I have 3 physical drives in my Mac Pro with OSX 10.6.4. Occasionally after rebooting the machine, the disk numbering changes such that the /dev/disk# does not reference the same drive as it did before the reboot.
/dev/disk0 -> 64GB SSD drive /dev/disk1 -> 640GB Hitachi /dev/disk2 -> 160GB WD (BootCamp)
After rebooting the mapping might be
/dev/disk0 -> 160GB WD (BootCamp) /dev/disk1 -> 640GB Hitachi /dev/disk2 -> 64GB SSD drive
Even more confusing is that the remapping is not consistent. For most stuff this is irrelevant. However I also have Parallels installed to allow access to the BootCamp partition from within OSX. Parallels uses the /dev/disk# path in it's configuration file so, after rebooting OSX I launch Parallels and it tells me that the disk is no longer present.
Is there a way to tell OSX to always assign a given drive to /dev/disk0?