On Sun, Aug 03, 1997 at 01:20:16PM -0700, Bill Studenmund wrote:

> >  Get 2 PM entries of a NetBSD formatted disk
> 
> If the disk only had one partition on it, that should work.

It was IBM compatible preformatted, and I did't change that.

A MacOS formatted disk has 4 PM entries: Partition Map, Iomega Info,
MacOS Disk Driver and the HFS/NetBSD partition.

> 
> >  Copy them to sector #1 and #2 of the MSDOS disk
> 
> You need to keep the upper few bytes of sector #1 of the MS DOS disk
> as that's where the MBR partitions live...

IIRC Sectors #1 and #2 were filled with 0xEA.

> 
> >  Modify the block numbers of the PM
> >  Copy the beginning of sector #0 of the NetBSD disk ("ER" 0x02000003 )
> >  to sector #0 of the DOS disk.
> > 
> > Result: disklabel and mount_msdos did no longer complain about "missing
> > disklabel", but the mount told me, "wrong parameter".
> 
> What did disklabel say about the drive?

Here it is:

------------------------------------------------------------------------
# disklabel sd1

# /dev/rsd1c:
type: SCSI
disk: SCSI disk
label: fictitious
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 96
total sectors: 196608
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0		# milliseconds
track-to-track seek: 0	# milliseconds
drivedata: 0 

1 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:   196605        3      4.2BSD        0     0     0   # (Cyl.    0*- 95*)
disklabel: boot block size 0
disklabel: super block size 0
disklabel: warning, unused partition c: size 196608 offset 0

# mount -t msdos /dev/sd1a /user
mount_msdos: mount: Invalid argument
------------------------------------------------------------------------


What does this mean "Invalid argument"? Does it mean, that "/dev/sd1a"
is not the correct device?

A ZIP drive that I prepared for NetBSD (and which I can mount)
looks like this:

------------------------------------------------------------------------
# /dev/rsd1c:
type: SCSI
disk: SCSI disk
label: fictitious
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 96
total sectors: 196608
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0		# milliseconds
track-to-track seek: 0	# milliseconds
drivedata: 0 

2 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:   196187      421      4.2BSD        0     0     0   # (Cyl.    0*- 95*)
  b:       10       11     unknown                        # (Cyl.    0*- 0*)
disklabel: boot block size 0
disklabel: super block size 0
disklabel: warning, unused partition c: size 196608 offset 0
------------------------------------------------------------------------


cu

Franz