Thursday, October 17, 2013
Just had to post this one, after a narrow escape:
LESSON: ALWAYS BACK UP YOUR DATA BEFORE UPDATING BIOS FIRMWARE!
While diagnosing some sleep/wake issues on an ASUS P8H77-I motherboard, I was forced to update the BIOS. While this is pretty easy on the Asus boards, Be aware that sometimes a BIOS update can wipe the Intel RAID controller configuration!
Looking at the RAID management screen in the BIOS it was obvious that two of the 4 RAID-5 disks had somehow been marked as 'non-RAID' and therefore were not members of the set anymore.
All may not be lost however, if you encounter this, and you know your RAID disks are good - in other words they were ok before the update, then you could try this:
- Boot into the RAID config (CTRL-I on my board)
- DELETE the RAID configuration [just wipes the RAID sig on the disks]
- CREATE a NEW RAID configuration of EXACTLY THE SAME SETTINGS as before
Windows will still not recognise the partition I discovered but you can recover this using TESTDISK:
- Download TestDisk
- Start it up, and let it scan for partitions
- you should see your missing volume within seconds.
- Stop the scan (unless you have more AWOL volumes)
- Write the partition signature
- Reboot again.
Data was restored 8-)
More details here:
ALWAYS BACK UP YOUR DATA BEFORE UPDATING BIOS FIRMWARE!
[Your experience may vary from the above, but I felt it was worth posting that this worked flawlessly for me]