MultiDrive – free backup, clone & wipe disk utility from Atola Technology

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Raid 10 (0+1) recovery problems
PostPosted: January 18th, 2010, 13:07 
Offline

Joined: January 18th, 2010, 12:54
Posts: 2
Location: Berlin
Hello community!

I have a very serious problem with my RAID and hope someone here can help.

At first my specs:

I am running Windows 7 64bit on a PC with the ASUS P7P55D Mainboard and five 1TB hard drives. Four of them were striped and mirrored in one RAID 10. The remaining drive was used as the system disc.
This morning an error popped up while I was booting, stating that one of the drives went offline. I restarted in order to have a look at the RAID-BIOS and from then on Windows didn't boot anymore.
It just couldn't find the system disc and three of the four RAID discs were offline.

So I checked all the cables and eventually exchanged the system disc and reinstalled windows. Now I can boot the system but still can't access the RAID.

When I disconnect the drives 3 and 4 the remaining two are recognized as functioning RAID member discs. I thought I might be able to restore one of the two RAID-0s this way but that didn't work because in Windows it's shown as one partition and not as several independent drives.

There is still another option. Deleting the RAID and setting it up again and then run a recovery. But that seems a bit too risky to me because all my work stuff is on that friggin thing.

Any advice which software to use or other hints about what might possibly work?

Any help is appreciated, I'm kinda lost here.

Thanks!


Top
 Profile  
 
 Post subject: Re: Raid 10 (0+1) recovery problems
PostPosted: January 18th, 2010, 14:30 
Offline

Joined: October 13th, 2008, 7:29
Posts: 1493
You should clone all 4 disks before you do anything.

Connect all disks then identify which disks are the RAID 0. Use software such as Winhex. You can slo use winhex to rebuild the RAID manually, then extract the data to another hard drive.

You need to idenify disk order, starting sector (usually 0) and block size.


Top
 Profile  
 
 Post subject: Re: Raid 10 (0+1) recovery problems
PostPosted: January 19th, 2010, 4:11 
Offline

Joined: December 27th, 2006, 10:15
Posts: 1852
Location: Belgium
By any chance these disks are Seagate 7200.11 series ? Then it could be the firmware problem.

Dobre

_________________
Murphy was an optimist

Datarecovery in Belgium, Holland, France and Germany
Datarecoverytools http://www.drtools.eu


Top
 Profile  
 
 Post subject: Re: Raid 10 (0+1) recovery problems
PostPosted: January 19th, 2010, 5:49 
Offline

Joined: January 18th, 2010, 12:54
Posts: 2
Location: Berlin
No they are not. But last night I managed to fix the problem :D

If somebody happens to have the same problem, here is what I did:

As described above I replaced the system hard drive with a new one and reinstalled Windows because it didn't boot at all.

By unplugging all the raid discs and reconnecting them I finally found out that one drive seemed to be the cause of all problems. So I went to the store, got a new one and replaced it. Now the system wouldn't boot anymore again. So I disconnected the new drive and booted with three of the four raid drives.

When Windows was up I connected the last drive and set it as replacement in the Intel Raid software thing.

So the raid mounted and I backed up all data over night onto an external disc.

I still had to reinstall Windows because somehow my system disc wasn't recognized as bootable anymore but now it works smoothly again.

Thanks for your help!


Top
 Profile  
 
 Post subject: Re: Raid 10 (0+1) recovery problems
PostPosted: January 19th, 2010, 9:11 
Offline

Joined: October 13th, 2008, 7:29
Posts: 1493
seems like you didnt need our help afterall.


Top
 Profile  
 
 Post subject: Re: Raid 10 (0+1) recovery problems
PostPosted: January 19th, 2010, 11:57 
Offline
User avatar

Joined: February 9th, 2009, 16:13
Posts: 2574
Location: Ontario, Canada
The problem with this scenario is when it doesn't work. It is so frustrating trying to recover from a failed RAID array after the client has shuffled drives in and out and attempted to rebuild multiple times. To help, we provide a low cost service to mirror each drive in a RAID (assuming that they are healthy) and set them aside while the client takes the originals back to play. If they succeed with their efforts, they have only paid us a couple hundred dollars for the peace of mind. If they fail, we can move forward and recover from the clones without having to deal with any extra problems.

_________________
Luke
Recovery Force Data Recovery


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 40 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group