IEHDASDR was part of OS/360, OS/VS1 and OS/vs2, and continued to exist in MVS 
for lo these many releases. However, Direct Access Storage Dump Restore 
(DASDR), 5740-UT1, is a separate program, with a separate dump format, and was 
never part of any of them; you had to order and install it separately. Oh, the 
DASDR dump format was also not compatible with DF/DSS, 5740-UT3.

As I recall, IEHDASDR did not support 3350, much less 3375, 3380 or 3390.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

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From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of 
David Spiegel [00000468385049d1-dmarc-requ...@listserv.ua.edu]
Sent: Friday, December 9, 2022 1:53 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Computers

IEHDASDR  was part of MVT (early '70s)
DF/DSS came much later (maybe 10 years?)

On 2022-12-09 13:12, Seymour J Metz wrote:
> I believe that DASDR and DF/DSS came later.
>
>
> --
> Shmuel (Seymour J.) Metz
> https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmason.gmu.edu%2F~smetz3&data=05%7C01%7Csmetz3%40gmu.edu%7C17f86b4525594526ceb308dada184c87%7C9e857255df574c47a0c00546460380cb%7C0%7C0%7C638062095144195930%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=AXwPlpH%2Fh7sp6wPf3qIpvJFAeipmfkiieDHS8ai8rKw%3D&reserved=0
>
> ________________________________________
> From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of 
> Steve Beaver [st...@stevebeaver.com]
> Sent: Tuesday, December 6, 2022 7:29 AM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: Computers
>
> DSS.  Data Set Services
>
> Sent from my iPhone
>
> No one said I could type with one thumb
>
>> On Dec 6, 2022, at 06:21, Jay Maynard <jaymayn...@gmail.com> wrote:
>>
>> OK, this is a new one on me. What's DSS?
>>
>>> On Tue, Dec 6, 2022 at 6:09 AM Seymour J Metz <sme...@gmu.edu> wrote:
>>>
>>> MVS/SE installed on an OS/VS2 base; for R1 it was 3.7 with prerequisite
>>> selectable units and for R2 it was 3.8 with prerequisite selectable units.
>>> In each case a prerequisite SU killed DSS. MVS/SP replaced MVS/SE
>>>
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