I have to agree Ted that it doesn't make a whole lot of sense, but that is 
nonetheless the way it works.

I extracted the following from chapter 2 (title: Selecting the SMF Data Set 
Control Interval) of the MVS SMF Guide:

The CI size of the first SMF data set that the system opens during an IPL will 
be the CI size for all SMF data sets for that IPL. If SMF encounters a data set 
with a different CI size, then the data set is not used, and the system 
displays a message on the console informing the operator of the problem. A data 
set that has any error does not go on the list of active data sets. If all data 
sets fail to be successfully opened and allocated, then 4K (4096 bytes) is 
chosen as the default CI size for the IPL, and SMF buffers the data.

If you define a new group of SMF data sets with a different CI size, you must 
re-IPL to use these data sets. When you define an SMF data set, the logical 
record size must be 10 less than the CI size. 

Cheers,
Alan

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of 
Ted MacNEIL
Sent: Tuesday, November 16, 2010 15:17
To: IBM-MAIN@bama.ua.edu
Subject: Re: ReSizing the SMF Man Files

>You cannot stop and start SMF, the ONLY way to change CISIZE for the MAN files 
>is to IPL, period.

That really doesn't make sense to me, but I'll take your word for it.
Do you happen to know where it's documented?
I couldn't find any reference.

-
Ted MacNEIL
eamacn...@yahoo.ca

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