here is my disklabel that the install floppy made for my sd0:
---cut---
disk: alphaboot
label:
flags:
bytes/sector: 512
sectors/track: 84
tracks/cylinder: 16
sectors/cylinder: 1344
cylinders: 3045
total sectors: 4110480
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0

8 partitions:
#        size   offset     fstype   [fsize bsize   cpg]
   a:   263424        0     4.2BSD     1024  8192    16   # (Cyl.    0 - 195)
   b:   537600   263424       swap                        # (Cyl.  196 - 595)
   c:  4110480        0     unused        0     0         # (Cyl.    0 - 3058*)
   d:  3309456   801024     4.2BSD     1024  8192    16   # (Cyl.  596 - 3058*)
---cut---

first, where did they get the total value of cylinders as (0-3058) when it 
says above that it's 3045. size and offset for (d:) looks wrong. why is 
there a (*) after 3058? is it because it couldn't guess the real max cylinder?