I don't think I did anything unusual to it, but my 3100 now won't boot. I get a lot of messages like "tar: dev/rmidi1: Cannot mknod: Read-only file system" and the booting process stalls at "mkdir: Cannot create directory `/dev/shm/run/usb`: No such file or directory". If I press Ctrl+C the booting process continues, but it just gives me more errors and then automatically reboots.
I have a recent backup, but in order to use it I have to format the device, which erases the contents of the microdrive. I don't keep anything irreplaceable on there, but still it's at least a couple of hours of work to copy everything back that I had on there. Is there any other alternative to a format? And why did this happen in the first place?