• Subject: Re: Risc-to-Risc upgrade pitfalls
  • From: "Al Barsa, Jr." <barsa2@xxxxxxx>
  • Date: Fri, 07 Jan 2000 12:10:09 -0800

At 04:09 PM 01/07/2000 +0100, you wrote:

>I need some input on upgrading from a RISC box running V3R7 to a new 720 
>V4R4. The source system is a model 400. We plan to upgrade the source 
>system to
>V4R4 in two steps (V3R7->V4R3->V4R4), save the entire system, and restore 
>it to
>the new hardware. We only move the 8mm drive from the source to the target.
>I am particullary interested in  pitfalls not documented in the Roadmap and/or
>advices from experianced people.
You are going about this the right way.  In any save/restore environment, 
you need to be concerned with logical file dependances, and journaling 

A logical file dependency is where the LF is in a library ahead of the 
PF.  In this case the LF will not restore.  You need to go back and then 
re-restore the LF, and the access path will rebuild.  If the LF is in a 
different but later library, the LF will restore normally, but the LF will 
rebuild.  (Be sure to specify ACCPTH(*YES)!)

A journaling dependency is rougher.  A journaling dependency is where the 
journal is in a library later than the PF that it journals.  In that case, 
journaling will be turned off.  If you know your journaling environment, 
you need to restart it.  If you don't know your journaling environment, you 
need to delete the journal and the PF (and of course related LFs), restore 
the journal, and then restore the PFs.

The Taa Tool CHKSAVRST ERRORSONLY(*YES) will be very helpful in reading the 
job log, and printing out only messages relating to save/restore failures.


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