"Attached Changer" of tapeinfo command doesn't indicate correct information.

Issue

• An application vendor is configuring Backup Software named Zmanda but they fails to configure backup job.
• The application vendor insists this failure is caused by that OS (RHEL4) cannot recognize tape changer (DELL PowerVault TL2000) properly showing the result of "tapeinfo" command.
• But we can operate tape changer via web interface of TL2000 properly.

• Do you know any command to prove tape changer is properly configured by OS?

  # tapeinfo -f /dev/sg3
  Product Type: Tape Drive
  Vendor ID: 'IBM '
  Product ID: 'ULT3580-TD3 '
  Revision: '93G6'
  Attached Changer: No
  SerialNumber: '1210422339'
  MinBlock:1
  MaxBlock:16777215
  SCSI ID: 4
  SCSI LUN: 0
  Ready: yes
  BufferedMode: yes
  Medium Type: 0x38
  Density Code: 0x44
  BlockSize: 0
  DataCompEnabled: yes
  DataCompCapable: yes
  DataDeCompEnabled: yes
  CompType: 0x1
  DeCompType: 0x1
  BOP: yes
  Block Position: 0