Hello there,
The most possible reason is that the drive is not “clean”. To be available for storage spaces, the disk shouldn’t have any volume or partition on it and better be a raw drive.
Please provide more information:
- Is there any change before the problem happened? Such as hardware replacement, and software installation?
- Is there any 3rd party protection/anti-virus tool?
- Please check the System event in Event Viewer to confirm if there is any related event has been logged.
If you run Reset-PhysicalDisk on a physical disk that appears as lost communication or split, it attempts to re-integrate the disk into the storage pool if the target disk is discoverable. After resetting the disk, use Repair-VirtualDisk to recover its resiliency.
If you run Reset-PhysicalDisk on a disk that isn’t a part of a storage pool, it will clear any lingering storage space data and metadata on the disk.
Hope this resolves your Query !!
--If the reply is helpful, please Upvote and Accept it as an answer–
problem is solved.
first, Removed-VirtualDisk, then
Removed-StoragePool, then
3 disks in the pool listed in Get-PhysicalDisk AND CanPool=True, one other disk was marked in Disk Management as still in the non-existent pool and also didn't show in Get-PhysicalDisk. then i used DiskPart to Clean it and then it showed in Get-PhysicalDisk & CanPool=True. then i rebuilt the pool and restored the backed up data.
i'm thinking while the pool was alive any disks previously attached were protected. the protection was giving me a pain.