The Hard Drive Media Device Path is used to represent a partition on a hard drive. More...

#include <DevicePath.h>

Data Fields
EFI_DEVICE_PATH_PROTOCOL	Header

UINT32	PartitionNumber
	Describes the entry in a partition table, starting with entry 1. More...

UINT64	PartitionStart
	Starting LBA of the partition on the hard drive. More...

UINT64	PartitionSize
	Size of the partition in units of Logical Blocks. More...

UINT8	Signature [16]
	Signature unique to this partition: If SignatureType is 0, this field has to be initialized with 16 zeros. More...

UINT8	MBRType
	Partition Format: (Unused values reserved). More...

UINT8	SignatureType
	Type of Disk Signature: (Unused values reserved). More...

Detailed Description

The Hard Drive Media Device Path is used to represent a partition on a hard drive.

Definition at line 1001 of file DevicePath.h.

Field Documentation

◆ Header

EFI_DEVICE_PATH_PROTOCOL HARDDRIVE_DEVICE_PATH::Header

Definition at line 1002 of file DevicePath.h.

◆ PartitionNumber

UINT32 HARDDRIVE_DEVICE_PATH::PartitionNumber

Describes the entry in a partition table, starting with entry 1.

Partition number zero represents the entire device. Valid partition numbers for a MBR partition are [1, 4]. Valid partition numbers for a GPT partition are [1, NumberOfPartitionEntries].

Definition at line 1009 of file DevicePath.h.

◆ PartitionStart

UINT64 HARDDRIVE_DEVICE_PATH::PartitionStart

Starting LBA of the partition on the hard drive.

Definition at line 1013 of file DevicePath.h.

◆ PartitionSize

UINT64 HARDDRIVE_DEVICE_PATH::PartitionSize

Size of the partition in units of Logical Blocks.

Definition at line 1017 of file DevicePath.h.

◆ Signature

UINT8 HARDDRIVE_DEVICE_PATH::Signature[16]

Signature unique to this partition: If SignatureType is 0, this field has to be initialized with 16 zeros.

If SignatureType is 1, the MBR signature is stored in the first 4 bytes of this field. The other 12 bytes are initialized with zeros. If SignatureType is 2, this field contains a 16 byte signature.

Definition at line 1025 of file DevicePath.h.

Referenced by efi_path_guid().

◆ MBRType

UINT8 HARDDRIVE_DEVICE_PATH::MBRType

Partition Format: (Unused values reserved).

0x01 - PC-AT compatible legacy MBR. 0x02 - GUID Partition Table.

Definition at line 1031 of file DevicePath.h.

◆ SignatureType

UINT8 HARDDRIVE_DEVICE_PATH::SignatureType

Type of Disk Signature: (Unused values reserved).

0x00 - No Disk Signature. 0x01 - 32-bit signature from address 0x1b8 of the type 0x01 MBR. 0x02 - GUID signature.

Definition at line 1038 of file DevicePath.h.