From the command line it runs fine, from powershell I get the error:
"wbadmin 1.0 - Backup command-line tool (C) Copyright 2004 Microsoft
Corp.  Retrieving volume information...   ERROR - One of the source
volumes specified cannot be included: C: E:. Please  specify source as
a volume drive letter or access path (if volume is mounted  in a
folder). Only volumes on locally attached disks can be backed up."

C and E are both physical drives located inside the server.  G is an
external USB drive.

Why does it not work in Powershell?

Rick

I don't use wb but the Win2008 admin pocket guide shows that the -include
switch expects a comma-delimited list if more than one source is specified.

  * -include  Sets a comma-delimited list of
    volume drive letters, volume mount points,
    and GUID volume names to back up.

In your case this should be:

-include:C:,E:

See the example on page 481.

Joe Morris

The missing comma was a typo.  I did have it in the code that gave the
error.

The problem was solved by putting the -include into a variable -
apparently ps was confused by the inline assignment.

$include = "C:,E:"
wbadmin start backup -include:$include ...

Rick