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-The BFS filesystem is used by SCO UnixWare OS for the /stand slice, which
-usually contains the kernel image and a few other files required for the
-boot process.
-In order to access /stand partition under Linux you obviously need to
-know the partition number and the kernel must support UnixWare disk slices
-(CONFIG_UNIXWARE_DISKLABEL config option). However BFS support does not
-depend on having UnixWare disklabel support because one can also mount
-BFS filesystem via loopback:
-# losetup /dev/loop0 stand.img
-# mount -t bfs /dev/loop0 /mnt/stand
-where stand.img is a file containing the image of BFS filesystem.
-When you have finished using it and umounted you need to also deallocate
-/dev/loop0 device by:
-# losetup -d /dev/loop0
-You can simplify mounting by just typing:
-# mount -t bfs -o loop stand.img /mnt/stand
-this will allocate the first available loopback device (and load loop.o
-kernel module if necessary) automatically. If the loopback driver is not
-loaded automatically, make sure that you have compiled the module and
-that modprobe is functioning. Beware that umount will not deallocate
-/dev/loopN device if /etc/mtab file on your system is a symbolic link to
-/proc/mounts. You will need to do it manually using "-d" switch of
-losetup(8). Read losetup(8) manpage for more info.
-To create the BFS image under UnixWare you need to find out first which
-slice contains it. The command prtvtoc(1M) is your friend:
-# prtvtoc /dev/rdsk/c0b0t0d0s0
-(assuming your root disk is on target=0, lun=0, bus=0, controller=0). Then you
-look for the slice with tag "STAND", which is usually slice 10. With this
-information you can use dd(1) to create the BFS image:
-# umount /stand
-# dd if=/dev/rdsk/c0b0t0d0sa of=stand.img bs=512
-Just in case, you can verify that you have done the right thing by checking
-the magic number:
-# od -Ad -tx4 stand.img | more
-The first 4 bytes should be 0x1badface.
-If you have any patches, questions or suggestions regarding this BFS
-implementation please contact the author:
-Tigran Aivazian <>