look through the serial numbers that FreeNAS could see, and cancelled them all out until I was left with one missing drive/serial number. I've physically marked the drive with a paint marker so I know which one it is. It seems a bit odd to me that this has just suddenly happened. I thought for a moment it might be a problem with one of the onboard SATA controllers, however there is another drive on the controller that is working fine. (6 ports in total, 4 on one controller, 2 on another). I tried bringing the unavail drive online using "zpool online mypoolsname weirdlongnumbershowingup", doesn't seem to work. Anyone have any ideas? further steps/checks I can do? Does it sound like the drive is simply dead and needs to be swapped out? or perhaps something is bugging out? Your opinions and help greatly appreciated Click to view full size! Click to view full size! Click to view full size!