请问下，为什么不能加载磁带呢

[renrenaini]

ob> loadvol -D tape03 -m write 1
Error: can't execute command - empty storage element encountered during swap

ob> loadvol -D tape03 -m write 1
Error: can't execute command - device offline

请问下，为什么不能加载磁带呢。初学求赐教。找了资料，还是没解决。
以下信息供参考

ob> lsvol -L lib01 -l
Inventory of library lib01:
in 1: vacant
in 2: barcode E01002L4, oid 101, mediainfo none
in 3: barcode E01003L4, oid 102, mediainfo none
in 4: barcode E01004L4, oid 103, mediainfo none
in 5: vacant
in 6: barcode E01006L4, oid 105
in 7: barcode E01007L4, oid 106
in 8: barcode E01008L4, oid 107
in 9: barcode E01009L4, oid 108
in 10: barcode E01010L4, oid 109
in 11: barcode E01011L4, oid 110
in 12: barcode E01012L4, oid 111
in 13: barcode E01013L4, oid 112
in 14: barcode E01014L4, oid 113
in 15: barcode E01015L4, oid 114
in 16: barcode E01016L4, oid 115
in 17: barcode E01017L4, oid 116
in 18: barcode E01018L4, oid 117
in 19: barcode E01019L4, oid 118
in 20: barcode E01020L4, oid 119
in 21: vacant
in 22: barcode CLN101L4, oid 120
in 23: barcode CLN102L5, oid 121
in 24: vacant
in 25: vacant
in 26: vacant
in 27: vacant
in 28: vacant
in 29: vacant
in 30: barcode F01030L5, oid 122
in 31: barcode F01031L5, oid 123
in 32: barcode F01032L5, oid 124
in 33: barcode F01033L5, oid 125
in 34: barcode F01034L5, oid 126
in 35: barcode F01035L5, oid 127
in 36: barcode F01036L5, oid 128
in 37: barcode F01037L5, oid 129
in 38: barcode F01038L5, oid 130
in 39: barcode F01039L5, oid 131
in iee1: vacant
in iee2: vacant
in iee3: vacant
in iee4: vacant
in dte1: barcode E01005L4, oid 104, lastse 5, mediainfo none
in dte2: barcode E01001L4, oid 100, lastse 1, mediainfo
in dte3: vacant
in dte4: vacant


ob> lsdev -g tape03
tape03:
Device type: tape
Model: [none]
Serial number: XYZZY_A3
In service: yes
Library: lib01
DTE: 1
Automount: yes
Error rate: 8
Query frequency: 131072KB (134217728 bytes) (from driver)
Debug mode: no
Blocking factor: (default)
Max blocking factor: (default)
Current tape: 5
Use list: all
Drive usage: none
Cleaning required: no
UUID: 48d1ca4a-62f9-1033-ab59-0050562b3312
Attachment 1:
Host: station10
Raw device: /dev/sg4
Connection type: SCSI
Inquiry data:
Vendor: IBM
Product: ULT3580-TD4
Firmware: 0102
Serial number: XYZZY_A3
Tape state: offline
Hardware compression: on
Last read was: uncompressed
Hardware encryption: not available
Maximum block size: 1048576
ob>





[root@station10 ~]# lsscsi -g
[0:0:0:0] disk VMware, VMware Virtual S 1.0 /dev/sda /dev/sg0
[2:0:0:0] cd/dvd NECVMWar VMware SATA CD01 1.00 /dev/scd0 /dev/sg1
[31:0:0:0] mediumx STK L700 0102 - /dev/sg10
[31:0:1:0] tape IBM ULT3580-TD5 0102 /dev/st0 /dev/sg2
[31:0:2:0] tape IBM ULT3580-TD5 0102 /dev/st1 /dev/sg3
[31:0:3:0] tape IBM ULT3580-TD4 0102 /dev/st2 /dev/sg4
[31:0:4:0] tape IBM ULT3580-TD4 0102 /dev/st3 /dev/sg5
[31:0:8:0] mediumx STK L80 0102 - /dev/sg11
[31:0:9:0] tape STK T10000B 0102 /dev/st4 /dev/sg6
[31:0:10:0] tape STK T10000B 0102 /dev/st5 /dev/sg7
[31:0:11:0] tape STK T10000B 0102 /dev/st6 /dev/sg8
[31:0:12:0] tape STK T10000B 0102 /dev/st7 /dev/sg9