I'm in the process of creating an embedded system based on Gentoo and
plan to use unionfs for the root file system, with squashfs, and would
like to know if there are any known issues with it.
Current versions are:
kernel: 2.6.14-gentoo-r5
unionfs: 1.0.14
squashfs: 2.0 (in kernel)
Here is a very basic scenario:
mount -o rw /dev/hda1 /newroot
mount -t squashfs -o loop,ro /newroot/ro/squashfs.ro /newroot/ro
mount -t unionfs -o rw,dirs=/newroot/rw=rw:/newroot/ro=ro none
/newroot/union
cd /newroot/union
pivot_root
Of course many other things will then be mounted on top of this such as
/proc, /sys, and tmpfs in various places.
Any known problems? Anything I should watch out for?
Thanks,
Rod
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