Functions/Performance/Measure-Storage.ps1
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<#
.SYNOPSIS Get the current storage usage on the local system. .DESCRIPTION Use WMI/CIM and the Windows Performance Counters to retrieve the current storage usage on the local system. - Size The volume size in GB. - Free The free size in GB. - Usage Current disk activity time in percent. - Queue Current disk queue length. - AvgRead Average duration in seconds for read operations. - AvgWrite Average duration in seconds for write operations. - IOPS Number of read and write operations. .EXAMPLE PS C:\> storage Use the alias of Measure-Storage to show the current memory usage. #> function Measure-Storage { [CmdletBinding()] [Alias('storage')] param ( # Flag to continue showing the memory every second. [Parameter(Mandatory = $false)] [Alias('c')] [Switch] $Continue ) $counterNames = '\PhysicalDisk(*)\% Disk Time', '\PhysicalDisk(*)\Avg. Disk sec/Read', '\PhysicalDisk(*)\Avg. Disk sec/Write', '\PhysicalDisk(*)\Disk Transfers/sec', '\PhysicalDisk(*)\Current Disk Queue Length' # Gather all volumes, partitions and disks. $volumes = Get-CimInstance -ClassName 'Win32_Volume' | Where-Object { $_.Name -like '?:\*' -and $_.DriveType -ne 5 } | Select-Object 'Name', 'DeviceID', 'DriveLetter', 'FreeSpace', 'Capacity' $partitions = Get-CimInstance -ClassName 'MSFT_Partition' -Namespace 'Root/Microsoft/Windows/Storage' | Select-Object 'DiskNumber', 'AccessPaths' do { # Counters new for every run. $perfCounterStorage = Get-Counter -Counter $counterNames -SampleInterval 1 -MaxSamples 1 $timestamp = Get-Date # Iterating all volumes, get the matching partition and create a new # performance counter object. foreach ($volume in $volumes) { $partition = $partitions | Where-Object { $_.AccessPaths -contains $volume.DeviceID } | Select-Object -First 1 $perfCounterStorageIdentifier = '{0}*{1}*' -f $partition.DiskNumber, $volume.DriveLetter $counterDisk = [PSCustomObject] @{ PSTypeName = 'ProfileFever.Performance.Storage' Timestamp = $timestamp Name = '{0} {1}' -f $partition.DiskNumber, $volume.Name Size = $volume.Capacity / 1GB Free = $volume.FreeSpace / 1GB Used = ($volume.Capacity - $volume.FreeSpace) / 1GB DiskTime = $perfCounterStorage.CounterSamples.Where({$_.Path -like "\\*\PhysicalDisk($perfCounterStorageIdentifier)\% Disk Time"}).CookedValue DiskQueue = $perfCounterStorage.CounterSamples.Where({$_.Path -like "\\*\PhysicalDisk($perfCounterStorageIdentifier)\Current Disk Queue Length"}).CookedValue AvgRead = $perfCounterStorage.CounterSamples.Where({$_.Path -like "\\*\PhysicalDisk($perfCounterStorageIdentifier)\Avg. Disk sec/Read"}).CookedValue AvgWrite = $perfCounterStorage.CounterSamples.Where({$_.Path -like "\\*\PhysicalDisk($perfCounterStorageIdentifier)\Avg. Disk sec/Write"}).CookedValue IOPS = $perfCounterStorage.CounterSamples.Where({$_.Path -like "\\*\PhysicalDisk($perfCounterStorageIdentifier)\Disk Transfers/sec"}).CookedValue } Write-Output $counterDisk # Show warning messages if thresholds are reached. if ($counterDisk.Free -lt 1) { Write-Warning ('The Disk {0} Free Space is {1:0}MB falling below 1GB' -f $counterDisk.Name, ($counterDisk.Free * 1000)) } $counterDiskFreePercent = $counterDisk.Free / $counterDisk.Size * 100 if ($counterDiskFreePercent -lt 5) { Write-Warning ('The Disk {0} Free Space is {1:0.0}% falling below 5%' -f $counterDisk.Name, $counterDiskFreePercent) } if ($counterDisk.DiskTime -gt 80) { Write-Warning ('The Disk {0} Disk Time is {1:0.0} exceeding 80%' -f $counterDisk.Name, $counterDisk.DiskTime) } if ($counterDisk.DiskQueue -gt 2) { Write-Warning ('The Disk {0} Queue Length is {1:0} exceeding 2' -f $counterDisk.Name, $counterDisk.DiskQueue) } if ($counterDisk.AvgRead -gt 0.010) { Write-Warning ('The Disk {0} Average Millisecond per Read is {1:0}ms exceeding 10ms' -f $counterDisk.Name, ($counterDisk.AvgRead * 1000)) } if ($counterDisk.AvgWrite -gt 0.010) { Write-Warning ('The Disk {0} Average Millisecond per Write is {1:0}ms exceeding 10ms' -f $counterDisk.Name, ($counterDisk.AvgWrite * 1000)) } } } while ($Continue.IsPresent) } |