Ok, some of the possibilities.
1) All the LUNs in the text file
$luns=Get-Contentluns.txt
$luns|%{ $e01.storage.core.device.detached.remove($_) }
2) The first 5 LUNs
$e01.storage.core.device.detached.list() |
Select-First5|%{ $e01.storage.core.device.detached.remove($_) }
3) The last 5 LUNs
$e01.storage.core.device.detached.list() |
Select-Last5|%{ $e01.storage.core.device.detached.remove($_) }
4) 5 randomly selected LUNs
$e01.storage.core.device.detached.list() |
Get-Random-Count5|%{ $e01.storage.core.device.detached.remove($_) }