Date: Fri, 28 Jan 2005 14:21:15 -0800 From: "Loren M. Lang" <lorenl@alzatex.com> To: Scott Bennett <bennett@cs.niu.edu> Cc: freebsd-questions@freebsd.org Subject: Re: How does FreeBSD access NetBSD, OpenBSD? Message-ID: <20050128222115.GF8442@alzatex.com> In-Reply-To: <200501281708.j0SH88Aq007311@mp.cs.niu.edu> References: <200501281708.j0SH88Aq007311@mp.cs.niu.edu>
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On Fri, Jan 28, 2005 at 11:08:08AM -0600, Scott Bennett wrote: > On Fri, 28 Jan 2005 11:18:55 -0500 (EST) Jerry McAllister > <jerrymc@clunix.cl.msu.edu> wrote: > >> > >> 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. > > Not true. In fact, I have 8 slices on one of my drives. The slice > entries in the Master Boot Record, wherein they are known as "primary > partition" entries, are four in number, but one of those four can point, > instead of to a "partition" (i.e., "slice" in UNIX terms), to a chain of > "logical partition" table entries, known collectively as the "extended > partition". The FreeBSD kernel appears to have no trouble with this at > all. > The main limitation w.r.t. FreeBSD is that the slice containing the > bootable root file system must be a "primary" rather than a "logical". > This limitation probably means that FreeBSD's boot loader isn't smart > enough to understand and follow the logical partition/slice chain to > locate the file system containing the kernel to be loaded. From what > I've read, LINUX's LILO boot loader *can* do this. Perhaps the FreeBSD > loader will be made smarter someday, but I'd guess that would be a low- > priority item on the developer team's to-do list. Actually, I'm using grub for the MBR bootloader which then loads linux/bsd. Because of this I can have NetBSD entirely in my extended partition like listed above. You can do the same with grub and FreeBSD. > > > Scott Bennett, Comm. ASMELG, CFIAG > ********************************************************************** > * Internet: bennett at cs.niu.edu * > *--------------------------------------------------------------------* > * "A well regulated and disciplined militia, is at all times a good * > * objection to the introduction of that bane of all free governments * > * -- a standing army." * > * -- Gov. John Hancock, New York Journal, 28 January 1790 * > ********************************************************************** -- I sense much NT in you. NT leads to Bluescreen. Bluescreen leads to downtime. Downtime leads to suffering. NT is the path to the darkside. Powerful Unix is. Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc Fingerprint: B3B9 D669 69C9 09EC 1BCD 835A FAF3 7A46 E4A3 280C
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