Bill,

I already swapped cables and devices several times, but sometimes made
so many changes that I forgot what was changed and what wasn't (too
many variables). I did, however re-check all jumper settings...even
deliberately setting them wrong just to confirm the labeling was
correct (I had a Toshiba CD ROM years ago whose jumper diagrams were
backwards)

This time, I disconnected the suspect disk from its location as disk #2
of 3, and attempted Win98 setup...and rec'd no error message. Then
reconnected it as disk #1, and the message re-appeared.

So it caused the same error in two different locations and connected to
two different cables (at least!). Also was able to duplicate at least
twice successively.

Something I forgot to mention before, is that in both Dos and Windows,
Partition Magic 6 reports "check failed" for most or all partitions
when the Maxtor 120GB Disk is connected. Yet Partition Magic7 and Drive
Image 2002 report no such errors, nor does Partition Magic 6 when the
disk is not connected. To me, that would indicate some kind of problem
Windows 98 has with the parameters of the 120GB vs bad hardware item,
but still only speculation.

Like I said, though, and you mentioned also....I do need to rest from
this, and knowing I CAN re-install Win98 by disconnecting that Hard
Drive is good enough for now.

Just the same, if you or anyone else knows of or learn of a
relationship between the SU0013 error and Disk size (I know Win98 HAS a
barrier of 137GB, but not 120GB that I know of)....or if there is a
diagnostic software application besides Powermax that you know of that
is available for evaluating/fixing hard drive status, please advise me.
Thanks,
Larry