Re: What are the concerns about performing a slip install?

I think you need to be clear on why you are doing this and what you are
trying to achieve.
I've done a few SLIP installs over the journey but generally only when
indicated by IBM service or documentation
(e.g. hardware requires specific resave level of LIC, directed by TR
documentation, or from a service call)

You can SLIP install just LIC or just the OS, it's not necessarily both:
https://www.ibm.com/support/pages/steps-slip-install-licensed-internal-code
https://www.ibm.com/support/pages/steps-slip-install-operating-system

If this is related to the PTF error you posted on here about, you probably
want to resolve that first, or be clear on what is causing that error.
Were you able to log a call with IBM for the PTF issue, if so, what was
their diagnosis ?

I'm probably telling you how to suck eggs, but have a good full system save
or verify your backups are what you think they are....


On Mon, Jan 6, 2025 at 5:02 AM Rob Berendt <robertowenberendt@xxxxxxxxx>
wrote:

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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