c00753663
 
HP Tru64 UNIX - WWID Change After 1/8 Autoloader Firmware Upgrade to v1.50 or N14r

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 Advisory Information
 

RELEASE DATE: 2006-08-31

DESCRIPTION
A firmware upgrade to v1.50 or N14r on the 1/8 Autoloader causes the WWID presented to the HP Tru64 Operating System to change. As a result of the WWID change, the existing device associated with the media changer is no longer accessible. (The Scope section of this Advisory provides specifics on the Autoloader products and firmware revisions involved.)

The problem occurs because the new identifier causes Tru64 UNIX to detect the device as a new device. Upon the next device probe (reboot, hwmgr scan, or other operation), the operating system creates a new media changer special device file.

Customers planning to upgrade 1/8 Autoloader firmware to 1.50 or N14r can resolve the problem by following the steps outlined in the Resolution section of this Advisory.
 

SCOPE

The following Autoloader products are affected when upgrading to the firmware identified below:

  • LTO 232 Autoloader: AF202A v1.50
  • LTO 448 Autoloader: AF203A v1.50
  • LTO 960 Autoloader: AF204A v1.50
  • SDLT320 Autoloader: AA926A N14r
  • LTO 460 Autoloader: AA927A N14r

The following supported versions of the operating system are affected:

  • 5.1B-3
  • 5.1B-2/PK4
  • 5.1A PK6
 
RESOLUTION

Customers planning to upgrade 1/8 Autoloader firmware should follow these steps.

1. Before the upgrade, enter the following command and record the HWID and Device File values:

 hwmgr -show scsi -type changer

      SCSI              DEVICE DEVICE  DRIVER NUM  DEVICE FIRST
HWID: DEVICEID HOSTNAME TYPE   SUBTYPE OWNER  PATH FILE   VALID PATH
--------------------------------------------------------------------
 152: 2        ssdc15   changer none   0      1    mc8    [4/5/1]
 

2. Update to v1.50 or N14r firmware.

3. Enter the following commands.

For a nonclusterd system, use:

hwmgr -scan component
evmwatch -f '[name sys.unix.*]' | evmshow|grep "hardware scan"

Wait for the host to report scan completed with the following message:

A hardware scan has just completed

For a clustered system, add the -cluster switch to the hwmgr command:

hwmgr -scan component -cluster
evmwatch -f '[name sys.unix.*]' | evmshow|grep "hardware scan"

Wait for all members to complete the scan.

4. Enter the following hwmgr command and record the results:

hwmgr -show scsi -type changer

      SCSI              DEVICE DEVICE  DRIVER NUM  DEVICE FIRST
HWID: DEVICEID HOSTNAME TYPE   SUBTYPE OWNER  PATH FILE   VALID PATH
--------------------------------------------------------------------
 152: 2        ssdc15   changer none   0      1    mc8
 153: 3        ssdc15   changer none   0      1    mc11   [4/5/1]

In this example, device file mc11 HWID 153 will be reassigned back to HWID 152 device file mc8 by performing the remaining command sequences. The HWID and DEVICE FILE values are configuration specific. Record the results from the hwmgr command.

5. Delete HWID from the previous mc8 assignment:

hwmgr -delete component -id 152

6. Reassign HWID 153 mc11 to mc8 device file:

dsfmgr -m mc11 mc8

7. Verify proper assignment:

hwmgr -show scsi -type changer

      SCSI              DEVICE DEVICE  DRIVER NUM  DEVICE FIRST
HWID: DEVICEID HOSTNAME TYPE   SUBTYPE OWNER  PATH FILE   VALID PATH
--------------------------------------------------------------------
 153: 3        ssdc15   changer none   0      1    mc8    [4/5/1]