🚀 go-pugleaf

Attempting to install the above Quantum disk (4.3G) on a Sparcstation 2 running
Sunos 4.1.3.

I obtained #cylinders (3850),  #heads (20),  #sectors (109), and rpm (7200) from Quantum spec sheet.
Using format, I cannot specify the correct rpm (7200), so I leave it at the default (3600).
All other parameters enter normally, and format appears to function correctly.

I create one partition (c) using the entire disk (3850/0/0).

When running newfs, it fails after writing a long list of alternate superblocks.  Specifically,
after writing backup superblock 4188320, it reports: "seek error 422344, wtfs: Error 0".

I have two questions:

1) Please help (okay, more of a request than a statement).  What  mistake am I making, and does
an incorrect rpm setting prove a barrier to using this disk?

2) Will the lack of proper rpm setting affect efficiency? I would think it would.  Why can I not set
the correct rpm setting?

Thank you in advance for any help.

--Rich