[comp.sys.ibm.ps2.hardware] How do I low-level format a PS/2 model 30 ?

Q4105@pucc.Princeton.EDU (W.g. Price q4105 Mathtech) (11/06/90)

I am supporting a plain PS/2 model 30 with a 20 meg hard drive that has
developed many bad sectors. (I don't know if this was sudden or gradual
but overlooked.)  I would like to try a low-level format before buying a
replacement, but can't figure out how.  The setup disk that came with it
does not seem to have the advanced diagnostics, even in response to ctrl-A.
Spinrite says that the drive is RLL encoded with sector translation, so it
won't reformat.  Norton's Calibrate and Ontrack's Disk Manager documentation
also say they won't work.  Is a reformat accessable in the BIOS via Debug
the way it is on the XT ?  is there anything appropriate available on SIMTEL ?
(Please e-mail any replies - my system flushes messages in less than a day.)