GPT Raid 5 Recovery
Posted: Thu Aug 06, 2009 12:36 am
A quick question for the r-studio gurus:
Scenario:
4x1.5TB ICH9R raid 5 array with a single 4.1TB GPT partition went fubar after a Vista 32bit BSoD. The ICH9R BROM shows 2 of the 4 disk as "nonraid member" while the other 2 are detected correctly as members of the raid 5 array. Now there's no way to recover this with 2 missing disks.
Problem:
The OS drive is not part of the array so there's no problem loading it. I fired up r-studio and the program sees all 4 of the 1.5TB hard drives. Now I know the order of the drives and I know the stripe size but I can't seem to get the offset right. I know Vista uses a 2048 sector offset by default so I tried that... (used this offset on all 4 disks) didn't work. I took a quick look at the FAQ with raid 5 using MBR but it doesn't help me much as the partition is GPT... (I could be wrong, please correct me). So my question is, will r-studio load out the partition automatically without doing a scan if I get the order, stripe size and offset correct for a GPT partition? What if I can't get the offset; is a full scan my only option? Anyone know what the offset would be with this setup so I can try it? It's currently performing a scan right now but it's going to take a long time for 4.1TB of data...
Thanks in advance for your input.
Scenario:
4x1.5TB ICH9R raid 5 array with a single 4.1TB GPT partition went fubar after a Vista 32bit BSoD. The ICH9R BROM shows 2 of the 4 disk as "nonraid member" while the other 2 are detected correctly as members of the raid 5 array. Now there's no way to recover this with 2 missing disks.
Problem:
The OS drive is not part of the array so there's no problem loading it. I fired up r-studio and the program sees all 4 of the 1.5TB hard drives. Now I know the order of the drives and I know the stripe size but I can't seem to get the offset right. I know Vista uses a 2048 sector offset by default so I tried that... (used this offset on all 4 disks) didn't work. I took a quick look at the FAQ with raid 5 using MBR but it doesn't help me much as the partition is GPT... (I could be wrong, please correct me). So my question is, will r-studio load out the partition automatically without doing a scan if I get the order, stripe size and offset correct for a GPT partition? What if I can't get the offset; is a full scan my only option? Anyone know what the offset would be with this setup so I can try it? It's currently performing a scan right now but it's going to take a long time for 4.1TB of data...
Thanks in advance for your input.