I seem to remember a thread from long ago that discussed
"unchangeable defaults". :-)


---- Original message ----
>Date:   Thu, 17 Sep 2009 17:18:30 -0400
>From:   Alan Altmark <alan_altm...@us.ibm.com>  
>Subject:   Re: TDISK and SYSTEM CONFIG question.  
>To:   IBMVM@LISTSERV.UARK.EDU
>
>On Thursday, 09/17/2009 at 04:00 EDT, "Gentry, Stephen" 
><stephen.gen...@lafayettelife.com> wrote:
>> As mentioned in my question below, we have to format the
defined temp
>> minidisk every time. So, from that point of view, the data
is gone.  I
>> didn't think of the DDR situation. However, a class G user
would have to
>> know where the T-DISK area is defined.  They cannot issue a
QUERY ALLOC
>> TDISK or QUERY TDISK command.  T-DISK's can be placed
anywhere, so
>> security by obscurity.  I know that last comment won't fly with
>> auditors, which is what this whole curiosity going anyway.
 The auditor
>> is primary concerned with class G users.
>
>The auditor's concerns are valid; if you do not enable
CLEAR_TDISK, then a 
>class G user can see residual data on a t-disk.  Even if the
user can't 
>run DDR or ACCESS the disk, its contents are visible.
>
>If I get my way, ENABLE CLEAR_TDISK will become the default
and you won't 
>be able to change it.  :-)
>
>Alan Altmark
>z/VM Development
>IBM Endicott

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