Unmount Datastores from multiple ESXi

[rxjoseph]

Hi LucD

I am using this function to unmount Datastore from multiple ESXi host 

https://communities.vmware.com/t5/VMware-PowerCLI-Documents/Datastore-Mount-Unmount-Detach-Attach-fu...

However when i run the command i get the following error 

To be secure and i dont remove anything else i need to specify the cluster as well 

#########################################

get-datastore CLUSTER227_003_NR | Unmount-Datastore

###########################################

Error

Get-View : 8-7-2022 13:28:02 Get-View Object reference not set to an instance of an object.
At line:98 char:18
+ $hostview = Get-View $VMHost.Key
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Get-View], VimException
+ FullyQualifiedErrorId : Core_BaseCmdlet_UnknownError,VMware.VimAutomation.ViCore.Cmdlets.Commands
.DotNetInterop.GetVIView

Get-View : 8-7-2022 13:28:02 Get-View View with Id 'HostSystem-host-8168' was not found on the server(
s).
At line:98 char:18
+ $hostview = Get-View $VMHost.Key
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (:) [Get-View], VimException
+ FullyQualifiedErrorId : Core_GetView_WriteNotFoundError,VMware.VimAutomation.ViCore.Cmdlets.Comma
nds.DotNetInterop.GetVIView

Get-View : Cannot validate argument on parameter 'VIObject'. The argument is null or empty. Provide an a
rgument that is not null or empty, and then try the command again.
At line:99 char:29
+ ... $StorageSys = Get-View $HostView.ConfigManager.StorageSystem
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Get-View], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationError,VMware.VimAutomation.ViCore.Cmdlets.Comm
ands.DotNetInterop.GetVIView

Unmounting VMFS Datastore CLUSTER227_003_NR from host ...
You cannot call a method on a null-valued expression.
At line:101 char:6
+ ... $StorageSys.UnmountVmfsVolume($DS.ExtensionData.Info.vmfs ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull

Get-View : 8-7-2022 13:28:02 Get-View Object reference not set to an instance of an object.
At line:98 char:18
+ $hostview = Get-View $VMHost.Key
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Get-View], VimException
+ FullyQualifiedErrorId : Core_BaseCmdlet_UnknownError,VMware.VimAutomation.ViCore.Cmdlets.Commands
.DotNetInterop.GetVIView

Get-View : 8-7-2022 13:28:02 Get-View View with Id 'HostSystem-host-8342' was not found on the server(
s).
At line:98 char:18
+ $hostview = Get-View $VMHost.Key
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (:) [Get-View], VimException
+ FullyQualifiedErrorId : Core_GetView_WriteNotFoundError,VMware.VimAutomation.ViCore.Cmdlets.Comma
nds.DotNetInterop.GetVIView

Get-View : Cannot validate argument on parameter 'VIObject'. The argument is null or empty. Provide an a
rgument that is not null or empty, and then try the command again.
At line:99 char:29
+ ... $StorageSys = Get-View $HostView.ConfigManager.StorageSystem
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Get-View], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationError,VMware.VimAutomation.ViCore.Cmdlets.Comm
ands.DotNetInterop.GetVIView

Please help

Many thanks

RXJ

[LucD]

It looks like that datastore is connected to an ESXi node that is not found in the vCenter you are currently connected to.

Just to make sure that datastore is actually named 'CLUSTER227_003_NR'?

[rxjoseph]

Hi LucD

I sorted its working thanks

I have another query because  I am decommissioning ESXi host and I want to make sure i remove only the correct Luns from the Cluster which is subject to decom

The below query works but it dosent remove only from the specified ESXi host, it removes from all ESXi host

I need to be able to remove from specified ESXi host

How to do that please 

$xDS = import-csv -Path E:\RXJ\DecomDS.csv

foreach ($DcomDS in $xds ) {

get-cluster Cluster109_SQL |get-vmhost xxx01018..example.com |get-datastore $DcomDS.Ds_name |Unmount-Datastore

}

Many thanks

RXJ

[LucD · Accepted solution]

That is what the Unmount-Datastore function does, it unmounts the datastore from all ESXi nodes that have it mounted.
You will have to change the function if you only want the unmount to happen on a specific ESXi node.

Something like this

$esxName = 'MyEsx'
$dsName = 'MyDS'

$ds = Get-Datastore -Name $dsName
$esx = Get-VMHost -Name $esxName

$storSys = Get-View $esx.ExtensionData.ConfigManager.StorageSystem
$storSys.UnmountVmfsVolume($ds.ExtensionData.Info.vmfs.uuid)

[rxjoseph]

Thanks LucD

really appreciate your help