Get-ProliantDiskDrives.ps1

#requires -version 3
<#
.SYNOPSIS
Get-ProliantDiskDrives - Get HP ProLiant disk drive status for PRTG

.DESCRIPTION 
Reads the status of HP ProLiant Smart Array disk drives via WMI and HP WBEM

http://www.hp.com/go/HPwbem

.OUTPUTS
XML formatted for a PRTG Advanced Script Sensor. 
Numeric status per channel as per $statusDMTF and $statusHPExtended below

.LINK
http://daniel.streefkerkonline.com/monitoring-hp-proliant-via-powershell-wmi-drive-health/

.NOTES
Written By: Daniel Streefkerk
Website:	http://daniel.streefkerkonline.com
Twitter:	http://twitter.com/dstreefkerk
Todo:       Nothing at the moment

Change Log
https://gist.github.com/dstreefkerk/10224178
#>

Param(
  [Parameter(Position=0,Mandatory=$true,ValueFromPipeline=$false,HelpMessage='Name of the server to connect to')]
  [String]
  $ServerName
)

# Capitalise the server name, just for display purposes later
$ServerName = $($ServerName.ToUpper())

$statusDMTF = @{
                    '0' = 'Unknown'
                    '1' = 'Other'
                    '2' = 'OK'
                    '3' = 'Degraded'
                    '4' = 'Stressed'
                    '5' = 'Predictive Failure'
                    '6' = 'Error'
                    '7' = 'Non-Recoverable Error'
                    '8' = 'Starting'
                    '9' = 'Stopping'
                    '10' = 'Stopped'
                    '11' = 'In Service'
                    '12' = 'No Contact'
                    '13' = 'Lost Communication'
                    '14' = 'Aborted'
                    '15' = 'Dormant'
                    '16' = 'Supporting Entity in Error'
                    '17' = 'Completed'
                    '18' = 'Power Mode'
                    '19' = 'Relocating'
                }

$statusHPExtended = @{
                    '32768' = 'Queued for Secure Erase'
                    '32769' = 'Erase in Progress'
                    '32770' = 'Erase Completed'
                    '32771' = 'Physical Path In Error'
                    '32772' = 'Transient Data Drive'
                    '32773' = 'Rebuild'
                    '32774' = 'SSDWearOut'
                    '32775' = 'Not Authenticated'
                }

# First, test that we can use WMI
$wmiErrorVariable = @()
try {
    $computerSystem = Get-WmiObject -Namespace ROOT\CIMV2 -Class Win32_ComputerSystem -ComputerName $ServerName -ErrorAction Stop -WarningAction SilentlyContinue -ErrorVariable wmiErrorVariable
    }
catch [System.UnauthorizedAccessException] {
    $wmiError = $true
    $wmiErrorMessage = "WMI Access to $ServerName is denied. Error: $($_.Exception.Message)"
}
catch [System.Runtime.InteropServices.COMException] {
    $wmiError = $true
    $wmiErrorMessage = "Couldn't query $ServerName via WMI. Error: $($_.Exception.Message)"
}
catch {
    $wmiError = $true
    $wmiErrorMessage = $_.Exception.Message
}
finally {
    if ($wmiError -eq $true) {
        "<prtg>"
        "<error>1</error>"
        "<text>$wmiErrorMessage $($_.Exception.Message)</text>"
        "</prtg>"
        Exit
    }
}

# Get all disks via WMI
$disks = Get-WmiObject -Namespace ROOT\HPQ -Class HPSA_DiskDrive -ComputerName $ServerName -WarningAction SilentlyContinue -ErrorAction SilentlyContinue -ErrorVariable wmiError

# If the ROOT\HPQ WMI query failed, throw an error.
if ($wmiError.Count -gt 0) {
    "<prtg>"
    "<error>1</error>"
    "<text>The Insight WBEM Management Providers don't seem to be installed on $($ServerName.ToUpper()). Error: $($wmiError.Exception.Message)</text>"
    "</prtg>"
    Exit
}

$diskObjectCollection = @()

foreach ($disk in $disks) {
    $thisDisk = New-Object psobject

    # Display name for the channel
    $diskName = "$($disk.ElementName) - $($disk.Description) Disk $($disk.Name)"

    # Base operational status in textual form
    $baseStatus = $disk.OperationalStatus[0]

    # Extended operational status in textual form
    $extendedStatus = $disk.OperationalStatus[1]

    # Set some properties we'll use later
    $thisDisk | Add-Member -MemberType "NoteProperty" -Name "Name" -Value $diskName

    #Uncomment the below line, and comment out the line below it to get a textual representation of the status instead of a number
    #$thisDisk | Add-Member -MemberType "NoteProperty" -Name "OperationalStatus" -Value $statusDMTF["$baseStatus"]
    $thisDisk | Add-Member -MemberType "NoteProperty" -Name "OperationalStatus" -Value $baseStatus

    #Uncomment the below line, and comment out the line below it to get a textual representation of the status instead of a number
    #$thisDisk | Add-Member -MemberType "NoteProperty" -Name "ExtendedOperationalStatus" -Value $statusHPExtended["$extendedStatus"]
    $thisDisk | Add-Member -MemberType "NoteProperty" -Name "ExtendedOperationalStatus" -Value "$extendedStatus"
    
    # If the Operational Status of the disk isn't equal to 2 (OK), we'll be setting the whole PRTG sensor to error
    if ($baseStatus -ne 2) {
        $thisDisk | Add-Member -MemberType NoteProperty -Name "Error" -Value $true
        $thisDisk | Add-Member -MemberType NoteProperty -Name "StateMessage" -Value "$diskName has the following operational status: $($statusDMTF["$baseStatus"])/$($statusHPExtended["$extendedStatus"])). "
    } else {
        $thisDisk | Add-Member -MemberType NoteProperty -Name "Error" -Value $false
        $thisDisk | Add-Member -MemberType NoteProperty -Name "StateMessage" -Value $null
    }

    # Add this custom object to the collection
    $diskObjectCollection += $thisDisk
}

# If you don't use PRTG, you could just un-comment the below line
#$diskObjectCollection | ft -AutoSize; exit;

"<prtg>"
foreach ($diskObject in $diskObjectCollection) {
    "<result>"
        "<channel>$($diskObject.name)</channel>"
        
        # Display the status message in the channel
        if ($diskObject.ExtendedOperationalStatus -gt 0) {
            "<value>$($diskObject.OperationalStatus).$($diskObject.ExtendedOperationalStatus)</value>"
        } else {
            "<value>$($diskObject.OperationalStatus)</value>"
        }

        # Set the channel to warning status if there operational status isn't as it should be
        if ($diskObject.Error -eq $true) {
            "<warning>1</warning>"
        }

    "</result>"
}

# If any of the disks are in error, output their status to the sensor's message field.
if (($diskObjectCollection | where error -eq $true).count -gt 0) {
    "<error>1</error>"
    "<text>$($diskObjectCollection | where error -eq $true | % {$($_.StateMessage)})</text>"
}

"</prtg>"