TRACKLAYOUT

TRACKLAYOUT

Track layout.

Type

BYTE      bCommand
USHORT    usHead
USHORT    usCylinder
USHORT    usFirstSector
USHORT    cSectors
struct {
  USHORT  usSectorNumber
  USHORT  usSectorSize
} TrackTable[1];

C Declaration Method

typedef struct

Fields

bCommand

Command information.

Bit 0 If 0, the track layout contains nonconsecutive sectors or does not start with Sector 1. If set (1), the track layout starts with Sector 1 and contains only consecutive sectors. All other bits are reserved and must be set to 0.

usHead

Physical head on the device that performs the operation.

usCylinder

Cylinder to be written, read, or verified.

usFirstSector

Logical sector number within the Track Layout Table that starts the I/O operation.

All the sector numbers start with 0. For example the third sector is number 2.

cSectors

Number of sectors to read, write, or verify.

This value must be less than or equal to the maximum number number of sectors specified in the track table.

The IOCtl subfunctions do not step heads or tracks.

usSectorNumber

Sector number.

There must be one usSectorNumber and usSectorSize in the track layout table for every sector, up to cSectors sectors.

usSectorSize

Sector size.

There must be one usSectorNumber and usSectorSize in the track layout table for every sector, up to cSectors sectors.