Need Help with IIgs(01)+HS-SCSI+HD 20SC

[labelas@hotmail.com (Labelas Enoreth)]

Finally found a HD 20SC to use with my IIgs. (Just can't spare any slots
for focus or its kind). Problem is, it's not working. It works fine and
mounts on the SE (well, it did when I tested it after I got it...) though
it doesn't mount or show up on my Centris, that's probably because it's
actually the last possible scsi device I can add to the chain and it's
conflicting somewhere along the line...anyway...
The HS SCSI utilities see it, there aren't any bad blocks on it, however
the Partitioning utility gives me an error something like 'there is a
problem getting the drive size' and will not continue. This happened after
the first time I ran the utility (I set it for 1 partition of 21mb, was
that wrong since it suggested 2 of 10 and 11?), after I chose that, the
program gave an error and the drive disappeared. After turning both off,
and back on after a reasonable amount of time (and turning on the hd first
of course), the hd is now unpartitionable. It sees it but gives that
error. Aside from that, it does seem to be taking a long time to spin up
and announce itself on the scsi chain, but I assumed that was just because
it was such an old drive.

So, here's my questions:
Is there a better utility out there to just give it a good lowlevel format
and is possibly more robust than the HS SCSI utilities, but compatible
with the HS card?
Should I try to format it on the Mac using HDT or HDSC Setup for a ProDos
volume?
The drive is below my 5.25 drive and 2 3.5s...because of it's noisy
mechansims, the floppy drives actually vibrate faintly (it caused an
annoying noise as well until I put a paperback between the 5.25 and the
3.5s)...is this something that could cause unreliable disks?

oh, and thanks for any help...

Oh, one other question...I'm sure this has been asked/answered, but will
the HD20 (not SC) work via the IIgs SmartPort? I know that there are ways
to use it on the IIc, but I wondered...not that I will, it's probably
destined for the 128, but I was just curious. Oh, and I don't mean by
using it with a UDC or anything.