Re: V3R1 to V3R2 Upgrade

[PaulMmn@xxxxxxxxxxxxx (PaulMmn)]

At 1:27 PM 7/1/97, Danny McQuestion wrote:
>Pete Massiello wrote:
>> You forgot some very important steps.  You must make sure that the LIC
>> extension PTFs are applied to V3R1 prior to the upgrade, and you also
>> need to install and then run SETDSKCLN.
>
>        This is a requirement prior to installing the latest v3r2 CUM Package
>(7126).  See Appendix C of the doucmentation that comes with the tape.
>It also refers you to the cover letters of two other PTF's because the
>system will choke on an IPL.
>
>        How often should SETDSKCLN be run?



As I understand it, SETDSKCLN is a once-and-done per machine; you have to
have the PTF that prevents the problem that SETDSKCLN detects applied at
the same time.

BEWARE:  There is a bug in SETDSKCLN that requires a PTF (available now) to
fix:  If you have more than 85 disk arms, SETDSKCLN will hang your system!
A second IPL (manual) will work correctly; SETDSKCLN apparently runs as a
PTF... (and PTFs are not tried when manually IPLing).  The PTF fixes the
problem so SETDSKCLN will run properly.

85 disk arms, you say.  Why 85?  Well, because 85 x 3 = 255, of course!
Some programmer 'assumed' that no one would have more than 85 disk arms.

MY question is, 'How come we discovered this problem first?'  We're late
trying to go the v3r2, and we -can't- be the only site with more than 85
disk arms (although IBM -did- say that someone else had the very same
problem just days before we reported it...)!


--Paul E Musselman
PaulMmn@ix.netcom.com


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