AIX 5 upgrade issue (IBM confirms)
From: Bill (bverzal_at_komatsuna.com)
Date: 11/11/03
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Date: 11 Nov 2003 09:18:17 -0800
I upgraded my H-80 to AIX 5.2 this weekend. I thought I'd inform you
of a PMR I had to open with IBM and the result of the call.
When the migration install finished, the system rebooted and went to
"AIX is starting". Then it gave me a nice empty stare. For a long
time.
No disk activity, so I rebooted again (after about 30-minutes). Same
thing.
So I called IBM and here is what we found.
"There exists, under certain conditions, a situation where a migrated
server will not reboot after a migration."
Yup - the install will fail. You'll need to reload a mksysb and start
again. The fix ?
Unmirror rootvg first.
The AIX 5.2 migration MIGHT die if you migrate a mirrored rootvg.
The developers at IBM are not yet sure what the problem is. They are
considering writing this into the migration guide at this point.
Symptoms: System will not boot
Fixes: Run fsck, synclvodm, etc - none will fix the problem. Nothing
will work, even though the commands run fine (and might even fix
something)
Fortunately, in my case, I was not affected by this particular bug.
In my case however, here is what happened to me:
On the /SPOT, /etc/filesystems had no entry for "/tmp" in it, so I
had to "grep -p" and "sed" to create a new entry and append it to
/etc/filesystems
Then, I could run "fsck" on /tmp. At this point, we were not sure if
my system had "the bug" or not. So watch for the missing "/tmp".
My bos.mp was still 4.3.3.75 and did not migrate.
My devices.ssa.disk.rte was still 4.3.3.x and did not migrate.
Trying to install the filesets in "recovery" mode failed because the
script "/usr/lib/instl/rminstal" failed. We placed an "exit 0" in
that script and the install worked fine.
Once we set the bootlist and fixed the above problems, the system
booted fine.
So, simply put, have a mksysb or 2, and unmirror rootvg before you
start and AIX 5.2 migrations.
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