data gone from remaining drive?

  • Thread starter Thread starter troy
  • Start date Start date
T

troy

I HAD a RAID 5 configuration with 3 drives. I lost one drive and while
I was obtaining a replacement in the mail the second drive went south!
Question:
Have I lost all my data or is it still somewhere on the remaining drive?
 
I HAD a RAID 5 configuration with 3 drives. I lost one drive and while
I was obtaining a replacement in the mail the second drive went south!
Question:
Have I lost all my data or is it still somewhere on the remaining drive?
Click to expand...

You've lost it all. RAID5 manages parity in such a manner that it can
recover from a single drive failure, not from a double.

In the future you might want to consider using a hot-spare.
 
It's gone, but you do have backups, don't you....

http://www.taobackup.com/


--
Tumppi
Reply to group
=================================================
Most learned on nntp://news.mircosoft.com
Helsinki, Finland (remove _NOSPAM)
(translations from FI/SE not always accurate)
=================================================
 
Previously [email protected] said:
I HAD a RAID 5 configuration with 3 drives. I lost one drive and while
I was obtaining a replacement in the mail the second drive went south!
Question:
Have I lost all my data or is it still somewhere on the remaining drive?
Click to expand...

You have lost 2/3 of it. The rough sequence (order nad block-size
may vary) is

Disk 1 Disk 2 Disk 3
d1 d2 (d1+d2)
d2 (d3+d4) d4
(d5+d6) d5 d6

The parity blocks are pretty worthless if you do not have
n-2 other blocks in that line.

So if you original file was <d1 d2 d3 d4 d5 d6> you now have
left on, e.g. disk 1 <d1 - d2 - - - ->. May still mean
something, but probably not much.

Arno
 
Back
Top