Attempted to divide by zero

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JoeyD-6442 asked · Mar 07 at 05:16 PM

Attempted to divide by zero

any idea why I am getting this error

get-diskspace2.ps1

param(
[string]$VM
)

$report += Get-WmiObject Win32_Volume -ComputerName $VM| ForEach {
New-Object PSObject -Property @{
Computername = $VM
Name = $.Name
Label = $.Label
FreeSpace_GB = ([Math]::Round($.FreeSpace /1GB,2))
TotalSize_GB = ([Math]::Round($.Capacity /1GB,2))
UsedSpace_GB = ([Math]::Round($.Capacity /1GB,2)) - ([Math]::Round($.FreeSpace /1GB,2))
Percent_Free = ([int]($.Freespace*100/$.Capacity))
filesystem = $_.filesystem
}
}

$report

windows-server-powershell

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Answer 1 · 2021-03-07T17:44:53.487Z

MotoX80 answered · Mar 07 at 05:44 PM

It would appear that this is the only statement that could generate that error.

 Percent_Free = ([int]($.Freespace*100/$_.Capacity))

So you have some volume where $_.Capacity is zero.

Add some debugging statements to your script to determine which volume is causing the problem. Maybe start by just looking at the raw freespace and capacity numbers

Add an if statement to test for zero and don't do the division if it is.

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Answer 2 · 2021-03-08T02:53:28.783Z

IanXue-MSFT answered · Mar 08 at 02:53 AM

Hi,

The error message means the $_.Capacity of some volume is zero. It could be the CD-ROM. If you only want to get the hard drives you can filter with DriveType like below

 $report += Get-WmiObject Win32_Volume -ComputerName $VM | Where-Object {$_.DriveType -eq 3} | ForEach{ ... }

DriveType

Best Regards，
Ian Xue
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