Solaris 7 to 8 Upgrade with Oracle 8.1.5 (opinions and issues to note)

Hi all,
Think the subject says it all..
I have a Solaris 7 server running on Sparc E250 with Oracle8.1.5 on it. It shows that it s a 64bit system when booting up and it uses normal Solaris filesystem setup (no RAID on it) .
If I were to upgrade it to Solaris 8, what are the issues I need to take note.
Thanks.
Ld

This could be a big headache....but if there is a need to upgrade your OS from 7 to 8
then you should be ready for a good backup plan....meaning, if something goes wrong at any
point in the process, you could easily revert back to your old system environment.
If I were the one to do this, I will do the following.
1) I will make use of mirroring. It will be good if you could do it for the entire filesystem
of your OS and your DB.
2) Once I have a mirror, I will simply detach the other mirror and do my upgrade.
Anything goes wrong, I will simply make use of the other mirror to have my old system back.
When you upgrade your OS from 7 to 8, I had seen lots of problem where it could not complete the
process. And the reason is the size of the Filesystem for Solaris 8 specially the root requires
a big size as to any previous version. i usually just install from scratch. But the problem is if
your filesystem for the OS and Applications like your DB are crossing each other then you may have
to rebuilt your Applications too. Unless you had partition them such that they are totally separated.
When you had succesfully installed your Solaris 8, then your next headache is to make sure
all your applicatiions including your DB will be running fine with the new OS. Usually they
would not as they may need to be patched. So that means you have to check the Oracle websites
as for what are the patches needed to make your Oracle runs properlly in the new OS.
Most important is your backup plan, which is your mirrored-disk of your running environment.
Also you have to make a Plan of everything. Doing this will really take a lot of time.
Good luck. I have done this before.....I'm pretty sure you could do it.
just remember , your back-up plan should always be available anytime.

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