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I also question whether that was "sleep" mode or was just as operationally
disruptive as yanking the power cord. I am curious as to what QIPLSTS was
upon waking up from such an outage. I think I would tend to stick to
PWRDWNSYS *CNTRLD DELAY(120)
After shutting down the rest of your options, doing the ENDTCP and the
ENDSBS.
Now on 7.2 and above there's a few more things I would do also.

Now, back to the question...
Back in the day there was this thing called "stiction". This was where a
system would not power up without a disk error. One would have to remove
the disk drives, give them a few light taps, stick them back in and try
them again. Not really sure how long of a power outage is necessary
before the grease congeals or whatever it was that caused this.

If you have the machine under maintenance and can do without it for a day
or so waiting for IBM to fly in the parts for that old machine from the
opposite side of the country then that's not really a problem. Hey
occasional full shutdowns followed by an IPL are going to be when hardware
is given more of the full diagnostics.



Rob Berendt

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