## Physical Device Driver Reference

[prev][next][parent][TOC]

### Fh - Remarks

The physical device driver must perform the following actions:

Set the busy bit of the status WORD to:

1 - If the media is nonremovable
0 - If the media is removable.

Set the status WORD in the request header

The physical device driver receives this request packet when an application issues an IOCtl function call to determine whether it is dealing with a removable or nonremovable media drive. For example, removable or nonremovable drives can print different versions of some prompts.