This code you give you the concepts you need to collect volumes with no replays.  You can shorten up the code in spots, but I am providing it in long form to demonstrate the concepts.

<# Connection #>

$conn = Get-SCConnection -HostName "sctest" -User Admin

<# Get list of volumes #>

foreach($volume in $(Get-SCVolume -Connection $conn))

{

<# Get replays #>

$volreplays = Get-SCReplay -SourceSCVolume $volume -Connection $conn | where {$_.State -eq "Frozen"} | Sort-Object $_.CreateTime -Descending

if($volreplays.count -eq 0)

{

<# Output volume name #>

$volume.Name

}

}

Good Luck!

Justin