[voyage-linux] "voyageifying" Ubuntu 9.10

[gravyface]

Hello all,

I've been happily using voyage linux on a few ALIX boards for the last year;
works a treat.

Latest project involves creating a thin client based off of Ubuntu 9.10
using aufs and the voyage-linux' rootaufs script to hopefully bring some
glorious read-only remountrw/remountro features for my thin client.

Following these[1] instructions, I'm at a point where when I remountrw, I
can modify a file in the /ro mount of the root partition, remountro, reboot,
and it's there.  However, I'm missing the "magic" that happens in
voyage-linux whereas the aufs writes get committed to the real root, so that
running various scripts, etc. are also permanent.

I'm obviously missing something (and have not dipped into the deep end of
the pool before either, so all this is new to me).

1. https://help.ubuntu.com/community/aufsRootFileSystemOnUsbFlash

/dev/sda1 (my CompactFlash card) was installed with Ubuntu 9.10 (kernel
2.6.31-20) using Ext4.  I've read that Ext4 and Aufs don't get along unless
you set rootflags=barrier=0 on the kernel line in GRUB.  That hasn't made a
difference in this behavior.

I can provide more information if required.
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