ok Francis;i'v do what u have telling me to do :
1-the Networker On
2-nsrjb - l -S 12 -f /dev/rmt1.1 <- loading the tape in drive rmt1
3-mt -f /dev/rmt1 status
4-nsrjb - l -S 12 -f /dev/rmt2.1 <- loading the tape in drive rmt2
5-mt -f /dev/rmt2 status


the result is the same in rmt1 or rmt2 :
{ rmt1 or rmt2 } Available 0A-08-02 Other FC SCSI Tape Drive
block_size          0
delay                 45
density_set_1     0
density_set_2     0
extfm                 yes
location       
lun_id                 0x2000000000000
mode                 yes
node_name         0x100000e00203649f
res_support        no
ret_error            no
rwtimeout          144
scsi_id               0x10200
var_block_size   0
ww_name          0x100000e00223649f

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