Richard,
If you have Atape multipathing enabled, you may not have to do
anything.
Check using: lsdev -Cc tape
To enable alternate pathing
(From "IBM TotalStorage and System Storage Tape Device Drivers"
Installation and User's Guide - GC35-0154-17)
command: /usr/lpp/Atape/instAtape -a
This will unconfigure all devices that have alternate pathing set to No,
and will reconfigure all devices, setting alternate pathing to Yes.
To enable or disable the support on a single logical device, use the
smit menu to Change/Show Characteristics of a Tape Drive, then select
Yes or No for Enable Alternate Pathing Support.
The support can also be enabled or disabled using the chdev command, for
example: chdev -l rmt0 -aalt_pathing=yes chdev -l rmt0 -aalt_pathing=no
Cheers,
Neil Strand
Storage Engineer - Legg Mason
Baltimore, MD.
(410) 580-7491
Whatever you can do or believe you can, begin it.
Boldness has genius, power and magic.
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Richard Rhodes
Sent: Wednesday, September 24, 2008 2:58 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Changing a library dev on lib path
Hi Everyone,
I have a 3584 library (connected to AIX) for which I need to change the
device file used in the library path. It currently points to /dev/smc0
and I need to change it to /dev/smc4.
When run the following cmd, I am told that the lib is in use . . .
update path tsmlm2 3584isoc srct=serv destt=library device=/dev/smc4
ANR8450E UPDATE PATH: Library 3584ISOC is currently in use.
I then try to put the path offline . . .this works, but the above
command still reports that the lib is is use.
update path tsmlm2 3584isoc srct=serv destt=library online=no
ANR1722I A path from TSMLM2 to 3584ISOC has been updated.
update path tsmlm2 3584isoc srct=serv destt=library device=/dev/smc4
ANR8450E UPDATE PATH: Library 3584ISOC is currently in use.
There ARE tape mounted in some drives. Do I need to get all the drives
offline and demounted to do this?
What do I need to do to change the device of a library path?
What's happening . . . We are upgrading the AIX server this saturday by
adding 2 additional I/O drawers. These drawers will need a
new/additional RIO cable. The RIO cables needs to use the same slot as
one FC adapter (slot 4 of the processor unit), so the FC adapter in slot
4 will be removed. That FC adapter has one set of lib/drives defined on
it, AND, those are the smc/rmt's used on the PATHs in TSM.
I added another fc adapter to the lpar and moved the drive paths to
these new RMT devices, but I'm having trouble moving the lib device.
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