Western Digital T13/2132-D Draft

June 23, 2010 T13/2132-D Revision 3

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

Secretariat

Approved mm.dd.yy

American National Standards Institute, Inc.

This standard describes services currently in use on IA-32 and IA-64 compatible architecture personal computer

systems. These services are provided by BIOS firmware to support hard disks up to 16 exabytes (16x1018

bytes). This standard also provides BIOS level services for determining the relationship between BIOS device

numbers and the physical mass storage devices attached to the personal computer. The services defined in this

standard can be applied to mass storage devices with ATA, ATAPI, SCSI, USB, Fibre Channel, 1394, I2O, and

other interfaces. In addition, this standard defines the following:

a) formatting required to make a CD or DVD bootable;

b) INT 13h services used to access devices <8GB; and

c) addressing information for Infiniband, Serial ATA, Hypertransport, and PCI Express

Draft