beautypg.com

A.5 hybrid vbr boot code – Western Digital T13/2132-D User Manual

Page 86

background image

T13/2132-D Revision 3

June 23, 2010

74

Working Draft Enhanced Disk Drive - 4 (EDD-4)

A.5 Hybrid VBR boot code

Hybrid VBR boot code is responsible for booting the OS, and is usually OS-specific. If EAX is set to "!GPT", then
hybrid VBR boot code uses the GPT Partition Entry field to identify its partition.

NOTE 6 — In contrast, legacy VBR boot code only recognizes the MBR disk layout and uses the
Starting LBA field and Size In LBA field to identify its partition.