> > # mount -t msdos /dev/sd0e /mnt/usb/
> > mount_msdos: /dev/sd0e on /mnt/usb: Device not configured
>
> What does disklabel say, then?
disklabel sd0
# /dev/rsd0d:
type: SCSI
disk: mydisk
label: fictitious
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 286188
total sectors: 586114704
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

5 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 d: 586114704         0      MSDOS                     # (Cyl.      0 - 
286188*)

It may not be the exact original disklabel, as I have been fighting
with the drive for a couple of hours.