Need help with RDM script to set them to Perennially Reserved

[BenLiebowitz]

So I found this script to set the RDMs to Perennially Reserved, however, we have probably 15-20 VMs with RDMs so doing this manually can be tough.  I'd like to be able to have PowerCLI build a list of all the RDMs. 

I tried to build a foreach loop around the existing one one to detect all the RDMs from the multiple VMs using:  Get-VM | Get-HardDisk -DiskType "RawPhysical","RawVirtual" | Select Parent but was unsuccessful. 

$vmName = "VMwithRDM"
$vm = Get-VM -Name $vmName
$rdm = Get-HardDisk -DiskType rawPhysical -Vm $vm
$vmhosts = Get-Cluster -VM $vm | Get-VMHost
foreach($esx in $vmhosts){
  $esxcli = Get-EsxCli -VMHost $esx
  Get-HardDisk -DiskType rawPhysical -Vm $vm | %{
    $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) |
    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved#
    $esxcli.storage.core.device.setconfig($false,$rdm.ScsiCanonicalName,$true)
    $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) |
    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved
  }
}

Any help would be appreciated! 

Thanks,

[LucD · Accepted solution]

Try something like this

$rdmHD = Get-VM | Get-HardDisk -DiskType RawPhysical,RawVirtual

foreach($rdm in $rdmHD){

  $esxcli = Get-EsxCli -VMHost $rdm.Parent.VMHost

  $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) | 

    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved# 

  $esxcli.storage.core.device.setconfig($false,$rdm.ScsiCanonicalName,$true) 

  $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) | 

    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved 

} 

[BenLiebowitz]

Testing now.. 

[BenLiebowitz]

It worked! 

I modified one line as we're attempting to run this against only 1 host, and set the get-vm to a specific cluster. 

I changed the $esxcli= line to use a $vmhost variable which is set to a specific hostname.

$rdmHD = get-cluster "CLUSTER1" | Get-VM | Get-HardDisk -DiskType RawPhysical,RawVirtual

$vmhost = get-vmhost "VMHOST"

foreach($rdm in $rdmHD){

    $esxcli = Get-EsxCli -VMHost $vmhost

    $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) |

    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved

    $esxcli.storage.core.device.setconfig($false,$rdm.ScsiCanonicalName,$true)

    $esxcli.storage.core.device.list($rdm.ScsiCanonicalName) |

    Select @{N="Time";E={"{0:g}" -f (Get-Date).TimeOfDay}},Device,IsPerenniallyReserved

} 

Thanks Luc!

[tdewanjee]

I have couple of MSCS VM running on a cluster due to which I am having slow boot time and rescan issue on the host and plan to change the rdm lun to Perennially Reserved. Can we run this script on the cluster level for all the MSCS VM at once and does it need a downtime or we can change the value on LUN with the script without any downtime.

While testing the script I am getting below error

Get-VM : 9/11/2017 8:40:30 AM    Get-VM        Exception has been thrown by

the target of an invocation.

At C:\Users\0070tsa\Desktop\RDM_Pr.ps1:1 char:32

+ $rdmHD = get-cluster "LABVC" | Get-VM | Get-HardDisk -DiskType

RawPhysical,RawVi ...

+                                ~~~~~~

    + CategoryInfo          : NotSpecified: (:) [Get-VM], VimException

    + FullyQualifiedErrorId : Core_BaseCmdlet_UnknownError,VMware.VimAutomatio

   n.ViCore.Cmdlets.Commands.GetVM

Thanks !

[LucD]

Does the following return anything?

Get-Cluster "LABVC" | Get-VM

And no, the change doesn't require any downtime.

[SparkRezaRafiee]

LucD's script is valid.

The below script is Cluster based. So need to provide a cluster name and then it finds the all RDM disks attached to all VMs in that cluster. Then it makes the RDM devices perenerrally reserved on

the ESXi hosts.

$ClusterName = "Cluster Name"

# Create a connection object to all hosts in the Target Cluster

$TargetCluster = Get-Cluster -Name $ClusterName | Get-VMHost

# Find the ScsiCanonicalName for all RDM Disks attached to VMs in the Target Cluster

$RDMDisks = Get-VM  | Get-HardDisk -DiskType "RawPhysical","RawVirtual" | Select ScsiCanonicalName

foreach ($rdm2 in $RDMDisks){
$rdm2
}

# Retrieve and EsxCli instance for each connection

foreach($RDMDisk in $RDMDisks) {

foreach($hst in $TargetCluster) {
# And for each RDM Disk

$esxcli=Get-EsxCli -VMHost $Hst
# Set the configuration to "PereniallyReserved".

# setconfig method: void setconfig(boolean detached, string device, boolean perenniallyreserved)

$esxcli.storage.core.device.setconfig($false, ($RDMDisk.ScsiCanonicalName), $false)

}

}

# Disconnect the connection objects created for the Target Cluster

Disconnect-VIServer * -Confirm:$false | Out-Null

[LucD]

Not sure where your code basically differs from the previous code snippets in this thread?

[SparkRezaRafiee]

Your script is valid.

Just wanted to share the script that I have that does a similar thing ina different way.

I should have put a descriptive comment on my post. Let me edit it.

[LucD]

No need for that.
I was just wondering if I was missing something :smileygrin:

[SparkRezaRafiee]

Your scripts can't go wrong mate