Besides unwanted terminal interrupts, the S/A programs didn't used to be
too awfully discriminating as to what type of device they saw an
interrupt on. I remember, once "a long time ago and far far away",
having a hard time getting a S/A program, probably DDR, ipled until I
disabled the interface to a 3088 channel to channel box. The S/A
program saw the interrupt from the 3088 and latched on to that address,
trying to respond to it. I don't have any idea if the S/A programs have
gotten any more discriminating or if the 3088 was the only other device,
besides a 327x type of terminal, that could generate an interrupt that
looked the same.
Jim
David Boyes wrote:
We are looking into updating our procedures should a failure requiring
barefoot executions of ICFDSF and DDR occur.
Do you recommend having a single IPL tape with both versions on it?
Do you recommend an IPL tape for each product?
Either will work, but I make separate tapes and put them in different
drives during recovery. If you're using the SA tools, things are badly
broken, and the SA versions of these utilities are pretty sensitive to
things like Enter at the wrong time, at which point you get to re-IPL.
It's a lot easier to rewind a tape with one utility on it, and you can
IPL the one you want w/o having to go through the other one to get
there.=20
Also, remember that the SA versions of these tools wake up at the first
terminal interrupt following IPL and use that as the console. While this
is not as big of a deal as it used to be when there were lots of locally
attached terminals, you do run a small risk of some random anxious user
getting control of the system if they hit Enter at exactly the right
time. The separate tape minimizes (but does not eliminate) that
possibility.=20
Do you recommend running them from an area within the ZVM PARM
disk(s)?
Well, if things are so far gone that you need the SA tools, then the
parm disks are probably toast too, so while it's useful to have them
there, it doesn't really buy you much, IMHO. You're better off having a
1 pack system that you can restore to a spare volume, then use that to
run the non-SA DDR in parallel to restore the rest of the system. It's a
lot faster.=20
Come to my talk at WAVV about this..8-)
--
Jim Bohnsack
Cornell University
(607) 255-1760
[EMAIL PROTECTED]
