> On Sat, Apr 18, 2020 at 10:40:53AM +0200, William Pomian wrote:
> > Hello, I'm new user and I have a little pbm to mount an existing
> > ext2 partition

I've had the same question for a long time (and am not a new user :-)

I cannot find the correct formula for what to put into the disklabel.
Here's what SuSE fdisk says about IDE drive 1:

Disk /dev/hdb: 255 heads, 63 sectors, 2489 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdb1             1      1024   8225248+   c  Win95 FAT32 (LBA)
/dev/hdb2          1025      1793   6176991+  a9  Unknown
/dev/hdb3          1794      2489   5590620    5  Extended
/dev/hdb5          1794      1796     24066   83  Linux
/dev/hdb6          1797      1813    136521   82  Linux swap
/dev/hdb7          1814      2489   5429938+  83  Linux

  NetBSD has a partition on the disk which can be seen (but not written)
from SuSE. Both SuSE and NetBSD can write to the DOS partition. As I
understand it, the 1st Linux partition is "boot" which doesn't have user
fies that I care about, nor does swap. I think I need to mount the last
partition "/dev/hdb7".

  I've tried to add it to the NetBSD disk label, as /dev/wd1h, like
this:

...
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 40000464
...
#        size   offset     fstype   [fsize bsize   cpg]
  c: 12353983 16450561     unused        0     0         # (Cyl. 16320*- 28575*)
  d: 40000464        0     unused        0     0         # (Cyl.    0 - 39682)
  e: 16450497       63      MSDOS                        # (Cyl.    0*- 16319)
  f: 12353983 16450561     4.2BSD     1024  8192    16   # (Cyl. 16320*- 28575*)
  g: 11181240 28804545     unused        0     0         # (Cyl. 28575*- 39668*)
  h: 10744272 29256192 Linux Ext2        0     0         # (Cyl. 29024 - 39682)

  But, when trying to use it, I get this:

netman2# mount -rt ext2fs /dev/wd1h /mnt
mount_ext2fs: /dev/wd1h on /mnt: Input/output error

  Someone can correct my math?

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