I've got my SSD in an optibay and am using it as my boot drive. As such, I've disabled hibernation on my MBP. I am wondering about battery calibration, as you need to drain the battery down fully and have the MBP enter the hibernation state to properly calibrate the battery. Can I use my backup drive to accomplish this? I mean, can I simply boot from my backup drive once every few months, go through the normal battery calibration process, and then reset the startup disk back to my SSD afterwards. Anybody know if this work? Will I need to manually change the sleep mode in terminal each time?