On a Debian Linux box, I'm running into a very strange situation where after power-on, GRUB fails with the error "no such partition", but if I then hit the reset button, it boots normally. I'm trying to diagnose the situation, and I realized that I don't know which versions of what bootloaders are installed where? How can I find out? That is, how can I find out what bootloader is installed on the MBR of each of my disks, and how can I find out which second-stage bootloaders are installed on the various partitions?
If I can't find out exactly what I have, I'd settle for being able to find out just which version of GRUB is installed where.