So here’s the scenario you need or want to figure out which LUN is which on your cluster…

Yesterday I posted a script which used Get-ClusterParameter and the Physical Disk Private Properties to gather information on the storage being used by the cluster – as promised here’s a less verbose version of that script…

Script

Import-Module FailoverClusters
$csv1 = Get-ClusterSharedVolume Cluster_CSV1_IBMXIV
$csvParams = Get-ClusterParameter -InputObject $csv1
$DiskUniqueIds = ($csvParams | Where-object -FilterScript {$_.Name -eq "DiskUniqueIds"}).Value

$CountOfIdentifiers = $DiskUniqueIds[8]

$currentArrayIndex = 12
for($a = 0; $a -lt $CountOfIdentifiers; $a++)
{
    $CodeSet = $DiskUniqueIds[$currentArrayIndex]
    $Length = $DiskUniqueIds[$currentArrayIndex+8]
    $NextOffset = $DiskUniqueIds[$currentArrayIndex+10]
    
    switch ($DiskUniqueIds[$currentArrayIndex+4])
    {
    0 {Write-Host "StorageIdType: VendorSpecific";break}
    1 {Write-Host "StorageIdType: VendorId";break}
    2 {Write-Host "StorageIdType: EUI64";break}
    3 {Write-Host "StorageIdType: FCPHName";break}
    4 {Write-Host "StorageIdType: PortRelative";break}
    5 {Write-Host "StorageIdType: TargetPortGroup";break}
    6 {Write-Host "StorageIdType: LogicalUnitGroup";break}
    7 {Write-Host "StorageIdType: MD5LogicalUnitIdentifier";break}
    8 {Write-Host "StorageIdType: ScsiNameString";break}
    }
    
    switch ($DiskUniqueIds[$currentArrayIndex+12])
    {
    0 {Write-Host "StorageIdAssoc: Device";break}
    1 {Write-Host "StorageIdAssoc: Port";break}
    2 {Write-Host "StorageIdAssoc: Target";break}
    }
    
    $Data = $null
    switch($CodeSet)
    {
    2 { #StorageIdCodeSetAscii
$DiskUniqueIds_ptr = [System.Runtime.InteropServices.Marshal]::UnsafeAddrOfPinnedArrayElement($DiskUniqueIds, $currentArrayIndex+16)
        $Data = [System.Runtime.InteropServices.Marshal]::PtrToStringAnsi($DiskUniqueIds_ptr, $Length)
        break
        }
    
    3 { #StorageIdCodeSetUtf8
$DiskUniqueIds_ptr = [System.Runtime.InteropServices.Marshal]::UnsafeAddrOfPinnedArrayElement($DiskUniqueIds, $currentArrayIndex+16)
        $Data = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($DiskUniqueIds_ptr, $Length)
        break
        }
    
    default { #0=StorageIdCodeSetReserved, 1=StorageIdCodeSetBinary
for($x = ($currentArrayIndex+16); $x -lt ($currentArrayIndex + 16 + $Length); $x++)
        {
            $Data += , $DiskUniqueIds[$x]
        }
        break
        }
    }
    Write-Host "Data: " $Data
    $currentArrayIndex+=$NextOffset

    Write-Host
}

Sample Output

Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.

PS C:\Users\taylorb>.\GetCSVDevInfo1.ps1

StorageIdType:  EUI64
StorageIdAssoc:  Device
Data:  0 23 56 0 1 19 0 28

StorageIdType:  VendorId
StorageIdAssoc:  Device
Data:  IBM     2810XIV          1300113001C

StorageIdType:  VendorSpecific
StorageIdAssoc:  Device
Data:  vol=CSV_1

StorageIdType:  VendorSpecific
StorageIdAssoc:  Device
Data:  host=37-4611K2713K

StorageIdType:  TargetPortGroup
StorageIdAssoc:  Port
Data:  0 0 0 0

StorageIdType:  PortRelative
StorageIdAssoc:  Port
Data:  0 0 7 1

 

Taylor Brown
Hyper-V Enterprise Deployment Team
taylorb@microsoft.com
http://blogs.msdn.com/taylorb

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