[PROBLEM] Upgrade to Beta troubles on usb install

[Jan]

So it seems, that xbian expects the rootfs to be btrfs and have a label xbian-root-btrfs. Would converting my current ext3 rootfs to btrfs (from what I read this can be converted) and labeling it correctly solve my problems?

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Ah, and it seems /dev/mmcblk0p2 resolves to a partition on the sd card, I no longer use. Instead I use a partition on the usb drive, something like /dev/sda1.
I wonder where I could find the piece of script that emulates fstab...