I installed 64bit Debian 7.6 on a 16 GB USB flash. It is labeled sdg. Upon installing it, I placed grub into sdg but not in any specific partition.

I have an identical USB flash that will contain a clone (or image) of the original USB flash. It will be labeled sdh. When I create it (by clone or image from sdg) grub will be on sdh but I will want it on sdh1.

Questions:

1) How can I safely move a grub install from sdh to sdh1?

2) The device (sdh) will have only 1 partition (sdh1) for simplicity. After relocating grub to sdh1, I want to image sdh1 and install (restore) that image to third 16 GB USB flash. Will that third USB flash be bootable after doing so?

Installing to "/dev/sdg" or "/dev/sdh" will install Grub to the master boot record of that drive. Installing it to sdh1 will install Grub to the IPL of partition one (sdh1) and you will then need to boot from some other drive which has Grub in the mbr. So if you have Grub on your "third 16GB" flash drive, you will need to put an entry in its grub menu file for the install on sdh1.

So, all booting must ultimately start from an mbr (master boot record). Is that correct?

For most users the answer is yes. In the real world no.

If you are brave then http://www.troubleshooters.com/linux...bpartition.htm

Thank you.