On Mon, 6 Mar 2000, netbsd alpha wrote:

: total sectors: 17783112

* 512 = 9104953344 bytes.

:        UNFORMATTED CAPACITY (MB) ________________11700
:        FORMATTED CAPACITY (MB) __________________9100

(These are based on MB=1000000 bytes, not MB=1048576 bytes.  Bugs me every
time.)

:        AVERAGE SECTORS PER TRACK ________________168 rounded down
:        ACTUATOR TYPE ____________________________ROTARY VOICE COIL
:        TRACKS ___________________________________105,480
:        CYLINDERS ________________________________5,274 user
:        HEADS ______PHYSICAL______________________20

Hm, according to my math, 5274*168*20 = 17720640; 5274*169*20 =
17826120.  The reported capacity by NetBSD, 17783112, is in that range (and
is what is reported by the disk's INQUIRE command).

NetBSD's reported broken-down geometry is 5268*168*20 = 17700480 sectors,
which is also coming from parameters in the INQUIRE command.  However, your
disklabel actually uses space beyond that:

:   h:     1024 17782088         18

All but one of my IDE drives report c*h*s numbers less than the actual
capacity (which is correct), and two of my SCSI drives as well.  I just run
by the raw capacity numbers and ignore c*h*s where possible.

-- 
-- Todd Vierling (tv@pobox.com)