PowerShell script used for Stablebit DrivePool. The goal is to offload files from an SSD pool to a magnetic pool in FIFO order.

drivePoolMoves.ps1

Set-StrictMode -Version 1

# Script drivePoolMoves.ps1
<# .SYNOPSIS
	Script will move files from one DrivePool to another according to FIFO policy
.DESCRIPTION
     The script can be set to run as often as desired.  The expected layout is a DrivePool consisting of two DrivePools, one magnetic and one solid state.
.NOTES
     Author     : fly (Zac)
#>

# Number of files to move before rechecking SSD space
$moveCount = 1

# Path to PoolPart folder on magnetic DrivePool drive
$archiveDrive = "E:\PoolPart.xxxx\Shares\"

# Path to PoolPart folder on SSD DrivePool drive
$ssdSearchPath = "F:\PoolPart.xxxx\Shares\"

# Minimum SSD drive use percent.  Below this amount, stop archiving files.
$ssdMinUsedPercent = 65

# Maximum SSD drive use percent.  Above this amount, start archiving files.
$ssdMaxUsedPercent = 85

# Do not move more than this many files
$fileArchiveLimit = 200

# Exclude these file/folder names
[System.Collections.ArrayList]$excludeList = @('*.covefs*', '*ANYTHING.YOU.WANT*')

# Other stuff
$ssdDriveLetter = ""
$global:ssdCurrentUsedPercent = 0
$fileNames = @()
$global:fileCount = 0
$errors = @()

Write-Output "---------------------------------------"
Write-Output "STARTING SCRIPT"
Write-Output "---------------------------------------"

function CheckSSDAbove($percent) {
	$ssdDriveLetter = $ssdSearchPath.Substring(0, 2)
	Get-WmiObject Win32_Volume | 
		Where-object {$ssdDriveLetter -contains $_.DriveLetter} |
		ForEach {
			$global:ssdUsedPercent = (($_.Capacity - $_.FreeSpace) * 100) / $_.Capacity
			$global:ssdUsedPercent = [math]::Round($ssdUsedPercent, 2)
		}
	
	If ($ssdUsedPercent -ge $percent) {
		Return $true
	} Else {
		Return $false
	}
}

function MoveOldestFiles {
	$fileNames = Get-ChildItem -Path $ssdSearchPath -Recurse -File -Exclude $excludeList | 
		Sort-Object CreationTime |
		Select-Object -First $moveCount
	
	If (!$fileNames) {
		Write-Output "No files found to archive!"
		Exit
	}
	
	ForEach ($fileName in $fileNames) {
		Write-Output "Moving from: "
		Write-Output $fileName.FullName
		$destFilePath = $fileName.FullName.Replace($ssdSearchPath, $archiveDrive)
		Write-Output "Moving to: "
		Write-Output $destFilePath
		New-Item -ItemType File -Path $destFilePath -Force
		Move-Item -Path $fileName.FullName -Destination $destFilePath -Force -ErrorAction SilentlyContinue -ErrorVariable errors
		If ($errors) {
			ForEach($error in $errors)
			{
				if ($error.Exception -ne $null)
				{
					Write-Host -ForegroundColor Red "Exception: $($error.Exception)"
				}
				Write-Host -ForegroundColor Red "Error: An error occurred during move operation."
				Remove-Item -Path $destFilePath -Force
				$excludeList.Add("*$($fileName.Name)")
			}
		} Else {
			Write-Output "Move complete."
			$global:fileCount++ # Increment file count, then check if max is hit
			If ($global:fileCount -ge $fileArchiveLimit) {
				Write-Output "Archive max file moves limit reached."
				Write-Output "Done."
				Exit
			} Else {
				Write-Output "That was file number: $global:fileCount"
			} 	
		}
		Write-Output "`n"
	}

}

If (CheckSSDAbove($ssdMaxUsedPercent)) {
	While (CheckSSDAbove($ssdMinUsedPercent)) {
		Write-Output "---------------------------------------"
		Write-Output "SSD is at $global:ssdUsedPercent%."
		Write-Output "Max is $ssdMaxUsedPercent%."
		Write-Output "Archiving files."
		MoveOldestFiles
		Write-Output "---------------------------------------"
	}
} Else {
	Write-Output "---------------------------------------"
	Write-Output "SSD is at $global:ssdUsedPercent%."
	Write-Output "Max is $ssdMaxUsedPercent%."
	Write-Output "Drive not above max used."
	Write-Output "---------------------------------------"
}

Write-Output "COMPLETE"
Write-Output "---------------------------------------"
Exit

Hey. Do you still use this script and has it been working well for you?

I switched to Unraid about a year ago, but it worked great before that!