HP DLT8000 SCSI テープドライブが検出されない

Issue

• HP DLT8000 Fast Wide-Diff SCSI テープドライブが認識されないようです。

# cat /proc/scsi/scsi
Attached devices:
     Host: scsi0 Channel: 03 Id: 00 Lun: 00
       Vendor: HP       Model: P410             Rev: 5.76
       Type:   RAID                             ANSI  SCSI revision: 05
     Host: scsi0 Channel: 00 Id: 00 Lun: 00
       Vendor: HP       Model: LOGICAL VOLUME   Rev: 5.76
       Type:   Direct-Access                    ANSI  SCSI revision: 05
     Host: scsi4 Channel: 00 Id: 00 Lun: 00
       Vendor: hp       Model: DVD A  DU8A4SH   Rev: QHE7
       Type:   CD-ROM                           ANSI  SCSI revision: 05

• デバイスに接続されている scsi バスをスキャンしようとすると、ログで中断およびリセットが確認されます。

# echo "- - -" > /sys/class/scsi_host/host5/scan
# tail /var/log/messages
kernel: mptscsih: ioc0: attempting task abort! (sc=ffff8803fecd39c0)
kernel: scsi 5:0:0:0: CDB: Inquiry: 12 00 00 00 24 00
kernel: mptscsih: ioc0: WARNING - Issuing Reset from mptscsih_IssueTaskMgmt!! doorbell=0x24000000
kernel: mptbase: ioc0: ERROR - Doorbell ACK timeout (count=4999), IntStatus=80000000!
kernel: mptbase: ioc0: Initiating recovery
kernel: mptbase: ioc0: ERROR - Doorbell ACK timeout (count=4999), IntStatus=80000000!
kernel: mptscsih: ioc0: task abort: SUCCESS (rv=2002) (sc=ffff8803fecd39c0)
kernel: scsi target5:0:0: asynchronous
kernel: mptscsih: ioc0: attempting target reset! (sc=ffff8803fecd39c0)
kernel: scsi 5:0:0:0: CDB: Inquiry: 12 00 00 00 24 00
kernel: mptscsih: ioc0: target reset: SUCCESS (sc=ffff8803fecd39c0)
kernel: mptscsih: ioc0: attempting bus reset! (sc=ffff8803fecd39c0)
kernel: scsi 5:0:0:0: CDB: Inquiry: 12 00 00 00 24 00
kernel: mptscsih: ioc0: bus reset: SUCCESS (sc=ffff8803fecd39c0)
kernel: mptscsih: ioc0: attempting host reset! (sc=ffff8803fecd39c0)
kernel: mptscsih: ioc0: host reset: SUCCESS (sc=ffff8803fecd39c0)
kernel: scsi target5:0:0: asynchronous
kernel: scsi 5:0:0:0: Device offlined - not ready after error recovery