[unix-history] / sys / sys / dkbad.h

/*-
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * 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.
 *
 *	from: @(#)dkbad.h	7.2 (Berkeley) 2/15/91
 *	$Id: dkbad.h,v 1.2 1993/10/16 17:16:35 rgrimes Exp $
 */

#ifndef _SYS_DKBAD_H_
#define _SYS_DKBAD_H_ 1

/*
 * Definitions needed to perform bad sector revectoring ala DEC STD 144.
 *
 * The bad sector information is located in the first 5 even numbered
 * sectors of the last track of the disk pack.  There are five identical
 * copies of the information, described by the dkbad structure.
 *
 * Replacement sectors are allocated starting with the first sector before
 * the bad sector information and working backwards towards the beginning of
 * the disk.  A maximum of 126 bad sectors are supported.  The position of
 * the bad sector in the bad sector table determines which replacement sector
 * it corresponds to.
 *
 * The bad sector information and replacement sectors are conventionally
 * only accessible through the 'c' file system partition of the disk.  If
 * that partition is used for a file system, the user is responsible for
 * making sure that it does not overlap the bad sector information or any
 * replacement sectors.
 */
struct dkbad {
	long bt_csn;			/* cartridge serial number */
	u_short bt_mbz;			/* unused; should be 0 */
	u_short bt_flag;		/* -1 => alignment cartridge */
	struct bt_bad {
		u_short bt_cyl;		/* cylinder number of bad sector */
		u_short bt_trksec;	/* track and sector number */
	} bt_bad[126];
};

#define	ECC	0
#define	SSE	1
#define	BSE	2
#define	CONT	3
#endif /* _SYS_DKBAD_H_ */
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1982, 1986 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
01e1b05c	33	* from: @(#)dkbad.h 7.2 (Berkeley) 2/15/91
bcdc7290	34	* $Id: dkbad.h,v 1.2 1993/10/16 17:16:35 rgrimes Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
bcdc7290 GW	37	#ifndef _SYS_DKBAD_H_
	38	#define _SYS_DKBAD_H_ 1
	39
15637ed4 RG	40	/*
	41	* Definitions needed to perform bad sector revectoring ala DEC STD 144.
	42	*
	43	* The bad sector information is located in the first 5 even numbered
	44	* sectors of the last track of the disk pack. There are five identical
	45	* copies of the information, described by the dkbad structure.
	46	*
	47	* Replacement sectors are allocated starting with the first sector before
	48	* the bad sector information and working backwards towards the beginning of
	49	* the disk. A maximum of 126 bad sectors are supported. The position of
	50	* the bad sector in the bad sector table determines which replacement sector
	51	* it corresponds to.
	52	*
	53	* The bad sector information and replacement sectors are conventionally
	54	* only accessible through the 'c' file system partition of the disk. If
	55	* that partition is used for a file system, the user is responsible for
	56	* making sure that it does not overlap the bad sector information or any
	57	* replacement sectors.
	58	*/
	59	struct dkbad {
	60	long bt_csn; /* cartridge serial number */
	61	u_short bt_mbz; /* unused; should be 0 */
	62	u_short bt_flag; /* -1 => alignment cartridge */
	63	struct bt_bad {
	64	u_short bt_cyl; /* cylinder number of bad sector */
	65	u_short bt_trksec; /* track and sector number */
	66	} bt_bad[126];
	67	};
	68
	69	#define ECC 0
	70	#define SSE 1
	71	#define BSE 2
	72	#define CONT 3
bcdc7290	73	#endif /* _SYS_DKBAD_H_ */