As stated in the manual:
Do not place a data set that is intended to contain a
stand-alone dump on a volume that also contains a page
data set that the stand-alone dump program you might
need to dump. When stand-alone dump initializes a page
volume for virtual dump processing, it checks to see
if the output dump data set also exists on this volume.
If it does, the stand-alone dump program issues
message AMD100I and does not retrieve any data from
page data sets on this volume. Thus, the dump might
not contain all of the data that you requested.
This lack of data can impair subsequent diagnosis.
The dump data set cannot be defined on the same
volume that contains the IPL text of stand-alone dump.
The maximum size of a single-volume DASD dump data
set depends on the type of data set.
Conventional sequential (DSNTYPE=BASIC) data
sets can span 65,535 tracks per volume, and can
hold approximately 3 GB per volume.
Extended format (DSNTYPE=EXTREQ) data sets are
supported by z/OS® V1R6 and later releases. Extended
format sequential data can hold 4,294,967,295 blocks
per volume. The maximum size for extended format
sequential is approximately 98,304 GB per volume.
You cannot use striping or compression options for
extended format sequential data sets. You must use
the guaranteed free space option to require DFSMS
to reserve space at the time that the data set
is created.
Large format data sets are supported by
z/OS V1R7 and later releases. Large format
(DSNTYPE=LARGE) data sets can span 16,777,215
tracks per volume. The maximum size for large
format data sets is 768 GB per volume.
Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp.
Poughkeepsie NY
"IBM Mainframe Discussion List" <[email protected]> wrote on
04/01/2021 10:12:52 AM:
> From: "Richards, Robert B. (CTR)" <000001c91f408b9e-dmarc-
> [email protected]>
> To: [email protected]
> Date: 04/01/2021 12:05 PM
> Subject: Stand Alone Dump questions
> Sent by: "IBM Mainframe Discussion List" <[email protected]>
>
> It has been a long time since I messed around with modifying this
> stuff and, yes, I should RTFM, but I'm asking here so others can
> benefit from the questions (that's my story and I'm sticking with it!@
<grin>)
>
> Is there any reason *not* to use Mod-27 or -54s volumes?
>
> Is there any reason against placing the SADMP text on the first of
> the SA dump volumes?
>
> Are there any size restrictions on the datasets?
>
> Thanks for any and all answers,
>
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