Using rmdbsp command for SSP:

Example:
$ lsmap -all
SVSA            Physloc                                      Client Partition ID
--------------- -------------------------------------------- ------------------
vhost0          U7778.23X.06BC7DA-V1-C11                     0x00000002

VTD                   vtscsi0
Status                Defined
LUN                   0x8100000000000000
Backing device        client_rtvg_vht0.626a8d2721a1c82ea6f249db71d2aa76
Physloc
Mirrored              N/A

VTD                   vtscsi1
Status                Available
LUN                   0x8200000000000000
Backing device        rajtest_lu.b60808789896ce984d8de79768781c63
Physloc
Mirrored              N/A

Commands:
$ rmbdsp -vtd vtscsi0 -f
$ rmbdsp -vtd vtscsi1 -f

////////////////////////////////////////////
Below if accidently rmdev has been used 
////////////////////////////////////////////
For SSP so do not use any rmdev command available for vhost adapter.
For SSP use the SSP commands to make sure they take care of the problem. ( Type rmbdsp for help )


Correct Sequence is Only:
 $ rmbdsp -sp  -bd  -f


If rmdev -dev vhost has been used by accident then to cvorrect this:

$ oem_setup_env
  # rm /var/vio/storagepools/fb_client_pool/aixsnd2_hdisk0
  # rm /var/vio/storagepools/fb_client_pool/.aixsnd2_hdisk0