topic Re: Brainfreeze..... Snapshot used space in Microsoft Virtualization Discussions

Brainfreeze..... Snapshot used space

JGPSHNTAP — Thu, 05 Jun 2025 05:52:46 GMT

Ok, i'm suffering from a brainfreeze today.....

Im looking to find active snapshot used space on volumes and i'm having an absolute brainfreeze.... Will someone kick start my brain for me...

I tried get-nahelp *snapshot* but nothing there

Re: Brainfreeze..... Snapshot used space

markweber — Wed, 02 Oct 2013 18:10:07 GMT

you can get the total snap usage from:

( get-naefficiency vol0).SnapUsage

Re: Brainfreeze..... Snapshot used space

JGPSHNTAP — Wed, 02 Oct 2013 18:19:58 GMT

Perfect.. With all the powershell I do, I never used that cmdlet.. Cool, I will use it.. thanks...

Re: Brainfreeze..... Snapshot used space

JGPSHNTAP — Wed, 02 Oct 2013 18:34:34 GMT

This did the trick..

"{0:N0}" -f( (((get-naefficiency vol1).snapusage).used ) / 1gb)

Re: Brainfreeze..... Snapshot used space

BISHTECHIT — Wed, 02 Oct 2013 19:37:58 GMT

- a clever and very terse code - but when ran I get 'NO' - how would this provide me with your request [...active snapshot used space on volumes...]?

Re: Brainfreeze..... Snapshot used space

JGPSHNTAP — Wed, 02 Oct 2013 19:46:41 GMT

Peter,

Im not following you on this? The above code works without issue.. Can you paste what you put and output.. (Take out any company specifics)

Re: Brainfreeze..... Snapshot used space

BISHTECHIT — Wed, 02 Oct 2013 20:11:05 GMT

JGPShntap -

My bad - I re-ran the script - this time copy&paste - I got the correct answer - I think my brackets were not spaced correctly

"{0:N0}" -f( (((get-naefficiency vol0).snapusage).used ) / 1gb)

(get-naefficiency vol0).SnapUsage | ft -AutoSize

Count Reserve Used Overflow

----- ------- ---- --------

10 32212254720 7813873664 0

Re: Brainfreeze..... Snapshot used space

JGPSHNTAP — Thu, 03 Oct 2013 00:31:42 GMT

Peter

There is many ways to skin a cat here.. I did it that way b/c I was using it in an excel spreadsheet.

But if you just want to see output, you can send it to convertto-formattednumber

PS C:\powershell> ((get-naefficiency vol0).snapusage).used | convertto-formattednumber

55G

Or i wrote a function that i load as a module

Function Convert-togb()
{
Param (
[Parameter(Position=0,Mandatory=$True,ValueFromPipeline=$True)]
#[int]$data
$data
)

Process {
[math]::truncate($data/1gb)
}

}

and I just send it to that

PS C:\powershell> ((get-naefficiency vol0).snapusage).used | convert-togb