We rename our rmt devices, using a script called tsmchrmt, which uses part of
the wwn and lun_id to rename the rmt device. That way the same drive has the
same name on all of the AIX systems that have access to it.
>#!/bin/sh
>
>if [ $# != 1 ]
>then
> /bin/echo "must specify 1 rmt device name as an argument."
> exit 4
>fi
>d=$1
>
>WWN=`/usr/sbin/lsattr -El $d -a ww_name|/bin/cut -f2 -d" "|/bin/cut -c15-`
>LUN=`/usr/sbin/lsattr -El $d -a lun_id|/bin/cut -f2 -d" "|/bin/cut -c3`
>root=`/bin/echo $d|/bin/cut -c1-3`
>new_name=$root.$WWN.$LUN.0
>let "j=0"
>while [[ -e /dev/$new_name ]]
>do
> let "j=j+1"
> new_name=$root.$WWN.$LUN.$j
>done
>/usr/sbin/chdev -l $d -a new_name=$new_name
At 02:31 PM 7/8/2016, Rhodes, Richard L. wrote:
>Hi Everyone,
>
>I'm wondering how others handle lining up tape paths of multiple TSM servers
>in a library sharing environment.
>
>We have a TSM library sharing environment across our TSM instances for sharing
>our two 3584 libraries. One 3584 at each datacenter with a dedicate TSm
>instance for the library manager.
>
>Currently I have a script that crawls through all TSM instances, gets the wwn
>of each rmt device (lsattr -El rmtX), lines up all the wwn/rmt# for a drive
>and creates TSM path commands. Kind of brute force, but has worked very well
>over the years. I can create path cmds for everything in about 15m. But,
>this means that a particular drive can have many different rmtX devices across
>our TSM servers.
>
>A while ago I learned that you can rename a rmtX device (rendev -l rmtX -n
>rmtY). I've been thinking about a new system where I rename the rmtX devices
>on each AIX lpar to a common name.
>
>For example: If a particular lpar has rmt1 which is our "a" 3584, and the
>drive is frame 1 drive 1, then I could call it rmta11. There is atape
>involved with multi paths, so there would also be -pri and -alt versions of
>the name somehow. So this particular drive would have the same AIX device
>name across all AIX lpars.
>
>So, I'm curious . . . What do you do to line up rmt devices?
>Do you rename rmt devices to a common name, or, line up the many different rmt
>devices?
>If you rename rmt devices, what issues/problems have you worked through?
>
>
>Thanks
>
>Rick
>
>
>
>
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--
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IT at Cornell / Infrastructure Em: psz1 AT cornell DOT edu
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