CODEWITHSUNDEEP
powershell
Nov2009
Nov2009

Reputation: 323

Powershell script to initialize new drives, naming them from array

I drummed up the following code to initialize new disks that are added to a Windows VM:

 $newdisk = get-disk | where partitionstyle -eq 'raw'

foreach ($d in $newdisk){
$disknum = $d.Number
$dl = get-Disk $d.Number | Initialize-Disk -PartitionStyle GPT -PassThru | New-Partition -AssignDriveLetter -UseMaximumSize
Format-Volume -driveletter $dl.Driveletter -FileSystem NTFS -NewFileSystemLabel "Disk $disknum" -Confirm:$false
}

Instead of using the disk number for the file system label, I want to use some predefined volume names, like "OS", "Data", "System", etc....

I tried $name = "OS", "Data", "System" and put that variable in place of $disknum, but that just added the whole string as the volume name as it looped through.

Am I missing something? Should it be a variable inside of the loop? How can I get it to read each name from the variable for each run of the disk initilization inside the loop ?

I am newish to powershell and seeing examples helps me quite a bit.

Upvotes: 1

Views: 8781

Answers (2)

rivolity
rivolity

Reputation: 1

  1. you can initialize disk based on the size of the attached disk.
  2. In a scenario when you attach so many disks, you may want to attribute a specific letter to a disk based on it's size. #in this scenario, we will attribute letter F to a 20GB disk.
$disknum = @(get-disk | Where-Object partitionstyle -eq 'raw'| Where-Object {$_.Size /1GB -match '20'})
$dl = get-Disk $disknum.Number | 
Initialize-Disk -PartitionStyle GPT -PassThru | New-Partition -AssignDriveLetter -UseMaximumSize
Format-Volume -driveletter F -FileSystem NTFS -NewFileSystemLabel 'DB Data' -Confirm:$false

Upvotes: 0

Kiran Reddy
Kiran Reddy

Reputation: 2904

Since i do not know how many drives you are working with i included some dummy entries in the labels array.

this uses a for loop instead of a foreach thus preventing the need for a nested loop structure.

$newdisk = @(get-disk | Where-Object partitionstyle -eq 'raw')
$Labels = @('OS','Data','System','OS','Data','System')

for($i = 0; $i -lt $newdisk.Count ; $i++)
{

    $disknum = $newdisk[$i].Number
    $dl = get-Disk $disknum | 
       Initialize-Disk -PartitionStyle GPT -PassThru | 
          New-Partition -AssignDriveLetter -UseMaximumSize
    Format-Volume -driveletter $dl.Driveletter -FileSystem NTFS -NewFileSystemLabel $Labels[$i] -Confirm:$false

}

Upvotes: 2

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