How does FreeBSD access NetBSD, OpenBSD?

Jerry McAllister jerrymc at
Fri Jan 28 08:19:24 PST 2005

> I have FreeBSD, OpenBSD, and NetBSD on the same hard drive of my system.
> How can I mount the NetBSD or OpenBSD partitions from FreeBSD?
> Slice 1 - Ext3fs for data between linux/bsd
> Slice 2 - OpenBSD slice with 4 ufs partitions and swap (a,b,e,f,g)
> Slice 3 - FreeBSD slice with 4 ufs partitions and swap (a,b,d,e,f)
> Slice 4 - Extended slice composed of:
>    Slice 5 - NetBSD slice with 4 ufs partitions and swap (a,b,e,f,g)
>    Slice 6 - Unformatted as of yet.

Hmmm,  First thing I see is that only 4 slices are allowed on a drive.

> FreeBSD is, of course running fine, but I can't see any of the other
> slices/partitions on the drive including the ext3fs partition.
> $ ls /dev/ad1*
> /dev/ad1        /dev/ad1s3      /dev/ad1s3c     /dev/ad1s3f
> /dev/ad1s6
> /dev/ad1s1      /dev/ad1s3a     /dev/ad1s3d     /dev/ad1s4
> /dev/ad1s2      /dev/ad1s3b     /dev/ad1s3e     /dev/ad1s5
> I can seem to access all the linux partitions on my first drive ad0,
> but that drive is only linux so there are no complex partitions in
> slices like on ad1.  I would expect that the nature of geom, I should
> be able to access all the partitions fine, but I might be missing
> something.

Next question may be too obvious, but did you mount the other
slices or put them in /etc/fstab?

But, I bet it is the 4 slice limit per device that is the issue.


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