Raid 5 unallocated disk after failure

[britac]

Help please:
I have a raid 5 (nvidia) with 4 disks that I believe had a brief controller failure. The events were as follows: a warning stating critical drive access failure (or Similar), but system carried on working. I was copying a large file to the raid array which was partioned as 3 drives shared on my home network. Sometime later I noticed the machine had hung up. On reseting the Raid Bios reported that all the drives had degraded. In the past when a similar event occurred and one drive degraded, I deleted that drive and then reassembled the arraywhich then instigated a rebuild and all was well.

So I deleted the array and re asembled rebuilt, but no data, The drive does not appear in windows, but on examination using the diskmanager the array is there but as an allocated disk space with no partitions 839GB.

I have run ZAR using the default conditions for a single disk but the data found was all corrupted.

Have I LOST EVERY THING? Help appreciated. I am running winxp 64bit

[Alexey V. Gubin]

If you done a proper rebuild of a RAID5, rebuilding parity data, then I'd say it is beyond repair. How long did it took to rebuild? Full parity rebuild of 1TB should take several hours.

[britac]

Hi Thanks for response:
The rebuild did not take very long, an hour or so.

[Alexey V. Gubin]

I guess I was a bit off in my guess.

Without any load, 839GB per 1 hour translates to 1400 MB/minute, about 23 MB/sec; any modern drive is capable of sustaining that rate, so I assume that was a full rebuild.

Just in case, could you please locate the log file, C:\Program files\ZAR\logfile.txt, ZIP it and email it to development@z-a-recovery.com

[Alexey V. Gubin]

I've checked it and unfortunately it is beyond repair. The full rebuild of a RAID5 commenced with wrong settings destroys the array pretty well.

[britac]

Thanks for your efforts. I am sure the software will come in usefull sometime