Dual Boot Ubuntu Karmic and PCBSD?

woodmaster · 03-10-2010, 11:32 PM

Ok. so I searched for this and got sent to documentation on PCBSD's forums that say I need to manually edit /boot/grub/menu.lst to get Grub to load BSD. sudo update-grub didn't see BSD partition and there is no menu.lst??? Furthermore, I can't mount my BSD partition. I get this error:

Code:

Error mounting: mount exited with exit code 32: mount: wrong fs type, bad option, bad superblock on /dev/sdb2,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

Code:

dmesg | tail
[14127.602295] You didn't specify the type of your ufs filesystem
[14127.602298] 
[14127.602299] mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
[14127.602301] 
[14127.602302] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
[14127.603749] ufs_read_super: bad magic number
[14637.434606] ufs was compiled with read-only support, can't be mounted as read-write
[14659.430753] ufs was compiled with read-only support, can't be mounted as read-write
[14673.102535] ufs was compiled with read-only support, can't be mounted as read-write
[15374So what gives? What am I missing here? I know this should be able to be done. Using GRUB1.97 beta BTW(I refuse to call it 2.0 if it's not-IDK why it is commonly called that?) Thank-you for any help. I'd really like to try BSD..675222] ufs was compiled with read-only support, can't be mounted as read-write

So what gives? What am I missing here? I know this should be able to be done. Using GRUB1.97 beta BTW(I refuse to call it 2.0 if it's not-IDK why it is commonly called that?) Thank-you for any help. I'd really like to try BSD.

Mr-Bisquit · 03-11-2010, 01:04 AM

Code:

#fdisk -l

Sample output:
Disk /dev/sda: 40.0 GB, 40007761920 bytes
255 heads, 63 sectors/track, 4864 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xa8a8a8a8

Device Boot Start End Blocks Id System
/dev/sda1 1 2423 19455880+ a5 FreeBSD
Partition 1 does not end on cylinder boundary.
/dev/sda2 * 2423 4801 19101696 83 Linux
/dev/sda3 4801 4864 512000 82 Linux swap / Solaris

Edit grub manually:

Sample:
title FreeBSD i386 8.0
rootnoverify (hd0,0)<-- Make this what your output is on fdisk
chainloader +1 <-- loads the freebsd or pcbsd bootloader

Code:

mount -t ufs -o ufstype=ufs2 -o ro /dev/sda1 /mnt
ls /mnt
bin   cdrom   COPYRIGHT  entropy  home  libexec  mnt   rescue  sbin  tmp  var
boot  compat  dev        etc      lib   media    proc  root    sys   usr

Use the corresponding fdisk output for your partition.
Unmount with

Code:

umount /dev/sda1

You won't be able to read home directories from Linux.
Also, reading ext4 from FreeBSD won't be easy. I hope you used ext3 or are up to some patching.

JZL240I-U · 03-11-2010, 06:45 AM

Ubuntu uses GRUB2 while the description you quote (and also the one above from Mr-Bisquit) is for the old GRUB. Here is some information on GRUB2:

http://ubuntuforums.org/printthread.php?t=1195275
http://www.dedoimedo.com/computers/grub-2.html

I don't use it, so I can't help you.

Furthermore you should change your /etc/fstab. This error from your post

Code:

mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...

shows how to do it.