I have a Macbook Pro mid-2010 2.66GHz i7. The boot drive (Toshiba 500GB originally in the machine) is in an external enclosure as I am debugging a problem with the second SSD drive to fail in the last 2 weeks.
The enclosure is a OWC Mercury On-The-Go with SATA inside an FW800 and USB outside.
My problem is that the MBP will not boot from FW 800 on this enclosure, but will boot from USB. I can take this enclosure to a different MBP and it mounts fine (though I can't try to boot it because the sofware is not compatible with the other MBP).
I have another enclosure with FW 400 and USB, and the MBP will boot from the same disk in this enclosure vie either FW 400 or USB.
Any ideas about what might be wrong, and how to get the MBP to boot from FW800?
[btw, OWC is sending me a replacement enclosure, in case that's the problem, but it seems weird that I could mount the drive on a different machine but not boot from it]