[Bacula-users] Can't find the tape changer

I'm helping a client with a Linux system.  I see the tape drive, but 
cannot find the tape changer.  Clues please.

 From dmesg:

scsi2 : ioc0: LSI53C1030, FwRev=01032700h, Ports=1, MaxQ=255, IRQ=169
   Vendor: IBM       Model: ULTRIUM-TD3       Rev: 6B20
   Type:   Sequential-Access                  ANSI SCSI revision: 03
   Vendor: DELL      Model: PV-124T           Rev: 0043
   Type:   Medium Changer                     ANSI SCSI revision: 02
st: Version 20040403, fixed bufsize 32768, s/g segs 256
Attached scsi tape st0 at scsi2, channel 0, id 6, lun 0
st0: try direct i/o: yes (alignment 512 B), max page reachable by HBA 
4503599627370495
Attached scsi generic sg0 at scsi0, channel 0, id 8, lun 0,  type 13
Attached scsi generic sg1 at scsi0, channel 2, id 0, lun 0,  type 0
Attached scsi generic sg2 at scsi1, channel 0, id 17, lun 0,  type 13
Attached scsi generic sg3 at scsi1, channel 2, id 0, lun 0,  type 0
Attached scsi generic sg4 at scsi1, channel 2, id 1, lun 0,  type 0
Attached scsi generic sg5 at scsi2, channel 0, id 6, lun 0,  type 1
Attached scsi generic sg6 at scsi2, channel 0, id 6, lun 1,  type 8


cat /proc/scsi/scsi includes this:

Host: scsi2 Channel: 00 Id: 06 Lun: 01
   Vendor: DELL     Model: PV-124T          Rev: 0043
   Type:   Medium Changer                   ANSI SCSI revision: 02

The above makes me think sg6 is the changer... but no luck:

 From mtx and mt:

# mtx -f /dev/sg6 inquiry
Product Type: Medium Changer
Vendor ID: 'DELL    '
Product ID: 'PV-124T         '
Revision: '0043'
Attached Changer: No

# mt -f /dev/st0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x44 (no translation).
Soft error count since last status=0
General status bits on (41010000):
  BOT ONLINE IM_REP_EN


]# mtx -f /dev/sg6 status
mtx: Request Sense: Long Report=yes
mtx: Request Sense: Valid Residual=no
mtx: Request Sense: Error Code=0 (Unknown?!)
mtx: Request Sense: Sense Key=No Sense
mtx: Request Sense: FileMark=no
mtx: Request Sense: EOM=no
mtx: Request Sense: ILI=no
mtx: Request Sense: Additional Sense Code = 00
mtx: Request Sense: Additional Sense Qualifier = 00
mtx: Request Sense: BPV=no
mtx: Request Sense: Error in CDB=no
mtx: Request Sense: SKSV=no
READ ELEMENT STATUS Command Failed



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