Solved

Raid 5 array, error on one drive

Posted on 2011-03-24
7
767 Views
Last Modified: 2012-05-11
Hello all,

So I have a 3-drive raid5 array, and I had one of the drives go into "error" status, and the other two be flagged as degraded. This is a hardware raid controller on a NVIDIA mobo. The problem occurred immediately after reboot after installing an NVIDIA Sata Controller update through windows update. (I have since rolled this driver back, error persisted)

I assume, that to fix this I simply need to reformat the one individual drive that seems to have "error" or even just run "clear disk" from the raid controller, and then select "rebuild". However, this is my first time with a raid error, and I don't want to botch it all up and loose 2TB of data! So please let me know if this is a terrible idea or if there is another way I should do it.
0
Comment
Question by:Valde_Edius
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
7 Comments
 
LVL 30

Expert Comment

by:Randy Downs
ID: 35211273
rebuild should work the way it's laid out in you manual but it's likely to be a long process. It's also possible the drive really is bad so I'd have one on hand before I kicked it off.
0
 
LVL 18

Expert Comment

by:Netflo
ID: 35211298
Hi Valde Edius,

When you get an error in a RAID array please check within the software provided by NVIDIA to verify in a little more details of what is exactly wrong. It may be a case that the RAID card has detected a SMART error that the drive is going to fail or has failed. I assure you simply formatting the drive and reinserting the drive is not the quick fix you want to attempt.

You can try to reseat the drive, by disconnecting it and reconnecting it. However please note that I would strongly recommend you have a full system backup before attempting to do anything, as you will lose all data if you break the RAID array.

Please can you check what the NVIDIA array tools report and let me know. I would also consider getting a similar replacement drive as a precautionary measure.
0
 

Author Comment

by:Valde_Edius
ID: 35211314
When I enter the Raid Utility through the BIOS, it shows me the one drive in the category Error, and the other two drives under Degraded. When I enter the error category, it says I can push [R] Rebuild [D] Delete [C] Clear Disk [ENTER] Return . I push R and it kicks me to the previous screen. So should I just clear the disk data? From my understanding of Raid-5 one drive can be completely removed and recovery can still proceed, so I doubt it needs to borrow any of the parity data from this 'error' drive, right?
0
Report: Liquid Web beats Amazon, Rackspace & More

A study by performance analyst firm Cloud Spectator finds that Liquid Web beats rivals Amazon, Rackspace and DigitalOcean when it comes to website and cloud application performance.

 

Author Comment

by:Valde_Edius
ID: 35211417
Netflo,

I do not have any NVIDIA  software pertinent to the hard drives or motherboard. I do have an NVIDIA Control Panel, but that is all for the graphics card. The hard drive array is over the hardware controller on my gigabyte motherboard. NVIDIA's website doesn't have any drivers for a gigabyte mobo, and I didn't want to chance it with this much data on the line by installing drivers for another manufacturers mobo.

I have a similar drive on hand already if this goes bad, but it belongs in another computer where I would like it to stay if it can, however this array takes priority.

I have already tried the following re-seating tricks:
Unplugged the Error drive, roboot, power down, plug back in.
Unplug both other drives, do the same thing as above
Unplug all three drives, do the same thing as before
0
 
LVL 18

Accepted Solution

by:
Netflo earned 50 total points
ID: 35211446
Without troubleshooting too much, I would recommend replacing the failed drive.

RAID 5 spreads parity across all disks in the array, so at the moment your array is running in a degraded mode, if you sustain another failure your whole array is gone.

You can always play around with the reported failed drive separately, knowing your array is safe.
0
 

Author Comment

by:Valde_Edius
ID: 35211478
Ahh, so with perity in play my data will be corrupted if this error drive turns out to fail again in the middle of recovery. Very good to know, thank you!
0
 
LVL 18

Expert Comment

by:Netflo
ID: 35211502
Key is speed, don't wait for another to blink off. Best of luck!
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The article will include the best Data Recovery Tools along with their Features, Capabilities, and their Download Links. Hope you’ll enjoy it and will choose the one as required by you.
Employees depend heavily on their PCs, and new threats like ransomware make it even more critical to protect their important data.
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question