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DISK_INT13_INFO structure (ntdddisk.h)

  • Article

The DISK_INT13_INFO structure is used by the BIOS to report disk detection data for a partition with an INT13 format.

Syntax

typedef struct _DISK_INT13_INFO {
  USHORT DriveSelect;
  ULONG  MaxCylinders;
  USHORT SectorsPerTrack;
  USHORT MaxHeads;
  USHORT NumberDrives;
} DISK_INT13_INFO, *PDISK_INT13_INFO;

Members

DriveSelect

Corresponds to the Device/Head register defined in the AT Attachment (ATA) specification. When zero, the fourth bit of this register indicates that drive zero is selected. When 1, it indicates that drive one is selected. The values of bits 0, 1, 2, 3, and 6 depend on the command in the command register. Bits 5 and 7 are no longer used. For more information about the values that the Device/Head register can hold, see the ATA specification.

MaxCylinders

Indicates the maximum number of cylinders on the disk.

SectorsPerTrack

Indicates the number of sectors per track.

MaxHeads

Indicates the maximum number of disk heads.

NumberDrives

Indicates the number of drives.

Requirements

Requirement Value
Header ntdddisk.h (include Ntdddisk.h)

See also

DISK_DETECTION_INFO

DISK_EX_INT13_INFO