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List:       adsm-l
Subject:    Celerra tape device names for NDMP
From:       Robben Leaf <robben.leaf () USBANK ! COM>
Date:       2008-03-28 16:34:23
Message-ID: OF53357E51.2D707DA4-ON8825741A.00592380-8625741A.005B0A0A () usbank ! com
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I'm setting up NDMP backups for a Celerra; the TSM server to which it will
be backed up is the library controller, and the library is an EMC VTL,
emulating an IBM 3584.

I've presented four tape drives to the Celerra from the VTL - one HBA on
the Celerra is zoned to two HBA's on the VTL, and two drives are presented
down each path. In order to correctly set up the paths on the TSM server, I
need to know which device name on the Celerra corresponds to which drive in
the VTL. The device names on the Celerra look like this:

c128t0l0
c128t0l1
c144t0l0
c144t0l1

Now, I know that the last two characters refer to the LUN numbers, and
since I know which drives are presented with which LUN numbers, this gives
me a 50-50 chance of getting it right if I just guess. The c### part seems
to be a chain or scsi controller number. Interestingly, all of the chain
numbers I've seen from the Celerra were divisible by 16.

Does anyone know how to find a connection between the chain numbers in the
Celerra and the port ID's or WWN's on the VTL? Or am I reduced to making a
guess, and if it doesn't work, trying it the other way around?

If it helps, here are the WWN's and port ID's (in hex and decimal) and
adapter numbers over which the drives are presented from the VTL:

21-03-00-0d-77-fe-61-08       61.18.13          97.24.19          Adapter 1
21-03-00-0d-77-be-61-08       61.14.13          97.20.19          Adapter 3

Any help is appreciated!

Robben Leaf


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