Is RockRidge filesystem mandatory?

[bootsector]

Hi folks!

 

I was checking some Linux boot disks and some Live CDs with ISOBuster. All of them seems to have a RockRidge filesystem.

 

Now I need to rebuild one of these disks with ImgBurn and Build mode.

 

Does anyone know if these modified boot disks will boot without the RockRidge filesystem?

 

Thanks in advance!

 

bootsector

[dbminter]

I could use some help here, too, probably. The only times I've tried to create one, using a boot sector extracted from a Linux boot disc from an Acronis rescue media, I could get it to boot but not run the utilities afterwards.