Floppy problems

5.3-REL-p5:
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I am having problems using a 360k floppy in a 1.2m drive; this should work.
fdcontrol reports different things with or without -Fv:
---
% fdcontrol -Fv /dev/fd0
/dev/fd0: 360 KB media type
        Format:         9,512,0xff,0x23,40,300,2,0x50,1,0,+mfm,+2step
        Sector size:    512
        Sectors/track:  9
        Heads/cylinder: 2
        Cylinders/disk: 40
        Transfer rate:  300 kbps
        Sector gap:     35
        Format gap:     80
        Interleave:     1
        Side offset:    0
        Flags           <MFM,2STEP>
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correctly identifying the media and need for 2step.  However, mounting the
disk from /dev/fd0 results in hard errors on all but the root directory,
indicating that 2step isn't being used.
This is true with or without device flag 0x10.

and
---
% fdcontrol /dev/fd0
1.2M
% fdcontrol -v /dev/fd0
/dev/fd0: 1.2M drive (5.25" high-density)
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which is wrong (it identifies the drive right but not the media; maybe
this is what is supposed to happen but...)

Explicitly giving the fmtstr to fdcontrol has no effect on either a current
or subsequent mount.  Nor does fdcontrol -f 360.

The fdc man page gives no hint as to what the minor number for each of 
the different format subdevices should be.

-- Pete