I have my response it's impossible.

Now i have more question ^^

If i create new tapepool named by exemple TAPEPOOL2 with disk, can i migrate 
the actual diskpool to the new TAPEPOOL2 (disk)

If it's possible to performe move data AXXXXXX (from tapepool) to stg=TAPEPOOL2 
?

The goal of that it's to remplace the actual tapepool from tape to tapepool2 
disk (one of drive are down and the second was tired) it's just a tempory 
solution to continue to save the data just before to export nodedata to the new 
TSM server with LTO6 tape library (actually TSM LTO3 with one HS drive and 
second tired drive)

Thanks for reply.

Regards, Mickael

+----------------------------------------------------------------------
|This was sent by bobpatrick808182 AT yahoo DOT fr via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------