hello,
my config is : DELL GXpro 200, 1 SCSI 2.5 Go primary disc, 1 SCSI 8.4 Go
secondary disc, 1 SCSI CDROM, 64 Mo, NetBSD 1.4.1-i386.
I use Partition Magic to partition my discs.
I have six partitions: C:, D:, E:, F:, G: for Windows 95, and the rest for
NetBSD.
The first time I have installed NetBSD all is OK.
I boot from the floppy with the command line : boot sda1:netbsd.
After a few days, I want to boot my NetBSD by the command line : 
"boot sd1a:netbsd" and the response is :
"open sd1a : No such file or directory
 boot : sd1a : No such file or directory"
This the first problem.
The second problem is :
>> how to mount the D:, E:, F:, G:, (logical disque in msdos language), and
>> eventualy how to view the extend msdos partition?
>
>Have you tried the instructions at:
>http://www.netbsd.org/Ports/i386/faq.html#msdos_partition
>
>-- 
>Antti Kantee               Research Assistant                  B231
>pooka@cs.hut.fi        Helsinki Univ of Technology          PL 5400

--->--->
hello, this documentation is good for my first MSDOS partition on sd0.
fdisk sd0:
   NetBSD geometry cyl 3511 head 11 s/tr 108 (1188 s/c)
partition table
   0 sysid 6 (Primary 'big' DOS, 16-bit FAT (>32MB))
      start 63 size 4176837 (2039MB) flag 0x80
   1<UNUSED>
   2<UNUSED>
   3<UNUSED>

disklabel sd0
   8 partition
	size		offset	fstype
   d:	4194058	0	unused
   e:	41766837	63	MSDOS

If I mount -t msdos /dev/sd0e /mnt/msdos
At this point that's OK!!!

Now for the second disk (sd1) with my Extended partition, and my
logical disks (D: E: F: G:) on it.
fdisk sd1
   NetBSD geometry cyl 7637 head 8 sect/track 274 (2192 s/tr)
partiton table
   0 sysid 15 (Ext. partition LBA)
      start 16065 size 16755795 (8181MB) flag 0x0
   1 sysid 169 (NetBSD)
      start 14991088 size 1749216 (854MB) flag 0x0
   2<UNUSED>
   3<UNUSED>

disklabel sd1
   8 partition
	size		offset		fstype
   a:	306880		14991088	4.2BSD
   b:	528272		15297968	swap
   c:	1786127	14991088	unused
   d:	16777215	0		"
   e:	950975		15826240	4.2BSD
for the f: partition I have try
   f: 14991088-16065 16065  MSDOS
  mount -t msdos /dev/sd1f /msdos ==> invalid argument
   f: 14991088-274   274    MSDOS
  mount -t msdos /dev/sd1f /msdos ==> invalid argument
   f: 16755795	 16065	 MSDOS
  mount -t msdos /dev/sd1f /msdos ==> invalid argument

At this other point, that's no good !!!
what can I do know for seeing the logical discs?

Is Partition Magic responsive?