Re: How to replace load source disk unit 1 on a 2800 with 2801

Kirk:

I actually tried this before my plea.  I have
replaced/removed/deleted/added units without problems before.  But
doesn't work for the load source disk 1.   It wants me to suspend the
drive(which is ok) and use identical drive to do the replace which
defeats the purpose.  The advanced backup and recovery guide is not very
clear whether you can replace a 2800 unit with a 2801 unit.   DST
wouldn't let me do it.   When you did this, was that a 2800 to 2801
swap?  This raises an interesting question, can two mirrored pairs have
unequal capacities  with the larger one using only enough to match the
smaller drive? AS400 is truly an amazing machine in the way it carefully
handles these problems.   Try that with the FDISK. ;-)

> The disk utilities under DST(READ CE FUNCTION) can do this. You can
> PUMP a
> smaller drive to a bigger one. By that I mean, There is a CE tool to
> save "A"
> drive and restore "A" drive. It was first used in the days of the
> Sys/38 but is
> still there for people without mirroring or raid.
>
> It's been a while since I did this but it can be done. I don't
> remember for sure
> but I think you may have to stop mirroring to do it. If these are the
> only 2
> drives mirrored no big deal.
> Basic steps if you are going to do this:
> #1 F U L L  B A C K U P       F U L L  B A C K U P      F U L L  B A C
> K U P
>
> #2 IPL to DST
> #3 Using the disk recovery menus stop mirroring
> #4 Shutdown and pull the non-cfg'd 2800 book
> #5 Install first 2801
> #6 IPL to DST
> #7 PUMP LS 2800 to 2801(both drives one at a time)
> #8 Shutdown and remove last 2800 and move first 2801 to last 2800's
> place
> #9 Install 2nd 2801 where you had 1st 2801.
> #10 IPL to DST and Start Mirroring
> #11 Complete the rest of the IPL and throw away 2800s...
>
> **********************
> DISCLAIMER: This is meant as a guide and only as a guide. This is best
> done by
> your CE
> **********************
>
> Dave Mahadevan wrote:
> >
> > Folks:
> >
> > This has got me stumped.  I would like to replace both my 2800
> internal
> > disk books with 2801 internal disk books on my mirrored system asp.
> > (Because) two mirrored 2800 books provide 640MB while two mirrored
> 2801
> > books will provide 1900MB.  This will make sure enough dump space is
> > available.   The advanced backup and recovery guide says you cannot
> > remove unit 1 since LIC resides there.  Short of restoring or
> scratch
> > install, is there any other way to do this.  Unfortunately the
> system
> > unit does not have more than two slots for the 2800 types and each
> book
> > is mirrored on the other.
> >
> >

--
Thank You.

Regards

Dave Mahadevan.. mailto:mahadevan@fuse.net


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