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vCenter_VM_write_average.ps1

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+# Before executing this script, review the instructions in the README file and modify the script as instructed.
+# The script will fail without making the changes described in the README file.
+
+$report = @()
+	Get-VM | %{$stats = Get-Stat -Entity $_ -Stat disk.write.average -Start (Get-Date).adddays(-7) -ErrorAction SilentlyContinue
+	if($stats){
+	$statsGrouped = $stats | Group-Object -Property MetricId
+	$row = "" | Select Name, WriteAvgKBps, WriteAvgMBps
+	$row.Name = $_.Name
+	$row.WriteAvgKBps = ($statsGrouped | where {$_.Name -eq "disk.write.average"} | %{$_.Group | Measure-Object -Property Value -Average}).Average
+	$row.WriteAvgMBps = $row.WriteAvgKBps/1024
+	$row.WriteAvgKBps = "{0:N2}" -f $row.WriteAvgKbps
+	$row.WriteAvgMBps = "{0:N2}" -f $row.WriteAvgMBps
+	$report += $row
+	}
+}
+$report | Export-Csv "C:\VM-write-average.csv"