Try to repair the storage space using an elevated PowerShell shell.

One needs first to retrieve the names of the physical and virtual disks :

Get-PhysicalDisk
Get-VirtualDisk

Assuming that the friendly name of a failed physical disk is PhysicalDisk-1 and the virtual disk is named Prod1 Virtual Disk (the first command may be superfluous here) :

Set-PhysicalDisk –FriendlyName 'PhysicalDisk-1' –Usage Retired
Repair-VirtualDisk –FriendlyName 'Prod1 Virtual Disk'
Remove-PhysicalDisk –FriendlyName 'PhysicalDisk-1'

Try to repair the storage space using an elevated PowerShell shell.

One needs first to retrieve the names of the physical and virtual disks :

Get-PhysicalDisk
Get-VirtualDisk

Assuming that the friendly name of a failed physical disk is PhysicalDisk-1 and the virtual disk is named Prod1 Virtual Disk (the first command may be superfluous here) :

Set-PhysicalDisk –FriendlyName 'PhysicalDisk-1' –Usage Retired
Repair-VirtualDisk –FriendlyName 'Prod1 Virtual Disk'
Remove-PhysicalDisk –FriendlyName 'PhysicalDisk-1'

The problem seems to resist all standard repair methods. It therefore becomes necessary to recover the data and rebuild from scratch.

Below are three free RAID data recovery products :

• EaseUS Data Recovery Wizard Free
  Recover up to 2GB for free.

• Disk Drill for Windows
  Free data recovery within 500MB.

• MiniTool Power Data Recovery
  Free on a non-server version of Windows.