PowerCLI: Adding multiple disks to a virtual machine using the New-HardDisk cmdlet

I was recently adding a number of  hard disks to a virtual machine on an number of SCSI controller devices, so rather than using the vSphere Web Client I looked at using the New-HardDisk cmdlet in order to repeat this task of adding a new virtual machine hard disk .

I wanted to create the virtual machine hard disks on a single datastore with the below characteristics:

  • Capacity: 30GB
  • Storage Format: EagerZeroedThick
  • SCSI Controller: SCSI Controller 1

I could achieve this for a single hard disk by invoking the New-HardDisk cmdlet as below:

New-HardDisk -VM VM1 -CapacityGB 30 -Datastore "Datastore1" -StorageFormat EagerZeroedThick -Controller "SCSI Controller 1"

However, as I was required to this multiple times, I leveraged the use of pure math with the ForEach loop to achieve this task to create the six virtual hard disks.

ForEach ($HardDisk in (1..6))
    { 
    New-HardDisk -VM VM1 -CapacityGB 30 -Datastore Datastore1 -StorageFormat EagerZeroedThick -Controller "SCSI Controller 1"
    } 

Furthermore, I was adding additional hard disks on a number of SCSI controllers, I could expand the above further to invoke multiple ForEach loops for each SCSI controller, specifying a different datastore and size for each.

ForEach ($HardDisk in (1..6))
    { 
    New-HardDisk -VM VM1 -CapacityGB 30 -Datastore Datastore1 -StorageFormat EagerZeroedThick -Controller "SCSI Controller 1"
    } 
ForEach ($HardDisk in (1..2))
    { 
    New-HardDisk -VM VM1 -CapacityGB 10 -Datastore Datastore2 -StorageFormat EagerZeroedThick -Controller "SCSI Controller 2"
    } 
ForEach ($HardDisk in (1..3))
    { 
    New-HardDisk -VM VM1 -CapacityGB 20 -Datastore Datastore3 -StorageFormat EagerZeroedThick -Controller "SCSI Controller 3"
    } 

 

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