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December 5th, 2018 05:00
RAID-10 Failure
I have a customer with a failed RAID-10 array in a T110-ii. I am not sure if Disk0 failed or if the configuration is corrupt, and apparently Drive 1 is degraded.
Here is the RAID info:
Showing the RAID config, note Drive0:
Raid details, no Drive0, one drive is "missing":
Is there a way to get Drive 0 back into the array? Should it be replaced first? Obviously, Drive 1 should be replaced, but I would like to get back to some stability before changing too much.
As an alternative, and I am by no means an expert, since this is Raid-10 (striped data across mirrored pairs), is there a way to bring back up as either a striped or mirrored volume using the two good disks?
Any other options or suggestions are greatly appreciated. I have a Windows Backup of the system, but am not 100% confident, given the state of the configuration.
Thanks in advance!
Daniel My
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December 5th, 2018 10:00
Hello
A rebuild is only possible if the virtual disk is in a degraded state. If the virtual disk is failed/offline then a rebuild is not possible. There are very few recovery options with the H200. PD1 and 2 are both predictive failure, they should both be replaced. You can re-seat PD0 and run diagnostics on it to test the disk.
It looks like 3 of 4 disks in the RAID 10 are online according to your pictures, I can't tell for sure though. The virtual disk status is failed, so I'm assuming the data is inaccessible and the VD is offline. The only recovery option I can think of on an H200 is to perform a scan/resync. Retagging and forcing disks online are the only other recovery options I can think of, and retagging is not supported on the H200 since it forces an initialization. I don't think force online is available either, but you can check the physical disk operations to see if it is available.
http://www.dell.com/storagecontrollermanuals/
Thanks