Re: SETDSKCLN

At 02:34 PM 6/4/97 -0400, Dave wrote:
>Folks:
>
>What does this command SETDSKCLN do?  It has option *CHECK, *YES, *NO.
>There is no help and no mention of it in the Softcopy.  IBM has a
>defective ptf MF14775 on it for V3R2!
>
>>From IBM's SF98078
>
>97/03/21 DEFECTIVE PTF: MF14775
>                LICENSED PROGRAM = 5763999
>                APAR NUMBER: MA15635
> 
>                USERS AFFECTED: All users running the Set Disk Clean
>                                (SETDSKCLN) command with parameter
>                                (*YES) selected and with more than
>                                85 disk units configured to the system.
>                REASON DEFECTIVE: During an Initial Program Load
>                                  (IPL), the system will terminate
>                                  with System Reference Code (SRC)
>                                  B600 0506 on the system control panel.
>                RECOMMENDATION: Set the Set Disk Clean (SETDSKCLN)
>                                command to *NO and apply the fixing LIC
>                                PTF MF15030.
>                                MF15030 is included in cumulative PTF
>                                package C7126320.
> 
>-- 


Not sure what it does; but there's a similar PTF on V3R-1- that we encountered.

The command in question must be run on a V3R1 system before you upgrade to
V3R2.  The command checks for and corrects some internal problem (I believe
that it can cause you to reload if you encounter it!).

The bug is that whoever wrote the code needed a table of something for each
disk unit, so they allocated 3 bytes per unit.  3 x 85 = 255, one of those
"Magic Numbers."  And, of course, we found the bug.  Somehow, IBM didn't
have a PTF available ("We're working on it right now; someone else just had
the very same problem.")  We can't believe we're the only site migrating
from 3.1.0 to 3.2.0 that has more than 85 disk units! !

There -is- another bug still extant:  The parameters are *CHECK, *YES, *NO.
*YES sets the internal check to run at the next IPL (which will be a 'long
running' IPL).  *NO turns it off.  *CHECK is supposed to show the status of
the program; however, even if it says *NO, use the *NO option anyhow.
*CHECK does not always show the correct status.


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

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