Did you mess with your fstab at all? What were you doing last time before shutdown?
I highly doubt glibc would just 'vanish'
Unless there is a possibility of the drive going 'bad'? You might wanna boot into rescue mode and run fsck on your / partition to see if something is terribly wrong. Also, if possible, boot up into rescue mode and grab a copy of your fstab for us, post it up. Last thing, see if that file actually exists at that point, if not, maybe look into symlinking it to that point.
Cool
