Attempted to divide by zero

JoeyD 1 Reputation point
2021-03-07T17:16:31.097+00:00

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)
filesystem = $_.filesystem
}
}

$report

Windows Server PowerShell
Windows Server PowerShell
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.PowerShell: A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language.
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  1. MotoX80 25,671 Reputation points
    2021-03-07T17:44:53.487+00:00

    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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  2. Ian Xue (Shanghai Wicresoft Co., Ltd.) 19,141 Reputation points Microsoft Vendor
    2021-03-08T02:53:28.783+00:00

    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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