IOCTL_DISK_GET_DRIVE_GEOMETRY control code

Returns information about the physical disk's geometry (media type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector).

Input Parameters

Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer, which must be >= sizeof(DISK_GEOMETRY).

Output Parameters

The driver returns the DISK_GEOMETRY data in the buffer at Irp->AssociatedIrp.SystemBuffer.

I/O Status Block

The Information field is set to the size, in bytes, of the returned data. The Status field can be set to STATUS_SUCCESS, or possibly to STATUS_UNRECOGNIZED_MEDIA, STATUS_INVALID_PARAMETER, STATUS_INVALID_DEVICE_REQUEST, STATUS_INFO_LENGTH_MISMATCH, STATUS_INSUFFICIENT_RESOURCES, or STATUS_BUFFER_TOO_SMALL.

Requirements

Header

Ntdddisk.h (include Ntdddisk.h)

See also

DISK_GEOMETRY

 

 

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