IOCTL_DISK_GET_DRIVE_GEOMETRY IOCTL (ntdddisk.h)
Returns information about the physical disk's geometry (media type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector).
Major code
Input buffer
None
Input buffer length
None
Output buffer
The driver returns the DISK_GEOMETRY data in the buffer at Irp->AssociatedIrp.SystemBuffer.
Output buffer length
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).
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
| Requirement | Value |
|---|---|
| Header | ntdddisk.h (include Ntdddisk.h) |