A hard drive has failed and RAID volume is degraded

Bruce Corson
Bruce Corson used Ask the Experts™
on
I've been asked to fix a computer that is presenting me with this message. I looked inside and there are indeed two drives. If I replace drive 2, how do I get the RAID functioning again...will this happen automatically? This is Win XP.

See error message, attached.
raid-failure.jpg
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Most Valuable Expert 2015

Commented:
It depends on the RAID controller and the drives used. If it is a fake-RAID controller and the drives aren't enterprise class (both of which are very likely), it'll also be very likely that you'll have to restore from the backups, as the re-syncing of the array will fail.

So before you replace the drive, make sure you have at least one good backup. Then check the manual of the PC/Mainboard/RAID controller on how a disk replacement should be done.
Bruce CorsonPresident

Author

Commented:
What do I look for to find the PC/Mainboard/RAID controller so that I can google the manual? I have no knowledge of how this was set up.
Most Valuable Expert 2015

Commented:
If it's a PC from HP, Dell or similar, just go to the manufacturer's homepage and on their support options look for the the model number of the PC. The manual should be there somewhere.

If it's a PC built by a small shop, then open it's case and you should see some markings on the mainboard which disclose the manufacturer, and also the model number, and then again you can go to that homepage and look for the manual.

If the RAID controller is a separate card and not built into the mainboard, then you should also have markings on that card that say what it is...
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Bruce CorsonPresident

Author

Commented:
It is made by Microcenter, their brand is ProSpec. I'll check that out. Thanks.
Most Valuable Expert 2015

Commented:
Never heard of either.
Bruce CorsonPresident

Author

Commented:
rindi, the controller must be the Intel Matrix Storage Technology? I did find a control panel for that.
Commented:
Sounds like fake raid.
Intel Matrix Storage Technology should also have a pre-boot option in which you should be able to manually view the raid status before the OS loads. From here you should be able to re-sync the array.

Take a full backup including system state with ntbackup or similar, shut down, replace the drive
Distinguished Expert 2017
Commented:
Backup/clone the data. See whether the drives you have have vendor supported tools to image the data.

If the drives are not hot swappable. Make sure to note the serial of the drive that is reflected as bad within the control panel tool.
Replace the failed drive. On boot the rebuild of the array might be automatic.
If it is hot swappable, see whether there is an option to eject the drive from the array, pop and replace.

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