mount ufs from linux

[kanonmat]

Hello! I'm in the process of installing FreeBSD. Last time I used it was when 6.0 was released and I wasn't very proficient

Mount:
Can I mount ufs from linux? How?
Vice versa: How do I mount reiserfs and ext3 from FreeBSD?

Boot managers:
I followed the advice how to boot FreeBSD with grub:
http://www.gnu.org/software/grub/man...b.html#FreeBSD
It didn't work. How do I do that?

Can I boot linuxen from the FreeBSD boot manager?

[TerryP]

You can mount ext3 as an 'ext2fs' but you may have to fsck_e2tfs it first. Resier you can mount read only as an 'reasierfs'. You might want to check out the e2fsprogs and progsreiserfs ports in sysutils. I think FreeBSD has experimental support for writing to reiserfs v3, but I'd avoid it unless you're ready for data loss (but hey, I'm paranoid).


I think modern Linux 2.6 should have READ ONLY support for UFS in it, but I dunno if it is enabled by default with any distros. Judging by a short google, I believe the command is:

mount -r -t ufs -o ufstype=ufs2 <device> <mount_dir>

but don't quote me.

No one can really help you with the boot loader issue unless you post details about your partitioning schema and BL setup. Some time ago I wrote a thing on booting BSD from various boot loaders, with having Windows & Linux on the same disk being considered. Which also carefully notes something you will find in the FreeBSD FAQ.


You can boot Linux from from boot0, but you must have a boot loader like GRUB/LILO in the Linux / partitions boot sector in order for it to work. Other wise it has no way to find the Linux kernel, in the default config.

[mdh]

The UFS on Linux may not be the FFS/UFS2 filesystem used by FreeBSD.

[adamk]

The ufs kernel module in linux supports many different ufs types :-) 44bsd, ufs2, sun, sunx86, hp, nextstep, nextstep-cd, openstep.

read-write is supported on 44bsd, ufs2, sun, and sunx86, if the module is compiled with rw support. Still not sure I would trust it read-write, though :-)

I am able to mount my freebsd slices under Slackware with:

mount -t ufs -o ro,ufstype=ufs2 /dev/sda1 /mnt

[kanonmat]

Thank you!
Sorry for the slow reply. I can mount the FreeBSD partitions read-only from Archlinux and Debian both. I haven't bothered compiling to get write access just yet. I have repartitioned BSD and made a FAT32 partition for moving/storing files. I will reinstall. I haven't configured much anyway.

Since there's a floppy on this machine, maybe I can have BSD boot from there. I'll search for how that is done.

[graudeejs]

Originally Posted by kanonmat

Since there's a floppy on this machine, maybe I can have BSD boot from there. I'll search for how that is done.

Why just not to use FreeBSD livefs cd? It will sure be faster

[kanonmat]

It will be easier and faster when it's done. I use the cd drive for other things, I really don't use the floppy drive. I can just let the floppy stay loosely in the drive slot and punch it in when I need to. No need to take time to find the livefs cd among other cd:s and put it in the tray. Maybe I'll try both methods.

[kanonmat]

rw support from linux and to some linux fs types would be a feature request from a spoiled brat like me.

The FreeBSD livefs cd has been no use to me yet. I might be very wrong, but it seems to be a slimmed down install cd1 and seems to provide nothing that cant be found on the install cd. I just end up in sysinstall and cannot get out or boot the installed system. I went ahead and tried to make a floppy with boot1 and boot2 on it. I could not find exact info on how to accomplish it. Since FreeSBIE didn't provide a Swedish keymap, I had no "=" and could not use dd. I did it in linux, mounted the slash partition and

dd if=/boot/boot1 of=/dev/fd0 bs=512 count=1
dd if=/boot/boot2 of=/dev/fd0 bs=512 seek=1

Anyway: booting from the floppy seems to have written to the mbr and now I have made my Archlinux partition unbootable, unmountable and maybe unrecoverable. No biggie, This machine is for learning. So: Don't try this at home

(I really think and type to slow for the logout timeout.)

[DNAeon]

If you need to dual boot Linux and FreeBSD - check this out. You need to edit /boot/grub/menu.lst and you are ready to go