Thanks for the explanation 



> On Mar 13, 2019, at 3:16 PM, Jim Mulder <d10j...@us.ibm.com> wrote:
> 
>  INADDR was added to STORAGE OBTAIN in SP4.3.0 to support
> FORKing in POSIX. POSIX did VSMLIST in the source space to 
> find out how storage is allocated, and then STORAGE OBTAINs 
> with INADDR in the target space to create the same storage
> allocations in the target.   At the time of the original 
> POSIX (OMVS) project, that was being done by separate 
> development team with a separate FMID, using what they could 
> of existing MVS services and doing the minimum of changes in 
> MVS itself. 
> 
>  By the time 64-bit virtual storage came along, 
> Unix System Services was integrated into the MVS BCP,
> and internal interface was created for  Unix System Services
> to ask RSM  to do the FORKing of memory objects.  So we have 
> had no need for an INADDR-like function for 64-bit storage. 
> 
> Jim Mulder z/OS Diagnosis, Design, Development, Test  IBM Corp. 
> Poughkeepsie NY
> 
>> From: "Joseph Reichman" <reichman...@gmail.com>
>> To: IBM-MAIN@LISTSERV.UA.EDU
>> Date: 03/13/2019 03:00 PM
>> Subject: Re: IARST64 in addrr
>> Sent by: "IBM Mainframe Discussion List" <IBM-MAIN@LISTSERV.UA.EDU>
>> 
>> Wonder why this functionality is not available above the bar
>> 
> 
> 
> 
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