A slip install is where you do a reinstall of lic and just the Base OS
without initializing the system. Prior to TRs this might have to be done
for certain OS upgrades. Namely V5RxM5 and 6.1.1. It was often done if
your PTFs got way behind and you got a link loader error or you just wanted
to be really sure to start somewhat clean before applying PTFs.
Documentation about this is available at
https://www.ibm.com/docs/en/i/7.2?topic=iudirs-replacing-licensed-internal-code-i-same-version-release
What are the concerns about doing this?
First: Commands in which you may have changed the command defaults. Some
people have a program they run to change their defaults after every (IPL,
upgrade, PTF, etc). If not, one technique is to check the column APAR_ID
for CHGDFT in OBJECT_STATISTICS. Prior to that existing, or having the
column APAR_ID (like this 7.2 system I'm looking at) you would DSPOBJD
commands to an outfile and look for
select ODLBNM, ODOBNM, ODOBTP, ODUMOD, ODAPAR
from rberendt.dspcmd
where odapar = 'CHGDFT'
order by odlbnm, odapar desc, odumod desc
What other concerns can you think of?
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