StackOverFlow

# Define parameters from text file
cd D:\Desktop\

# Declare an Array to store image paths
$imageArray = @()
$locationArray = @()

# Calculate number of lines within text file
$lines = Get-Content -Path PostBackupCheck-Textfile.txt  | Measure-Object -Line

# Using the .Lines member, create a loop for general functionality.
for ($i=0; $i -le $lines.Lines; $i++)
    {Write-Host "Stage 1: Enumerate Backup Image Information via Powershell"

    #______________________________________________________________________________________
    # Work out drive letter not in use we can mount our SPI to via Function.
    #
    function Get-NextFreeDrive {
    # Pipes letters C-Z into For Loop appending ':'
        68..90 | ForEach-Object { "$([char]$_):" } |
            # Test Exclusions from there Where-Object piped into the System.IO call.
            Where-Object { 'h:', 'k:', 'z:' -notcontains $_ } |
                Where-Object {
                    (new-object System.IO.DriveInfo $_).DriveType -eq 'noRootdirectory'
                }
    }
    #
    #______________________________________________________________________________________

    # Assign variable the function call value piped into a Select first cmdlet.
    $drvWeCanUse = (Get-NextFreeDrive) | select -first 1

    # Scan folders to parse the latest incremental image based on the ShadowProtect naming convention
    # Pass this value to a variable pre-defined and utilise this to mount the ShadowProtect Image Chain via Smart Mount

    Get-Content -Path PostBackupCheck-TextFile.txt | Select-Object -Index $i { $a = $_ -split ' ' ; $locationArray += "$($a[0]):\$($a[1])\$($a[2])" ; $imageArray += "$($a[2])_$($a[3])_VOL_b00$($a[4])_i$($a[5]).spi" }

    $shadowProtectDataLocation = $locationArray[$i]
    $latestIncremental = Get-ChildItem -Path ${shadowProtectDataLocation}\*.* -Include *.spi | Sort-Object LastAccessTime -Descending | Select-Object -First 1
    echo Latest' 'Incremental:' '$latestIncremental


    $locationArray = @()
    $imageArray = @()

   }