[Solved] You wrote this script to send an email alert if disk space is low:$freeSpace = (Get-PSDrive C).Free if ($freeSpace -lt "100MB") { Send-MailMessage -From 'alert@example.com' -To 'admin@example.... | PowerShell

PowerShell - Automation Patterns

You wrote this script to send an email alert if disk space is low:

$freeSpace = (Get-PSDrive C).Free
if ($freeSpace -lt "100MB") {
  Send-MailMessage -From 'alert@example.com' -To 'admin@example.com' -Subject 'Low Disk Space' -Body 'Disk space below 100MB' -SmtpServer 'smtp.example.com'
}

But no email is sent even when disk space is low. What is the likely problem?

AThe if condition should use -gt instead of -lt

BGet-PSDrive does not return Free space

CSend-MailMessage requires -Port parameter

D100MB is not a valid size unit in PowerShell comparison

Step-by-Step Solution

Solution:

Step 1: Check the size comparison
PowerShell does not recognize '100MB' as a valid number; it must be converted to bytes.
Step 2: Understand Get-PSDrive output
Get-PSDrive returns Free space in bytes as a number, so comparing to '100MB' string fails silently.
Final Answer:
100MB is not a valid size unit in PowerShell comparison -> Option D
Quick Check:
Size units must be numeric bytes [OK]

Quick Trick: Use numeric bytes, not '100MB' string in comparisons [OK]

Common Mistakes:

Assuming Get-PSDrive Free is not available
Thinking Send-MailMessage needs -Port always
Confusing less than and greater than operators

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You wrote this script to send an email alert if disk space is low:

Step 1: Check the size comparison

Step 2: Understand Get-PSDrive output

Final Answer:

Quick Check:

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