I can see ONLY 24 tapes in my SL48 Tape Library in RHEL 5.10

[jgglez79]

I have a SL48 Tape Library connected to my RHEL 5.10 x86_64 bit Server using parallel SCSI. My Server detect the library tape, but I can see only 24 of 48 tapes.

[root@backup ~]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: HP Model: Ultrium 4-SCSI Rev: B49W
Type: Sequential-Access ANSI SCSI revision: 05
Host: scsi0 Channel: 00 Id: 05 Lun: 01
Vendor: HP Model: MSL G3 Series Rev: F.80
Type: Medium Changer ANSI SCSI revision: 05

[root@backup ~]# lsscsi
[0:0:5:0] tape HP Ultrium 4-SCSI B49W /dev/st0
[0:0:5:1] mediumx HP MSL G3 Series F.80 -
[1:0:0:0] disk IBM SERVERAID 1.00 /dev/sda
[1:0:1:0] disk IBM SERVERAID 1.00 /dev/sdb
[1:0:15:0] process IBM SERVERAID 1.00 -
[1:2:8:0] process IBM 02R0962a S320 1 1 -
[3:0:0:0] disk IBM 1815 FAStT 0914 -
[3:0:1:0] disk IBM 1815 FAStT 0914 -

[root@backup ~]# mtx -f /dev/sg1 status
Storage Changer /dev/sg1:1 Drives, 24 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Unknown Storage Element Loaded):VolumeTag = 000026L4
Storage Element 1:Empty
Storage Element 2:Full :VolumeTag=000001L4
Storage Element 3:Full :VolumeTag=000004L4
Storage Element 4:Full :VolumeTag=000017L4
Storage Element 5:Full :VolumeTag=000027L4
Storage Element 6:Full :VolumeTag=000002L4
Storage Element 7:Full :VolumeTag=000015L4
Storage Element 8:Full :VolumeTag=000018L4
Storage Element 9:Full :VolumeTag=000000L4
Storage Element 10:Full :VolumeTag=000003L4
Storage Element 11:Full :VolumeTag=000016L4
Storage Element 12:Full :VolumeTag=000019L4
Storage Element 13:Full :VolumeTag=000010L4
Storage Element 14:Full :VolumeTag=000013L4
Storage Element 15:Full :VolumeTag=000006L4
Storage Element 16:Full :VolumeTag=000009L4
Storage Element 17:Full :VolumeTag=000011L4
Storage Element 18:Full :VolumeTag=000014L4
Storage Element 19:Full :VolumeTag=000005L4
Storage Element 20:Full :VolumeTag=000008L4
Storage Element 21:Full :VolumeTag=000012L4
Storage Element 22:Full :VolumeTag=000028L4
Storage Element 23:Full :VolumeTag=000029L4
Storage Element 24:Full :VolumeTag=000007L4

What would be wrong?