Hi,

have an issue which is probably HW related on Linux (RHEL). I am not able to see the robotic arm in the output of scan command:

The scan shows me only the tape driver:
mphgt30# /usr/openv/volmgr/bin/scan
************************************************************
*********************** SDT_TAPE    ************************
*********************** SDT_CHANGER ************************
*********************** SDT_OPTICAL ************************
************************************************************
------------------------------------------------------------
Device Name  : "/dev/st/nh0c0t4l0"
Passthru Name: "/dev/sg/h0c0t4l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "QUANTUM SDLT600         2B2B"
Vendor ID  : "QUANTUM "
Product ID : "SDLT600         "
Product Rev: "2B2B"
Serial Number: "QP0720AMC00185"
WWN          : "QUANTUM SDLT600         QP0720AMC001"
WWN Id Type  : 1
Device Identifier: "QUANTUM SDLT600         QP0720AMC00185  "
Device Type    : SDT_TAPE
NetBackup Drive Type: 9
Removable      : Yes
Device Supports: SCSI-4
Flags : 0x4
Reason: 0x0

Output of the tpconfig :
mphgt30# /usr/openv/volmgr/bin/tpconfig -d
Index DriveName              DrivePath                Type    Shared   Status
***** *********              **********               ****    ******   ******
  0   Drive0                 /dev/st/nh0c0t4l0        8mm      No       UP
    TL8(0) Definition    DRIVE=1

Currently defined robotics are:
  TL8(0)     robotic path = /dev/sg/h2c0t2l0,
             volume database host = mphgt30-br

If I probe the robotic arm I got errors:
mphgt30# /usr/openv/volmgr/bin/robtest
Configured robots with local control supporting test utilities:
  TL8(0)     robotic path = /dev/sg/h2c0t2l0

Robot Selection
---------------
  1)  TL8 0
  2)  none/quit
Enter choice: 1

Robot selected: TL8(0)   robotic path = /dev/sg/h2c0t2l0

Invoking robotic test utility:
/usr/openv/volmgr/bin/tl8test -r /dev/sg/h2c0t2l0 -d1 /dev/st/nh0c0t4l0

Opening /dev/sg/h2c0t2l0
user_scsi_sense failed 1h
sense key = 0x5, asc = 0x24, ascq = 0x0, INVALID FIELD IN CDB
Enter tl8 commands (? returns help information)
init
Initiating INITIALIZE_ELEMENT_STATUS
user_scsi_sense failed 1h
sense key = 0x5, asc = 0x20, ascq = 0x0, INVALID COMMAND OPERATION CODE

This is the output of dmesg | grep scsi:
scsi : aborting command due to timeout : pid 4, scsi0, channel 0, id 4, lun 0 Inquiry 00 00 00 ff 00
mptscsih: ioc0: id=4 OldAbort: unknown target (sc=f7501000)
mptscsih: ioc0: id=4 OldReset: scheduling BUS_RESET SCSI IO (sc=f7501000)
mptscsih: ioc0: id=4 OldReset: scheduling BUS_RESET SCSI IO (sc=f7501000)

This is the output of cat /proc/scsi/scsi : 

# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 04 Lun: 00
  Vendor: QUANTUM  Model: SDLT600          Rev: 2B2B
  Type:   Sequential-Access                ANSI SCSI revision: 04
Host: scsi2 Channel: 00 Id: 02 Lun: 00
  Vendor: LSILOGIC Model: Logical Volume   Rev: 3000
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 00
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 01
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 02
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 03
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 04
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 05
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 06
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 07
  Vendor: TEAC     Model: DW-224SL-R       Rev: 1.0B
  Type:   CD-ROM                           ANSI SCSI revision: 02

The st and sg modules are loaded:
mphgt30# lsmod | egrep 'st|sg'
sg                     37292   0  (autoclean)
st                     31556   0  (unused)
scsi_mod              116140   5  [sg ide-scsi st mptscsih sd_mod]

The modules.conf have:

options scsi_mod max_scsi_luns=255

What do you suggest ? Check cables or termination ?

Thanks,

Jorge