本标准描述了当前在IA-32和IA-64体系结构个人计算机上使用的服务 系统。这些服务由BIOS固件提供，以支持高达16兆兆兆兆兆字节的硬盘 （16x10 18）。该标准还提供BIOS级别的服务，用于确定 BIOS设备编号和连接到个人计算机的物理大容量存储设备。这个 本标准中定义的服务可应用于具有ATA、ATAPI、SCSI、USB、， 光纤通道、1394、i2o和其他接口。

This standard describes services currently in use on IA-32 and IA-64 architecture personal computer systems. These services are provided by BIOS firmware to support hard disks up to 16 mega-tera-bytes (16x10 18 ). 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, I2 O, and other interfaces.