disklabel problems (pmax)

[Thomas Graichen <graichen_(_at_)_rzpd_(_dot_)_de>]

i need some help from someone with some more disklabel/kernel
knowlegde - then i access the disklabel on a pmax (either by doing an
disklabel -r or mounting a partition from there and unmounting it) the
in memory copy of the disklabel get's trashed - i see this on
different disks now - and it does'nt happen if i use NetBSD/pmax - it
can't be something with the pmax code - because it is nearly identical
to NetBSD - so it can only be some change which was done on the
OpenBSD disklabel/disk/kernel subsystem which was missed on the pmax -
i looked through all the logs in arch/pmax - but did'nt find anything
which might cause this problem - can someone please look at this
because after one day of experimenting i don't know how to go on - if
you wan't to know more about it - i'll try to give you all information
i can give you

ok - here is an example which illustates the trashing very well
(btw. - sources are 961228 - but the problem exists since i started
with OpenBSD/pmax i think)

a lot of thanks in advance

t

p.s.: it does'nt seem to happen on all (but on some) disks and keep in
      mind that the pmax still uses the old scsi stuff from 4.4bsd

root_(_at_)_summer:~> disklabel rz3
# /dev/rrz3c:
type: SCSI
disk: rz56
label: 
flags:
bytes/sector: 512
sectors/track: 54
tracks/cylinder: 15
sectors/cylinder: 810
cylinders: 1632
total sectors: 1299174
rpm: 5400
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

4 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:    65536        0    4.2BSD     1024  8192    16   
  b:    98304    65536      swap                        
  c:  1299174        0    unused     1024  8192         
  d:  1135334   163840    4.2BSD     1024  8192    16   
root_(_at_)_summer:~> disklabel -r rz3
# /dev/rrz3c:
type: SCSI
disk: rz56
label: 
flags:
bytes/sector: 512
sectors/track: 54
tracks/cylinder: 15
sectors/cylinder: 810
cylinders: 1632
total sectors: 1299174
rpm: 5400
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

4 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:    65536        0    4.2BSD     1024  8192    16   
  b:    98304    65536      swap                        
  c:  1299174        0    unused     1024  8192         
  d:  1135334   163840    4.2BSD     1024  8192    16   
root_(_at_)_summer:~> disklabel rz3
# /dev/rrz3c:
type: SCSI
disk: rz56
label: 
flags:
bytes/sector: 512
sectors/track: 54
tracks/cylinder: 15
sectors/cylinder: 810
cylinders: 1632
total sectors: 1299174
rpm: 5400
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

4 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:    65536        0        28                        
  b: 852141077    65536      swap                       
  c:  1299174        0    unused     1024  8192         
  d:  1135334   163840    4.2BSD     1024  8192    16   
disklabel: partition b: partition extends past end of unit

-- 
  thomas graichen - graichen_(_at_)_rzpd_(_dot_)_de graichen_(_at_)_OpenBSD_(_dot_)_org graichen_(_at_)_FreeBSD_(_dot_)_org

  perfection is reached, not when there is no longer anything to add, but when
      there is no longer anything to take away    antoine de saint-exupery