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Drive space monitor with specific thresholds on all drives

Posted on 2013-02-05
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Last Modified: 2013-02-06
Hello, all. This is my first foray into posting on this site, though I've been a consumer for a while now. I'm far from an expert at scripting, but I understand enough that, with the help of Google and Experts-Exchange, I can usually muddle through.

My resent task is of a rather specific nature. The short version is this: I need to monitor and alert on each drive on every server in my environment when they dip below a predefined threshold. I've found this type of script here, however, the difference I need (and what I'm envisioning) is pulling the list from a text file like so:

server1 c 5
server1 e 10
server1 f 4
server2 c 5

In the above example, the script would pull the server names from a text file, and it would then know the drive letter it needs to monitor as well as the %-specific threshold for that given drive.

The scripts I've found so far all have a set threshold for all drives and all servers. This seems like a very odd way of doing it, given the huge variance in drive capacities on all of the possible servers in a given environment. That is to say, 5% of a 50 GB drive is considerably different from 5% of a 3 TB drive.

If an example of this type of script exists, a link would be wonderful. I've Googled it every way I can think of, to no avail. Thank you in advance.
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Question by:avwoolsey
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4 Comments
 
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Expert Comment

by:Manpreet SIngh Khatra
ID: 38856346
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LVL 40

Accepted Solution

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Subsun earned 500 total points
ID: 38858635
Try this..
$Servers = Import-Csv "C:\ServerList.csv"

Foreach ($server in $Servers){
$Disk = Get-WmiObject win32_volume -ComputerName $server.ServerName | 
 where {$_.DriveType -like "3" -and $_.caption -eq "$($Server.Drive):\"} | 
  Select @{L="Server";E={$server.ServerName}},caption,`
	  @{L="TotalSpace";E={$([math]::Round(($_.Capacity/1073741824),0))}},`
	    @{L="freeSpace";E={$([Math]::Round(($_.FreeSpace/1073741824),0))}}

$freePercent = [Math]::Round(($($Disk.freeSpace/$Disk.TotalSpace)*100),0)
if ($freePercent -le $Server.Threshold)
 {
	$Body = $Disk | Select Server,caption,TotalSpace,freeSpace,@{L="freePercent";E={$freePercent}} | ConvertTo-Html | Out-String

	Send-MailMessage `
		-From subsun@Domain.com `
		-To subsun@Domain.com `
		-Subject "$($Disk.Server): Disk space on $($Disk.caption)(%) is low - $((Get-Date).ToString('MM/dd/yyyy h:mm:ss tt'))" `
		-BodyAsHtml $Body `
		-SmtpServer Smtp.mail.com
 }
}

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CSV Format
ServerName,Drive,Threshold
HostA,c,5
HostB,e,10

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You can schedule the  script to run at regular intervals to monitor the disk space..
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LVL 40

Expert Comment

by:Subsun
ID: 38858646
And if you need a HTML formatted alert, then try this..
$Servers = Import-Csv "C:\ServerList.csv"

$a = "<style>"
$a = $a + "BODY{background-color:peachpuff;}"
$a = $a + "TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}"
$a = $a + "TH{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:thistle}"
$a = $a + "TD{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:palegoldenrod}"
$a = $a + "</style>"

Foreach ($server in $Servers){
$Disk = Get-WmiObject win32_volume -ComputerName $server.ServerName | 
 where {$_.DriveType -like "3" -and $_.caption -eq "$($Server.Drive):\"} | 
  Select @{L="Server";E={$server.ServerName}},caption,`
	  @{L="TotalSpace";E={$([math]::Round(($_.Capacity/1073741824),0))}},`
	   @{L="freeSpace";E={$([Math]::Round(($_.FreeSpace/1073741824),0))}}

$freePercent = [Math]::Round(($($Disk.freeSpace/$Disk.TotalSpace)*100),0)
if ($freePercent -le $Server.Threshold)
 {
	$Body = $Disk | Select Server,caption,TotalSpace,freeSpace,@{L="freePercent";E={$freePercent}} |
	ConvertTo-Html -head $a -body "<H2>Disk Information</H2>" | Out-String

	Send-MailMessage `
		-From subsun@domain.com `
		-To subsun@domain.com `
		-Subject "$($Disk.Server): Disk space on $($Disk.caption)(%) is low - $((Get-Date).ToString('MM/dd/yyyy h:mm:ss tt'))" `
		-BodyAsHtml $Body `
		-SmtpServer smtp.domain.com
 }
}

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1
 

Author Closing Comment

by:avwoolsey
ID: 38860878
This is exactly what I was looking for in a solution. Thank you very, very much.
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