Maybe I have a new one for you all! 
I would like to move LOADxx out of SYS1.PARMLIB and into SYSx.IPLPARM on the
IODF volume. Really no big deal, just do it, right? Well, no. I have 2
LPARS, Production and Sandbox. At this time, SYS1.PARMLIB lives on the
Sysres for each system, and is directly cataloged to each system's Master
Catalog. The HLQ for IODF is in a User catalog shared by both systems. In
the Sandbox LOADxx, I'm testing and using '==' and '========' for IODF
suffix and IODF HLQ to get the IODF specification. In Production LOADxx,
these values are hard-coded. Is it possible to create a new IODF on a new
volume, naming it <MyHLQ>.IODFxx.&SYSNAME, where MyHLQ is the HLQ found in
the hardware configuration token? <MyHLQ>.IODFxx is the current IODF name.
I'm confused at what HCD help is telling me:

"A production (or a work) IODF name can have a maximum
length of 35 characters.  The first level qualifier can be
the TSO prefix (user ID).  The second level qualifier must
be IODFxx, where xx are hexadecimal characters (0-9, A-F).
To specify more than two qualifiers is optional.  The
other level qualifiers can be alphanumeric or national (@,
#, $) characters or hyphen (-).  Example:

  'SYS1.IODF05.WORK'

If you want to IPL with a production IODF, the production
IODF naming convention must be 'yyyy.IODFxx', where yyyy
is the high level qualifier and xx are hexadecimal
characters."

Are more than two qualifiers optional, or must the naming convention be
'yyyy.IODFxx'? If I specified <MyHLQ>.IODFxx.&SYSNAME in LOADxx on the new
volume, would I load a 0B1 waitstate for not being able to find
<MyHLQ>.IODFxx? My hope is that the LLQ &SYSNAME is ignored, and the HLQ and
suffix are properly extracted from HSA. My intention is to not compromise
the integrity of Production by using the Sandbox system. Once I can get my
operation datasets off of Sysres, the benefits are obvious :-)

Thanks for any insight into my unusual(?) inquiry!

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