iPXE
Data Fields
HARDDRIVE_DEVICE_PATH Struct Reference

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 956 of file DevicePath.h.

Field Documentation

◆ Header

EFI_DEVICE_PATH_PROTOCOL HARDDRIVE_DEVICE_PATH::Header

Definition at line 957 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 964 of file DevicePath.h.

◆ PartitionStart

UINT64 HARDDRIVE_DEVICE_PATH::PartitionStart

Starting LBA of the partition on the hard drive.

Definition at line 968 of file DevicePath.h.

◆ PartitionSize

UINT64 HARDDRIVE_DEVICE_PATH::PartitionSize

Size of the partition in units of Logical Blocks.

Definition at line 972 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 980 of file DevicePath.h.

◆ MBRType

UINT8 HARDDRIVE_DEVICE_PATH::MBRType

Partition Format: (Unused values reserved).

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

Definition at line 986 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 993 of file DevicePath.h.


The documentation for this struct was generated from the following file: