Randy:
We used to run MFT and everyday we changed the partition sizes
without an IPL.
Now if you are saying to change from MFT to MVT then indeed an IPL
was needed,
as well PCP to MFT (or for that matter MVT)?
The OS is the "key" issue and indeed VM you can "ipl" an OS and it
probably does not require an IPL(machine wise) a virtual machine
needs to be brought in .
Maybe I am missing some distinction here.
Ed
On Mar 5, 2012, at 9:06 AM, Gross, Randall [GCG-PFS] wrote:
In college, we had a 360/40 running PCP (Primary Control Program) in
64K; iirc, PCP could not be patrtitioned.
I worked one summer for a company that had a 256k 360/40 running MFT
with (typically) 4 partitions. Iirc, it took an IPL to reconfigure
MFT. (M = multimple, F = fixed)
I belive MVT (V = variable) was the first OS360 operating system that
suppored dynamic repartitioning, but I could be wrong. I never
experienced MVT - just went from MFT to SVS to MVS.....
Randy
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Lloyd Fuller
Sent: Friday, March 02, 2012 8:32 AM
To: [email protected]
Subject: Re: TINC?
It could be that the spooler was really a resident writer. I was
just a
newby programmer, and know that we were told that requiring more
than a
certain amount of memory required a major operations change and was
frowned on.
It was definitely not DOS/360. It was OS/360 and used JCL with DCBs,
etc, not the DOS/360 stuff.
Lloyd
----- Original Message ----
From: John Gilmore <[email protected]>
To: [email protected]
Sent: Thu, March 1, 2012 4:09:02 PM
Subject: Re: TINC?
Shmuel/Seymour wrote:
<begin extract>
NFW. There was only a single partition on PCP. Based on the model I'd
guess that you were running DOS/360.
</end extract>
and it is correct, albeit in a Pickwickian sense, that OS/PCP "had
only
a single partition"; but it did support both transient and resident
readers and writers; there were even some very primitive to-2311-DASD
RYO spoolers in use; and at this remove Lloyd Fuller's confusion
may be
only a terminological one. Still, I too guess that he may have been
using DOS.
--jg
On 3/1/12, Shmuel Metz (Seymour J.) <[email protected]>
wrote:
In <[email protected]>, on
02/29/2012
at 05:01 AM, Lloyd Fuller <[email protected]> said:
No. When we used PCP on the Model 40 with 64K. We had a single job
partition and, most of the time, a spool partition.
NFW. There was only a single partition on PCP. Based on the model I'd
guess that you were running DOS/360.
It was a very simple partition (like 10K or so) that ran the 1401
What are you trying to say? The 1401 was a computer, not a
program. If
you meant that you ran the 1401 Emulator program, that confirms that
it was DOS.
If we needed more memory for a specific purpose, we would reipl
from a
different pack and bring up OS360 with just the program partition.
Another sign that you were not running OS/360; on an OS/360 system
with multiple partitions you can amalgamated partitions with the
DEFINE command; you don't need to re-IPL.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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