maybe this can serve as a "near-miss" or lesson to someone.
i had an interesting situation this week where i recorded the opening set, and then powered everything off during set changes. when i powered back on, the display read "card error" and "SD unformatted", and then the standby display read "no card." (instead of "no song" when you have a blank card) . i was pissed b/c i thought i would have to format the card, i headed down thatpath, it asked me if i was sure, and i said no. powered off the unit. popped out the SD card, popped it back in, and powered up. it read the card fine, and my opener file was still on there. and i started the file for the main band at that point . FWIW this was w/ a 2G card.
came real close to having to reformat and losing the first file. no idea why it couldnt read the card though....