Preventing System Volume Information buildup

article #1507, updated 101 days ago

The overall cause of buildup of orphan shadows in “System Volume Information” folders, is physical storage not being able to keep up with demand.

The best first steps I have, are to run what I sometimes call general cleanup. After that, I run PrivaZer without checking traces in free space, which saves time and does not affect performance results. PrivaZer cleans up an amazing variety of NTFS issues, even new installs often benefit.

And after that, three registry entries. Here’s Powershell code to get them in and engaged.

$NewMaxShadowCopies = 8
$NewMinDiffAreaFileSize = 128

# http://www.tomsitpro.com/articles/powershell_registry-powershell_command_line,2-152.html

function setupDWORD {
    param( [string]$regPath, [string]$nameForDWORD, [long]$valueForDWORD )

    ##############
    # Error out if cannot touch the registry area at all
    If ( !(Test-Path $regPath) ) {
        Try {
            New-Item $regPath -Force -ErrorAction SilentlyContinue
            }
        Catch {
            Write-Error ("Could not visit or create registry path " + $regPath)
            Return
            }
        }

    #############
    # If an existing registry entry exists, store its value to report later
    Try {
        $oldValueProperty = Get-ItemProperty -Path $regPath -Name $nameForDWORD -ErrorAction SilentlyContinue
        $oldValue = $oldValueProperty.$nameforDWORD
        }
    Catch {
        $oldValue = ""
        }

    #############
    # Report the changes to make
    Write-Output ("DWORD to write: " + $nameForDWORD)
    Write-Output ("at registry path " + $regPath)
    If ($oldValue -ne "") {
        Write-Output ("Original value is " + $oldValue)
        }
    else {
        Write-Output "No original present."
        }
    Write-Output ("New value is " + $valueforDWORD)

    ############
    # Report no changes to make, set new registry entry, or error out
	If ($oldValue -eq $valueforDWORD) {
		Write-Output "No change to make."
		""
		Return
		}
    Try {
        New-ItemProperty -Path $regPath -Name $nameForDWORD -Value $valueForDWORD -PropertyType DWORD -Force -ErrorAction SilentlyContinue > $null
        }
    Catch {
        Write-Error "Failed!"
        ""
        Return
        }

    "Succeeded!"
    ""
    }

setupDWORD "HKLM:\System\CurrentControlSet\Services\VSS\Settings" "MaxShadowCopies" $NewMaxShadowCopies

setupDWORD "HKLM:\System\CurrentControlSet\Services\VolSnap" "MinDiffAreaFileSize" $NewMinDiffAreaFileSize

setupDWORD 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows' 'DeleteStaleTaskCache' 1

""

"Restarting VSS..."

Restart-Service -Force -Name "VSS"

""

"Complete!"
""

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