Server/ DC Uptime using Powershell Script

Hi

I got below script from technet link (https://technet.microsoft.com/en-us/magazine/2008.12.heyscriptingguy.aspx) for server/DCs UPtime in percentage form.

I am trying to run it for multiplese domain controllers which are in CSV file as input.

But I am getting display output only one DC, not for all other dcs which are in CSV file

Please help me or guide me to get this.

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Import-CSV "D:\gops\serverlist.csv" | foreach {

Param($servername,$NumberOfDays = 30, [switch]$debug)

if($debug) { $DebugPreference = " continue" }

[timespan]$uptime = New-TimeSpan -start 0 -end 0

$currentTime = get-Date

$startUpID = 6005

$shutDownID = 6006

$unexpectedshutdown = 6008

$minutesInPeriod = (24*60)*$NumberOfDays

$startingDate = (Get-Date -Hour 00 -Minute 00 -Second 00).adddays(-$numberOfDays)

Write-debug "'$uptime $uptime" ; start-sleep -s 1

write-debug "'$currentTime $currentTime" ; start-sleep -s 1

write-debug "'$startingDate $startingDate" ; start-sleep -s 1

$servername = $_.servername

$events = Get-EventLog -LogName system -ComputerName $servername -ErrorAction SilentlyContinue | 

Where-Object { $_.eventID -eq  $startUpID -OR $_.eventID -eq $shutDownID -OR $_.eventid -eq $unexpectedshutdown `

  -and $_.TimeGenerated -ge $startingDate } 

write-debug "'$events $($events)" ; start-sleep -s 1

$sortedList = New-object system.collections.sortedlist

ForEach($event in $events)

{

 $sortedList.Add( $event.timeGenerated, $event.eventID )

} #end foreach event

$uptime = $currentTime - $sortedList.keys[$($sortedList.Keys.Count-1)]

Write-Debug "Current uptime $uptime"

For($item = $sortedList.Count-2 ; $item -ge 0 ; $item -- )

{ 

 Write-Debug "$item `t `t $($sortedList.GetByIndex($item)) `t `

   $($sortedList.Keys[$item])" 

 if($sortedList.GetByIndex($item) -eq $startUpID)

 {

  $uptime += ($sortedList.Keys[$item+1] - $sortedList.Keys[$item])

  Write-Debug "adding uptime. `t uptime is now: $uptime"

 } #end if  

} #end for item 

"Total up time on $env:computername since $startingDate is " + "{0:n2}" -f `

  $uptime.TotalMinutes + " minutes."

$UpTimeMinutes = $Uptime.TotalMinutes

$percentDownTime = "{0:n2}" -f (100 - ($UpTimeMinutes/$minutesInPeriod)*100)

$percentUpTime = 100 - $percentDowntime

"$percentDowntime% downtime and $percentUpTime% uptime."

$props = @{

ServerName = $servername

Uptime = $UpTimeMinutes

        PercentUptime = $percentUpTime

        PercentDowntime = $percentDowntime

   }

New-Object PsObject -Property $props

}

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