greengoat

Hi guys. I've been using the Hi-MD MZ-RH1 for a couple years to record my own music compositions. Recently I was reviewing one of my discs and I noticed 70 some tracks were missing! They simply skipped from track 230 to track 300 or so. I also noticed that that the tracks prior to the skip all have the letter "G" by them (not "gp" as in group, but just "G"). Does anyone here know what might have happened, and if there is a way for me to recover the missing tracks?? I would appreciate your help so much, these are irreplaceable to me!!