WSS - Repair RAID volume which create from Windows Disk Manager
If the RAID volume create from Windows Disk Manager and confirmed the NAS hardware & HDD is fine or repaired, we could refer to following link from Microsoft for repair process:
https://docs.microsoft.com/en-us/windows-server/storage/disk-management/troubleshooting-disk-management
or
https://docs.microsoft.com/en-us/windows-server/storage/disk-management/troubleshooting-disk-management#a-dynamic-disks-status-is-offline-or-missing
If the RAID volume create from Windows Disk Manager and confirmed the NAS hardware & HDD is fine or repaired, we could refer to following link from Microsoft for repair process:
https://docs.microsoft.com/en-us/windows-server/storage/disk-management/troubleshooting-disk-management
or
https://docs.microsoft.com/en-us/windows-server/storage/disk-management/troubleshooting-disk-management#a-dynamic-disks-status-is-offline-or-missing