Ed--Thanks for opening up this subject train, because we will probably be
going to a z/890 next January. I'm on z/VM 4.4 which I (think I) know is
31 bit/64 bit capable. I also "think" that the z series is 64 bit
architecture only that, as I understand, will tolerate 31 bit code, but at
the very basic level when CP ipl's, it is in a 64 bit box, so to come up on
the z/890, I'll have to be ipling the 64 bit nuc that gets built. Right
now, I just throw away the CPLOAD64 MODULE that gets built when I build a
new nuc. Then I copy CPLOAD32 to my parm disks as CPLOAD. I guess I'll
need to start keeping the bigger CPLOAD MODULE. If I am correct, the nuc
will come up in 64 bit mode but it will appear to my 31 bit code that
nothing has changed--right? I hope that there are no gotcha's in the 64
bit code path because I won't have any way to test it until the new (old)
box rolls in the door. My co-worker was just in my office and insists that
the z-hardware initially ipls in 31 bit mode. If that is really the case,
I shouldn't even have to change from the CPLOAD32 MODULE I'm running.
For the dasd upgrade, you may be lucky enough to do what I saw done about 5
years ago. The system I supported was on some kind of IBM dasd, either
RAMAC or early SHARK, and we were changing to either EMC or Hitachi (the
memory is the 2nd thing to go and I don't remember the 1st). Whatever we
were changing to had microcode in the control unit that, under the covers,
and completely from control unit to control unit, migrated the dasd from
the old to the new. It was sort of like doing a flash copy where the
target is kept in sync with the original.
Jim
At 11:20 AM 3/28/2006, you wrote:
Hello Everyone,
The Serve support appendix show that z/VM 4.4 will run on the
MP3000
/z800/z900 in basic mode and the z890/z990 in LPAR mode.
We are on z/VM 4.3 and was wondering if anyone has run z/VM 4.3
on
any of these boxes (unsupported of course).
Ed Martin
Aultman Health Foundation
330-588-4723
[EMAIL PROTECTED]
ext. 40441
Jim Bohnsack
Cornell Univ.
(607) 255-1760
