Originally Posted by Odia
The backup partition will be populated if you have updated the firmware at least once, but flashing just a kernel does not count.
If I may ask: After a couple of flashes, if one partition got corrupted but the phone was successfully re-flashed (let's say using the Jig to boot), is the 'damaged' bootloader section rebuilt based on the 'healthy' section.
I could not find any specific info on this.
Samsung Galaxy SIII - Virgin Mobile running on Koodo, Unlocked, Rooted