Re: BSD disklabel partition letters in NetBSD

[Jason Mitchell <jmitchel%bigjar.com@localhost>]

On Oct 4, 2018, at 3:59 PM, Rocky Hotas <rockyhotas%post.com@localhost> wrote:

Sent: Saturday, September 29, 2018 at 4:41 AM

From: "Jason Mitchell" <jmitchel%bigjar.com@localhost>

To: "Michael van Elst" <mlelstv%serpens.de@localhost>

Cc: netbsd-users%NetBSD.org@localhost

Subject: Re: BSD disklabel partition letters in NetBSD

[...]

I don’t think this is possible. At least I remember reading here that

FreeBSD’s disklabel is in a different place then the NetBSD’s disklabel

and that NetBSD would unintentionally overwrite FreeBSD’s disklabel. (This

seems to imply that the FreeBSD disklabel is not in the FreeBSD MBR

partition, but I’m not sure about that).

Ok, this is absolutely possible and thank for remembering this probable
issue. I put this however only as an example: the real question was not
about compatibility, but about the... cohabitation of two bootable systems ... 

This posting (though old) says that FreeBSD disklabels are different from NetBSD disklabels. Also back in 2011 NetBSD would overwrite a FreeBSD disklabel on a FreeBSD MBR partition of type 165. FYI, NetBSD has been using a MBR partition type of 169 for a long, long time.

https://mail-index.netbsd.org/tech-kern/2011/02/04/msg009919.html

My objection was to NetBSD and FreeBSD sharing a disklabel, not to two instances of NetBSD sharing a disklabel.

Thanks,

Jason M.