-boot-load-size load_sectors
Specifies the number of "virtual" (512-byte) sectors to load in
no-emulation mode. The default is to load the entire boot
file. Some BIOSes may have problems if this is not a multiple
of 4.
-boot-info-table
Specifies that a 56-byte table with information of the CD-ROM
layout will be patched in at offset 8 in the boot file. If
this option is given, the boot file is modified in the source
filesystem, so make sure to make a copy if this file cannot be
easily regenerated! See the EL TORITO BOOT INFO TABLE section
for a description of this table.