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'