Thanks for your help, the media and master server are in AIX.
I ran the comand and this is what showed:
vmoprcmd -devconfig -l
Device Robot Drive Robot Drive Device
Type Num Index Type DrNum Status Comment Name Path
robot 1 - ACS - - - - speges02
drive - 0 hcart2 - UP - STK.9840C.000 /dev/rmt0.1 ACS=0, LSM=2, PANEL=1, DRIVE=1
drive - 1 hcart3 - DOWN - STK.T10000B.003 /dev/rmt10.1 ACS=0, LSM=0, PANEL=1, DRIVE=1
drive - 2 hcart3 - DOWN - STK.T10000B.004 /dev/rmt6.1 ACS=0, LSM=2, PANEL=1, DRIVE=3
drive - 3 hcart3 - DOWN - STK.T10000B.000 /dev/rmt2.1 ACS=0, LSM=2, PANEL=1, DRIVE=4
drive - 5 hcart - UP - STK.T9940B.000 /dev/rmt3.1 ACS=0, LSM=2, PANEL=1, DRIVE=7
drive - 6 hcart2 - UP - STK.9840C.003 /dev/rmt4.1 ACS=0, LSM=2, PANEL=1, DRIVE=0
drive - 7 hcart2 - UP - STK.9840C.004 /dev/rmt5.1 ACS=0, LSM=2, PANEL=1, DRIVE=2
drive - 9 hcart - UP - STK.T9940B.001 /dev/rmt7.1 ACS=0, LSM=2, PANEL=1, DRIVE=6
drive - 10 hcart3 - UP - STK.T10000B.001 /dev/rmt8.1 ACS=0, LSM=0, PANEL=1, DRIVE=3
drive - 11 hcart3 - UP - STK.T10000B.002 /dev/rmt9.1 ACS=0, LSM=0, PANEL=1, DRIVE=2
In this case the new tape drives are .003 and .004
In Netbackup I ran a job using the new tape drives but the job is stuck at mounting, then I had to cancel it. And in the tape library the tape does not unmount, I have always to use a dismount force in this tape drives.