[apple/xnu.git] / bsd / sys / dkbad.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1993, 1994
 *	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.
 *
 *	@(#)dkbad.h	8.2 (Berkeley) 7/10/94
 */

#ifndef _SYS_DKBAD_H_
#define _SYS_DKBAD_H_

/*
 * 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 {
	int32_t   bt_csn;		/* cartridge serial number */
	u_int16_t bt_mbz;		/* unused; should be 0 */
	u_int16_t bt_flag;		/* -1 => alignment cartridge */
	struct bt_bad {
		u_int16_t bt_cyl;	/* cylinder number of bad sector */
		u_int16_t 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
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*-
	24	* Copyright (c) 1982, 1986, 1993, 1994
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. All advertising materials mentioning features or use of this software
	36	* must display the following acknowledgement:
	37	* This product includes software developed by the University of
	38	* California, Berkeley and its contributors.
	39	* 4. Neither the name of the University nor the names of its contributors
	40	* may be used to endorse or promote products derived from this software
	41	* without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	44	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	47	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*
	55	* @(#)dkbad.h 8.2 (Berkeley) 7/10/94
	56	*/
	57
	58	#ifndef _SYS_DKBAD_H_
	59	#define _SYS_DKBAD_H_
	60
	61	/*
	62	* Definitions needed to perform bad sector revectoring ala DEC STD 144.
	63	*
	64	* The bad sector information is located in the first 5 even numbered
65	* sectors of the last track of the disk pack. There are five identical
66	* copies of the information, described by the dkbad structure.
67	*
68	* Replacement sectors are allocated starting with the first sector before
69	* the bad sector information and working backwards towards the beginning of
70	* the disk. A maximum of 126 bad sectors are supported. The position of
71	* the bad sector in the bad sector table determines which replacement sector
72	* it corresponds to.
73	*
74	* The bad sector information and replacement sectors are conventionally
75	* only accessible through the 'c' file system partition of the disk. If
76	* that partition is used for a file system, the user is responsible for
77	* making sure that it does not overlap the bad sector information or any
78	* replacement sectors.
79	*/
80	struct dkbad {
81	int32_t bt_csn; /* cartridge serial number */
82	u_int16_t bt_mbz; /* unused; should be 0 */
83	u_int16_t bt_flag; /* -1 => alignment cartridge */
84	struct bt_bad {
85	u_int16_t bt_cyl; /* cylinder number of bad sector */
86	u_int16_t bt_trksec; /* track and sector number */
87	} bt_bad[126];
88	};
89
90	#define ECC 0
91	#define SSE 1
92	#define BSE 2
93	#define CONT 3
94
95	#endif /* _SYS_DKBAD_H_ */