When I was trying to find proper kernel configs for the dockstar, I had to try several builds. Everytime my kernel didn't boot I had to revert the arcNumber and install a working kernel again.
There are two ways to test a kernel:
- Grab another USB stick, make a backup and try the kernel on this backup. If you always do a new backup before testing another build, it will take a long time.
- Test the kernel on the running system (or a backup-stick) and reinstall another kernel in case yours wont boot. In difference to 1. you do this in a chrooted jail.
I want to explain how you do the chroot thing with some lines.