Tape - How to Replace FC Tape Drives When Using Veritas NetBackup or Legato Networker/Solstice Backup[TM]

Asset ID:	1-71-1009173.1
Update Date:	2011-01-07
Keywords:

Solution Type Technical Instruction Sure

Solution 1009173.1 : Tape - How to Replace FC Tape Drives When Using Veritas NetBackup or Legato Networker/Solstice Backup[TM]

Applies to:

Sun StorageTek L6000 Tape Library
Sun StorageTek 9840B Tape Drive
Sun Storage L100 Tape Library
Sun StorageTek L180 Tape Library
Sun Storage L25 Tape Library
All Platforms

Goal

You have FC-attached tape drives, use Veritas NetBackup or Legato Networker/Solstice Backup[TM], and need to replace one or more of the tape drives.

Solution

Resolution
The correct procedure (including a host reboot) is as follows:

(for Veritas NetBackup)

-1. Shutdown nbu daemons (using "/etc/rc2.d/S77netbackup stop" or equivalent).

-2. Run "cfgadm -c unconfigure cX::(tape drive wwn)" for each tape drive that will be replaced.

-3. Shut down (power-off) the tape library.

-4. Shut down host (touch /reconfigure ; shutdown).

-5. Replace tape drive(s).

-6. Power-on library.

-7. Power-on host.

-8. Either perform "boot -r" or if "touch /reconfigure" was run, just "boot".

-9. Shut down nbu daemons

-10. Run "cfgadm -lav -o show_FCP_dev" to determine what the new tape drive wwns are.

-11. Run sg.build and sg.links to generate a new and correct sg.conf

-12. Copy the new sg.conf to /kernel/drv/sg.conf

-13. cat the sg.links file onto the end of /etc/devlink.tab (using "cat sg.links>> /etc/devlink.tab")

-14. modunload sg driver

-15. modload sg driver

-16. Run /opt/openv/volmgr/bin/sgscan to check that the new tape drives have been discovered by the sg driver, and that the sg driver has attached them.

-17. Start up NBU daemons.

If you do not want to incur host system downtime, you can perform the following procedure instead:

(for Veritas NetBackup)

-1. Shut down NBU daemons (using "/etc/rc2.d/S77netbackup stop" or equivalent).

-2. Run "cfgadm -c unconfigure cX::(tape drive wwn)" for each tape drive that will be replaced.

-3. Shut down (power-off) the tape library.

-4. Replace tape drive(s).

-5. Power-on library.

-6. Run "devfsadm -v -i st" to ensure that the tape drives are correctly recognised by the host.

-7. Run "cfgadm -lav -o show_FCP_dev" to determine what the new tape drive wwns are.

-8. Run sg.build and sg.links to generate a new and correct sg.conf

-9. Copy the new sg.conf to /kernel/drv/sg.conf

-10. cat the sg.links file onto the end of /etc/devlink.tab (using "cat sg.links>> /etc/devlink.tab")

-11. modunload sg driver

-12. modload sg driver

-13. Run /opt/openv/volmgr/bin/sgscan to check that the new tape drives have been discovered by the sg driver, and that the sg driver has attached them.

-14. Start up NBU daemons.

Note:

You can also use "luxadm -e dump_map /path/to/fc/hba" to see what devices are attached to your fc hba. If you are using Solstice Backup / Legato NetWorker then run /etc/rc2.d/S95networker stop to shutdown the daemons. The kernel driver module that needs unloading and reloading is called "lus".

The equivalent of sg.build under NetWorker is the script /usr/sbin/nsr/lus_add_fp_devs

The equivalent of sgscan under NetWorker is the binary /usr/sbin/nsr/inquire

Additional Information
See also:

Problem Resolution < Document: 1006168.1 > Sun StorEdge[TM] fabric environment: Boot errors for fabric-attached devices removed, turned off or undetected.

Product
Sun StorageTek SAN 4.3 Software
Sun StorageTek SAN 4.0 Software
VERITAS NetBackup 5.1
VERITAS NetBackup 5.0 (Localized)
VERITAS NetBackup 5.0 (Japanese)
VERITAS NetBackup 5.0

fc-tape, nbu, netbackup, ebs, sbu, solstice backup, legato, networker, cfgadm, luxadm, configure, unconfigure, replace
Previously Published As 79145

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