diff --git a/sys/sys/disk.h b/sys/sys/disk.h
deleted file mode 100644
index a028c9ccbf98..000000000000
--- a/sys/sys/disk.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Copyright (c) 1992, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This software was developed by the Computer Systems Engineering group
- * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
- * contributed to Berkeley.
- *
- * All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Lawrence Berkeley Laboratory.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)disk.h	8.1 (Berkeley) 6/2/93
- *
- * $Id: disk.h,v 1.8 1997/09/21 22:09:05 gibbs Exp $
- */
-
-#ifndef _SYS_DISK_H_
-#define _SYS_DISK_H_
-
-/*
- * Disk device structures.
- *
- * Note that this is only a preliminary outline.  The final disk structures
- * may be somewhat different.
- */
-struct buf;
-
-struct dkdevice {
-	struct	device dk_dev;		/* base device */
-	struct	dkdevice *dk_next;	/* list of disks; not yet used */
-	int	dk_bps;			/* xfer rate: bytes per second */
-	int	dk_bopenmask;		/* block devices open */
-	int	dk_copenmask;		/* character devices open */
-	int	dk_openmask;		/* composite (bopen|copen) */
-	int	dk_state;		/* label state   ### */
-	int	dk_blkshift;		/* shift to convert DEV_BSIZE to blks */
-	int	dk_byteshift;		/* shift to convert bytes to blks */
-	struct	dkdriver *dk_driver;	/* pointer to driver */
-	daddr_t	dk_labelsector;		/* sector containing label */
-	struct	disklabel dk_label;	/* label */
-};
-
-struct dkdriver {
-	void	(*d_strategy) __P((struct buf *));
-#ifdef notyet
-	int	(*d_open) __P((dev_t dev, int ifmt, int, struct proc *));
-	int	(*d_close) __P((dev_t dev, int, int ifmt, struct proc *));
-	int	(*d_ioctl) __P((dev_t dev, int cmd, caddr_t data, int fflag,
-				struct proc *));
-	int	(*d_dump) __P((dev_t));
-	void	(*d_start) __P((struct buf *, daddr_t));
-	int	(*d_mklabel) __P((struct dkdevice *));
-#endif
-};
-
-/* states */
-#define	DK_CLOSED	0		/* drive is closed */
-#define	DK_WANTOPEN	1		/* drive being opened */
-#define	DK_WANTOPENRAW	2		/* drive being opened */
-#define	DK_RDLABEL	3		/* label being read */
-#define	DK_OPEN		4		/* label read, drive open */
-#define	DK_OPENRAW	5		/* open without label */
-
-#ifdef DISKSORT_STATS
-/*
- * Stats from disksort().
- */
-struct disksort_stats {
-	long	ds_newhead;		/* # new queue heads created */
-	long	ds_newtail;		/* # new queue tails created */
-	long	ds_midfirst;		/* # insertions into sort list */
-	long	ds_endfirst;		/* # insertions at end of sort list */
-	long	ds_newsecond;		/* # inversions (2nd lists) created */
-	long	ds_midsecond;		/* # insertions into 2nd list */
-	long	ds_endsecond;		/* # insertions at end of 2nd list */
-};
-#endif
-
-#endif