NetBSD 10.0 partitioning issues and sysinst segfaults

Hi!

I want to upgrade my SS20 from 9.3 to 10.0.
Not so easy, the first attempt of upgrade failed, because I had separate 
/ and /usr    and /usr was too small (1.5 GB no packages, ?!?) so I 
thought, time to repartition the disk! Better one whole big partition 
plus swap.
I tried booting from cdrom but for some reason it "hangs forever" this way:


<#0> ok boot cdrom netbsd
Initializing Memory \
Boot device: /iommu/sbus/espdma@f,400000/esp@f,800000/sd@6,0:d  File and 
args: netbsd

<stays there> no CD activity.

what is going on? my drive is bad? is is not good?


Luckily in my upgrade attempts I dumped miniroot on swap partition, so I 
can try installing using that. Swap partition is on the second hard disk.

Create

use existing disklabel.
I start with:

       Start (MB)     End (MB)    Size (MB)  FS type Flag Filesystem
     ------------ ------------ ------------ -------- ---- ----------------
  a:            0         2527         2528      FFS I    /
  b:         2529         2656          128     swap
  c:            0         4156         4157 Whole disk
  d:         2657         4156         1500      FFS      /usr


and change it to this:
       Start (MB)     End (MB)    Size (MB)  FS type Flag Filesystem
     ------------ ------------ ------------ -------- ---- ----------------
  a:            0         3643         3644      FFS IN   /
  b:         3645         4156          512     swap
 >c:            0         4156         4157 Whole disk
     ------------ ------------ ------------ -------- ---- ----------------

looks fine?

I give partition ok... but then see this:


     116888C6714B1825E56406C96C06B1D3FinishedCommand ended on signal
     E56406C96C06B1D3Finisheddisklabel -w -r -f /tmp/disklabel.106 sd0 
'sd' 'fict
ious'
      Hit enter to continue


hit continue, get back to the beginning. From then on its just a big 
amount of segfaults.
Try to drop to shell and zero partition:

[1]   Segmentation fault      /sysinst
# dd if=/dev/zero of=/dev/rsd0c bs=8k count=1
[1]   Segmentation fault      dd if=/dev/zero of=/dev/rsd0c bs=8k count=1
# halt
[1]   Illegal instruction     halt


If instead I usereboot and choose use "set sizes" I get a segmentation fault

                     lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk
                     x What would you like to do?           x
                     x                                      x
                     x a: Use existing disklabel partitions x
                     x[1]   Segmentation fault      /sysinstx


this is becoming complicated.... and segfaults are always a bug.

Riccardo