Here’s a useful powermt
command to use to clear PowerPath errors after removing LUNs from a host. Note that you will prompted whether to remove each possible path to the target, usually 2 to 4 times per LUN.
Microsoft Windows [Version 6.1.7600] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:Windowssystem32>powermt check Warning: CLARiiON device path c0t0d11 is currently dead. Do you want to remove it (y/n/a/q)? y Warning: CLARiiON device path c0t1d11 is currently dead. Do you want to remove it (y/n/a/q)? y Warning: CLARiiON device path c1t0d11 is currently dead. Do you want to remove it (y/n/a/q)? y Warning: CLARiiON device path c1t1d11 is currently dead. Do you want to remove it (y/n/a/q)? y C:Windowssystem32>