Multiple disks with identical partition names

(cross-posted from the Mac Ach:)
Just a day before the announcement of the FW800less BunnyBooks, I bought me an FW800 external, to boot my PB off while working at home.
I intend to clone my internal to it, keeping the same organisation in which for instance I have partitions OSX1 (root) and OSX2 (case sensitive), with a softlink work -> /Volumes/OSX2/Users/bertin/work in my home directory. Rather than calling my external partitions OSX1e and OSX2e (for instance), and having to modify all my links, I'd prefer to call the external partitions OSX1 and OSX2 too. (This means I could keep the 2 disks synchronised easily.) OS X handles this correctly by changing the mountpoint name in /Volumes on the fly.
My question is about the mount order during booting. When I boot from the external, its partitions will be /dev/disk0s*, but does that mean that /Volumes/OSX1 and /Volumes/OSX2 will be guaranteed to point to the external disk's partitions (and to the internal disk's when booting off that one)?
Thanks,
René

(cross-posted from the Mac Ach:)
Just a day before the announcement of the FW800less BunnyBooks, I bought me an FW800 external, to boot my PB off while working at home.
I intend to clone my internal to it, keeping the same organisation in which for instance I have partitions OSX1 (root) and OSX2 (case sensitive), with a softlink work -> /Volumes/OSX2/Users/bertin/work in my home directory. Rather than calling my external partitions OSX1e and OSX2e (for instance), and having to modify all my links, I'd prefer to call the external partitions OSX1 and OSX2 too. (This means I could keep the 2 disks synchronised easily.) OS X handles this correctly by changing the mountpoint name in /Volumes on the fly.
My question is about the mount order during booting. When I boot from the external, its partitions will be /dev/disk0s*, but does that mean that /Volumes/OSX1 and /Volumes/OSX2 will be guaranteed to point to the external disk's partitions (and to the internal disk's when booting off that one)?
Thanks,
René

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