Azure Stack HCI Storage Preperation

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# Retrieving the disc statistics (not only suitable for S2D)
Get-Disk

# Remove StoragePools and Reset Disks
Update-StorageProviderCache
Get-StoragePool | ? IsPrimordial -eq $false | Set-StoragePool -IsReadOnly:$false -ErrorAction SilentlyContinue
Get-StoragePool | ? IsPrimordial -eq $false | Get-VirtualDisk | Remove-VirtualDisk -Confirm:$false -ErrorAction SilentlyContinue
Get-StoragePool | ? IsPrimordial -eq $false | Remove-StoragePool -Confirm:$false -ErrorAction SilentlyContinue
Get-PhysicalDisk | Reset-PhysicalDisk -ErrorAction SilentlyContinue

# Physical Option

# Disk - Preparation for S2D operation
Get-Disk | ? Number -ne $null | ? IsBoot -ne $true | ? IsSystem -ne $true | ? PartitionStyle -ne RAW | % {
        $_ | Set-Disk -isoffline:$false
        $_ | Set-Disk -isreadonly:$false
        $_ | Clear-Disk -RemoveData -RemoveOEM -Confirm:$false
        $_ | Set-Disk -isreadonly:$true
        $_ | Set-Disk -isoffline:$true
    }
    
# Virtual Option

Get-Disk | ? FriendlyName -eq "Msft Virtual Disk" | ? Number -ne $null | ? IsBoot -ne $true | ? IsSystem -ne $true | ? PartitionStyle -ne RAW | % {
        $_ | Set-Disk -isoffline:$false
        $_ | Set-Disk -isreadonly:$false
        $_ | Clear-Disk -RemoveData -RemoveOEM -Confirm:$false
        $_ | Set-Disk -isreadonly:$true
        $_ | Set-Disk -isoffline:$true
    }

# Retrieving the disc statistics (S2D-capable only)
Get-Disk | ? Number -ne $null | ? IsBoot -ne $true | ? IsSystem -ne $true

# Retrieving the number of different hard disk types
Get-Disk | Where Number -Ne $Null | Where IsBoot -Ne $True | Where IsSystem -Ne $True | Where PartitionStyle -Eq RAW | Group -NoElement -Property FriendlyName

# Determination of disc usage
Get-PhysicalDisk

As you can see there are disks with the usage description "Auto-Select" and "Journal". Journal are the disks selected for caching.

Attention, this is an unsupported scenario.

References: