// ntdddisk.h

typedef struct _DISK_CONTROLLER_NUMBER {
  ULONG ControllerNumber;
  ULONG DiskNumber;
} DISK_CONTROLLER_NUMBER, *PDISK_CONTROLLER_NUMBER;
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Windows Driver Kit DDI reference (ns-ntdddisk-_disk_controller_number)

_DISK_CONTROLLER_NUMBER structure

Description

DISK_CONTROLLER_NUMBER is used with IOCTL_DISK_CONTROLLER_NUMBER to retrieve the controller number and disk number of an IDE disk.

Members

`ControllerNumber`

Contains the number of the IDE controller for the disk.

`DiskNumber`

Contains the number of the disk.

Remarks

After DISK_CONTROLLER_NUMBER receives the controller number and the disk number, these values can be used to determine whether the disk is attached to the primary or to the secondary IDE controller.

DISK_CONTROLLER_NUMBER - NtDoc