How to determine drive serial number and OS device path using the scan command

Article:TECH32741  |  Created: 2004-01-23  |  Updated: 2013-10-24  |  Article URL http://www.symantec.com/docs/TECH32741
Article Type
Technical Solution


Environment

Issue



Using tools available as a part of Netbackup, the drive location within the library and operating system can be correlated.


Cause



In order for the device configuration wizard to properly configure the location of the drives within the library, the serial number is used to correlate the tape device location on the attached host and the bay within the library.


Solution



Determine the Serial Number and location of the tape drives within the library on the Robotic Control Host:

/usr/openv/volmgr/bin/goodies/scan -changer

This command will yield output similiar to the example below:  

************************************************************
*********************** SDT_CHANGER ****************
************************************************************
------------------------------------------------------------
Device Name  : "/dev/sg/c1t2l0"
Passthru Name: "/dev/sg/c1t2l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "STK     L180            0301"
Vendor ID  : "STK     "
Product ID : "L180            "
Product Rev: "0301"
Serial Number: "MPC02202208"
WWN          : ""
WWN Id Type  : 0
Device Identifier: ""
Device Type    : SDT_CHANGER
NetBackup Robot Type: 8
Removable      : Yes
Device Supports: SCSI-3
Number of Drives : 4
Number of Slots  : 84
Number of Media Access Ports: 10
Drive 1 Serial Number      : "CXA27S3726"
Drive 2 Serial Number      : "CXA28S0192"
Drive 3 Serial Number      : "331000038209"
Drive 4 Serial Number      : "331000037733"

Flags : 0x0
Reason: 0x0

This shows that this robot has four drives and the drives are giving serial number information.
This serial number can be mapped to the actual device file using the output from the scan command with the tape argument. If you do not see this drive serial number information, then the drive is not serializing or is an API robot,  such as Automated Cartridge System Library Software (ACSLS) or Tape Library Multimedia (TLM).

On the Media Server (which may be the same as the Robotic Control Host), run the following command:

/usr/openv/volmgr/bin/goodies/scan -tape

************************************************************
*********************** SDT_TAPE    ************************
************************************************************
------------------------------------------------------------
Device Name  : "/dev/rmt/2cbn"
Passthru Name: "/dev/sg/c1t0l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "STK     9840            1.34"
Vendor ID  : "STK     "
Product ID : "9840            "
Product Rev: "1.34"
Serial Number: "331000038209"
WWN          : ""
WWN Id Type  : 0
Device Identifier: ""
Device Type    : SDT_TAPE
NetBackup Drive Type: 3
Removable      : Yes
Device Supports: SCSI-3
Flags : 0x4
Reason: 0x0
------------------------------------------------------------
Device Name  : "/dev/rmt/3cbn"
Passthru Name: "/dev/sg/c1t1l0"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "STK     9840            1.34"
Vendor ID  : "STK     "
Product ID : "9840            "
Product Rev: "1.34"
Serial Number: "331000037733"
WWN          : ""
WWN Id Type  : 0
Device Identifier: ""
Device Type    : SDT_TAPE
NetBackup Drive Type: 3
Removable      : Yes
Device Supports: SCSI-3
Flags : 0x4
Reason: 0x0
------------------------------------------------------------
Device Name  : "/dev/rmt/4cbn"
Passthru Name: "/dev/sg/c1t2l1"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "QUANTUM DLT7000         276A"
Vendor ID  : "QUANTUM "
Product ID : "DLT7000         "
Product Rev: "276A"
Serial Number: "CXA27S3726"
WWN          : ""
WWN Id Type  : 0
Device Identifier: ""
Device Type    : SDT_TAPE
NetBackup Drive Type: 9
Removable      : Yes
Device Supports: SCSI-2
Flags : 0x4
Reason: 0x0
------------------------------------------------------------
Device Name  : "/dev/rmt/5cbn"
Passthru Name: "/dev/sg/c1t2l2"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry    : "QUANTUM DLT7000         276A"
Vendor ID  : "QUANTUM "
Product ID : "DLT7000         "
Product Rev: "276A"
Serial Number: "CXA28S0192"

WWN          : ""
WWN Id Type  : 0
Device Identifier: ""
Device Type    : SDT_TAPE
NetBackup Drive Type: 9
Removable      : Yes
Device Supports: SCSI-2
Flags : 0x4
Reason: 0x0
#

Using the command scan -changer you can identify which device name is associated with with robotic drive referencing the scan -tape output and matching serial numbers.  

Drive 1 Serial Number      : "CXA27S3726"    is configured as /dev/rmt/4cbn
Drive 2 Serial Number      : "CXA28S0192"    is configured as /dev/rmt/5cbn
Drive 3 Serial Number      : "331000038209"  is configured as /dev/rmt/2cbn
Drive 4 Serial Number      : "331000037733"  is configured as /dev/rmt/3cbn


Legacy ID



268882


Article URL http://www.symantec.com/docs/TECH32741


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