usr/src/sys/hpdev/RDIDS

Describe command returns 37 bytes:

        bytes 6-8:      String (6 4-bit BCD digits)
        bytes 9-10:     Bytes per sector
        bytes 24-26:    Maximum cylinder number
        byte  27:       Maximum head number
        bytes 28-29:    Maximum sector number (in a track)
        bytes 32-35:    Maximum sector number (on disk)

Note we can't use a structure due to alignment problems.

NAME    CS80/ID STRING  CYLS    HDS     SECT    BPS     MBS

7914    20B     079140   575      7       64    256
7933A   212     079330   660     13       92    256
7945    220     079450   483      7       32    256
7957    22A     079570   506      5       63    256
7958    22B     079580   506      8       63    256
9134L   222     091340     0      1        1    256