> Now, I have not found the "dimensions" on an RD53 - don't
> know number of cylinders...help please.

Here is the section of /etc/disktab from the NetBSD-distribution telling 
you the parameters you need:

rd53|RD53|DEC RD53 on Microvax:\
	:ty=winchester:ns#18:nt#8:nc#963:\
	:dt=MSCP:\
	:pa#15884:oa#0:ba#8192:fa#1024:\
	:pb#33440:ob#15884:bb#4096:fb#512:tb=swap:\
	:pc#138672:oc#0:bc#4096:fc#512:\
	:pe#33440:oe#0:be#4096:fe#512:\
	:pf#105232:of#33440:bf#4096:ff#512:\
	:pg#89348:og#49324:bg#4096:fg#512:\
	:ph#122788:oh#15884:bh#4096:fh#512:\
	:b0=rdboot:

ns = sectors per track   =  18
nt = tracks per cylinder =   8 (==> sectors/cylinder = 144)
nc = number of cylinders = 963

I hope this is what you need.  Good luck.

  Holger


          *** newly excited user of NetBSD on a uVAXII ***
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       | HOLGER AUSTINAT              phone: (314) 935-1200 |
       |                         e-mail: hba1@cec.wustl.edu |
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