Hi All,

I'm looking for advice on regards to a power4 HMC upgrade operation
that we're planning.

It's the first time we're upgrading since the initial implementation.

We're currently at version 3.1.3.

We need ot upgrade to thoses versions, in order to end up with version
3.3.7
- 3.2.6
- 3.3.5
and finally 3.3.7

We have four managed systems (p650) connected to that HMC and two of
those have production partitions.

All the profiles are static, we not moving resources from partitions
during runtime.

I'm looking at upgrading the HMC during working hours.

My questions are:
Does any of those upgrade operations can affect the managed systems ?
Has anyone experience problems with the partitions/profiles during or
after an upgrade ?
Do you think that we could disconnect the serial cables to the managed
system to prevent problem, or it would cause more problems ?

Thanks in advance.

JF Leblond
jfleblond68 AT hotmail DOT com

hi did pretty much what you're intending to do a few months back. a few
comments.

there is zero imapct to the managed servers-of course if you required
the hmc during the upgrade then you cant have it(power off/on a server
for example)

we lost our entire configuration between two of the upgrades, luckily
id written down all the config and just re-entered it. problem was
caused by not reading the doco properly:-) and following the steps
exactly as documented.

otehr than that it was very easy -and quick

> problem was
> caused by not reading the doco properly:-) and following the steps
> exactly as documented.

Did you either not save upgrade data or reboot more than once after
saving upgrade data

I got caught by this one .. if you did run "save upgrade data" then the
data is still there in an unmounted partition .. you can hack it to get
the hmc to re-read the data at reboot fyi ..

Rgds
Mark Taylor