Back in my VSE days (DOS/VSE) we created a stand alone IPL tape weekly.

I managed to screw up an IPL volume and we needed the tape and the
procedure. At the time we hadn't a clue how to IPL from tape (yes!).

Fortunately, the systems programmer who set up the procedure was down the
road and he jumped in a taxi and rescued the day.

I don't think anything disk resident was needed to get us going to the
point where we could start things like CICS, which came from disk.




On Fri, Nov 20, 2020 at 3:10 AM Jeremy Nicoll <[email protected]>
wrote:

> On Thu, 19 Nov 2020, at 16:01, Dana Mitchell wrote:
> > They are definitely different.  And even within z/OS there will
> > sometimes be a PTF that changes an internal structure such that it has
> > an ACTION HOLD  telling you that you need to recreate the SADUMP program
>
> But the SADUMP program (at least, 20+ years ago) was a different matter.
> That
> was generally placed on specific disk volumes.
>
> The SADUMP tape was only used to get the system IPLed and make it load
> the disk-resident program.  Has this process changed?
>
>
> --
> Jeremy Nicoll - my opinions are my own.
>
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-- 
Wayne V. Bickerdike

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