Solved

Raid 10 failure

Posted on 2010-08-15
3
901 Views
Last Modified: 2016-12-08
We have a server that has a Raid 10 with four 250GB WD drives.  After installing some updates, the server was restarted; however, it did not come back up.  It indicates "no OS".  When we go into the raid manager, it indicates three drives as "offline" and one as "unavailable".  When we try to create a new raid, it indicates there is not enough HD space. What should we do to get the OS back online?
0
Comment
Question by:half_techical
3 Comments
 
LVL 2

Accepted Solution

by:
MaxterJF earned 450 total points
ID: 33443134
It would be useful to know what raid hardware you are using...

We had a couple of issues with RAID and the main issue is about the HD faillling but the SMART doesn't detect the fail so all the drives mirrored get corrupted.  

But let's talk about your RAID 10.  First of all, I suggest you trying these steps to know if you will be able to recover something:

Remove one of the 2 STRIPE volume (Remove the one with the "Unavailable drive".
Boot the PC and go into your RAID config.
If you don't get a STRIPE online stop the PC and insert the other stripe and go back to the RAID config.
If you get one STRIPE online, then at least you will be able to recover the data to put on another stripe.
If not, I suggest you try with another RAID adapter.  

For the "unavailable" drive, you could do a hardware check on it to be sure the drive is safe with the WD disk verification tool that you can find on their website.

Anyway, those kind of issues almost always shows a trouble with the RAID adapter. Seeing a complete RAID 10 OFFLINE is not normal.
0
 
LVL 12

Assisted Solution

by:geowrian
geowrian earned 50 total points
ID: 33443138
The "offline" drives are probably not being seen by the card. The "unavailable" drive may be in an error state (i.e. starting to fail). I would identify the "unavailable" drive and remove it, then go into the raid manager and try to bring the other 3 drives online. However, there is a chance of data loss, the drive controller having a failure, etc.
0
 

Author Comment

by:half_techical
ID: 33863542
we were never able to see the drives so we are restoring from backup.
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

The 6120xp switches seem to have a bug when you create a fiber port channel when you have a UCS fabric interconnects talking to them.  If you follow the Cisco guide for the UCS, the FC Port channel will never come up and it will say that there are n…
this article is a guided solution for most of the common server issues in server hardware tasks we are facing in our routine job works. the topics in the following article covered are, 1) dell hardware raidlevel (Perc) 2) adding HDD 3) how t…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

813 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

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now