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RAID 10 Problem

Posted on 2010-11-16
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Last Modified: 2012-05-10
Greetings,

Please see the image located at...

http://www.screencast.com/users/TPreston/folders/Jing/media/f1358857-d346-4d8b-ace9-8ccba04cc9a2

Array_0000 is a RAID 10 array. The fourth disk in the array (SN: 0708) has a status of "Missing," yet the drive is also displayed as an independent drive (Internal Disk) with a status of "Normal." On boot up, the BIOS indicates (in bright red letters) that drive 0708 is an "Offline Member."

After receiving this message, I downed the server and replaced drive 0708 with a new drive. But when I attempted to start the server, I received the "Missing Operating System" error and the server would not boot. I then removed the new drive and returned drive 0708 back to its rightful place...so we are up and running. But I would very much like to resolve this problem.

I should also mention that when I click on the "Internal Disk" (drive 0708 with the "Normal" status), there is an option to "Clear and Reset" the disk. But online Help indicates that doing so will "permanently delete existing metadata" on the disk. And since I can't even boot the server without that disk, I'm hesitant to do that.

Has anyone here encountered this problem and, if so, how can I safely resolve this?

Thanks,
Tom
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Question by:Bad_Fish
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Expert Comment

by:rjwesley
ID: 34148385
Does your Intel RAID controller have the Rebuild Checkpoint Failure feature?

Is there an option to rebuild anywhere?

What's the RAID Controller product number?


Rob
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Author Comment

by:Bad_Fish
ID: 34148585
To the best of my knowledge, it has no Rebuild Checkpoint Failure feature. And no, the only "option" I see is "Clear and Reset Disk" (on the Internal Drive).

The RAID controller is the Intel ESB2 SATA RAID Controller.
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Author Comment

by:Bad_Fish
ID: 34148979
For the sake of clarity, I'm including two more screen shots. This one shows the status of the errored drive...

http://www.screencast.com/users/TPreston/folders/Jing/media/497387c1-4bfb-4945-88cd-2161e86a187b

And this one shows the status of the "Normal" drive...

http://www.screencast.com/users/TPreston/folders/Jing/media/bab615e2-89fb-4760-a04f-afb6275bf3bf

Thanks for your assistance...hope this helps.
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LVL 8

Expert Comment

by:rjwesley
ID: 34149538
I don't believe the Clear and reset Disk will make a difference, because that from what I've read will only return the disk to a normal state, which it is in already.

Is the model number of your new drive and failed drive identical? I'm just thinking that if the drive is of a slightly different model then that could be the source of your problem. A potential solution might be to upgrade the firmware on your RAID controller BUT call Intel to confirm. My first thought was to attempt the Clear and Reset disk option which I would do but not without first having a BACKUP in place.

Does Array_0000 have the OS on it?

I'd of course strongly suggest while in an operative state to ensure full backups are carried out.

Ok I don't like this RAID controller!!

This is what I would do if say I inherited this server and if certain resources were in place. I'd buy another server that has a better RAID solution and storage capacity required. The RAID would be RAID 1 with hotspare and perhaps another RAID1 with hotspare on another controller. I'd transfer all necessary server items and user files. Then glady take that server out of production.

Rob
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Author Comment

by:Bad_Fish
ID: 34150499
Yes, the OS is on this disk...but I thought the whole purpose of RAID was redundency...and the ability to salvage things...like an OS.

Really? There's no way to "fix" this other than building a new server? What about the other three drives in the array? Shouldn't they also have the OS? There must be a solution.
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Accepted Solution

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Bad_Fish earned 0 total points
ID: 34151148
Thank you for the help but I found the solution. The server BIOS set the newly installed drive at a higher boot priority than the RAID volume. After replacing the drive (again), I corrected the boot priority and that solved it.

Thank you again for your help, Rob.
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Author Closing Comment

by:Bad_Fish
ID: 34182505
After researching the problem, I found the solution at the Intel website.

http://www.intel.com/support/chipsets/imsm/sb/CS-021234.htm.
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