Hello,
this is a known problem. See the link below for more information.
The local fix section includes instructions to resolve this.

http://www-1.ibm.com/support/docview.wss?uid=swg1IC80972

Rejean Larivee
IBM Tivoli Storage Manager Software Support


"ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu> wrote on 04/05/2012
08:15:36 AM:

> From: Murat ORDEKBAY <murat.ordekbay AT COMPRO.COM DOT TR>
> To: ADSM-L AT vm.marist DOT edu
> Date: 04/05/2012 08:17 AM
> Subject: Vmware Restore Process
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
> Hi All,
>
> I resored vmware image on B/A GUI. Operation is successfully. I start
> this new restored server gives "operating system is not found". I
> tried another backed up server, result is same. What can I do for
> this problem.
>
> Thank you
>