On Wed, 24 Sep 2008 12:53:59 -0700, Kurt Eastwood <[EMAIL PROTECTED]> wrote:

>Hello,
> 
>I would like to pass a situation by everyone to get their opinon of an
issue I am having. I have opened an issue with IBM but many heads are better
than 1.
> 
>We are getting some new dasd and after the dasd is installed I am to run an
ICKDSF REFORMAT with the REFVTOC parm against all the dasd, per the dasd
manufacturer.
> 
>I tested this on a test machine against a few volumes and found that my
MVSCAT volume is mounted as STORAGE and the ICKDSF does not like this, it
wants it mounted PRIVATE. This is the only volume mounted as STORAGE. My
VATLST00 is as follows:
> 
>VATDEF IPLUSE(PRIVATE),SYSUSE(PRIVATE)
>MVSCAT,1,0,3390    ,Y                 
>DLIB02,1,2,3390    ,Y                 
>DLIB03,1,2,3390    ,Y                 
>MVSDLB,1,2,3390    ,Y                 
>MVSRES,1,2,3390    ,Y                 
>TARG02,1,2,3390    ,Y                 
>TARG03,1,2,3390    ,Y                 
>
>I took over this system from someone else and do not know why this was set
up to be mounted STORAGE. 
> 
>It looks like I could shut down the system, ipl a stand alone ICKDSF and
run the REFORMAT but that seems like a last resort to me.
> 
>The system master catalog does reside on MVSCAT as do other data sets.
> 
>Is there a reason to have this mounted as STORAGE?
> 
>Are there system datasets that are required to be on a volume mounted STORAGE?
> 
>Can I change this MVSCAT to be mounted as PRIVATE and re-ipl without
causing issues since it has been this way for a while?
> 
>Is there a requirement to have at least one volume mounted as STORAGE in
VATLST00?
> 
>Thanks to everyone in advance for your help.
>Kurt
> 
> 



At least one volume needs to be mounted public or storage for temporary
data sets in order to logon to TSO.  If SMS is controlling temporary 
data sets, then this is not a requirement.  So it probably has its place
in history and is not needed.

You can change it with a mount command - no need to IPL.

M /cuua,VOL=(SL,MVSCAT),USE=PRIVATE   

Don't forget to change the VATLST assuming this doesn't cause
a problem.

--
Mark Zelden
Sr. Software and Systems Architect - z/OS Team Lead
Zurich North America / Farmers Insurance Group - ZFUS G-ITO
mailto:[EMAIL PROTECTED]
z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/
Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html

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