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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*-
27: * Copyright (c) 1982, 1986, 1993, 1994
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)dkbad.h 8.2 (Berkeley) 7/10/94
59: */
60:
61: #ifndef _SYS_DKBAD_H_
62: #define _SYS_DKBAD_H_
63:
64: /*
65: * Definitions needed to perform bad sector revectoring ala DEC STD 144.
66: *
67: * The bad sector information is located in the first 5 even numbered
68: * sectors of the last track of the disk pack. There are five identical
69: * copies of the information, described by the dkbad structure.
70: *
71: * Replacement sectors are allocated starting with the first sector before
72: * the bad sector information and working backwards towards the beginning of
73: * the disk. A maximum of 126 bad sectors are supported. The position of
74: * the bad sector in the bad sector table determines which replacement sector
75: * it corresponds to.
76: *
77: * The bad sector information and replacement sectors are conventionally
78: * only accessible through the 'c' file system partition of the disk. If
79: * that partition is used for a file system, the user is responsible for
80: * making sure that it does not overlap the bad sector information or any
81: * replacement sectors.
82: */
83: struct dkbad {
84: int32_t bt_csn; /* cartridge serial number */
85: u_int16_t bt_mbz; /* unused; should be 0 */
86: u_int16_t bt_flag; /* -1 => alignment cartridge */
87: struct bt_bad {
88: u_int16_t bt_cyl; /* cylinder number of bad sector */
89: u_int16_t bt_trksec; /* track and sector number */
90: } bt_bad[126];
91: };
92:
93: #define ECC 0
94: #define SSE 1
95: #define BSE 2
96: #define CONT 3
97:
98: #endif /* _SYS_DKBAD_H_ */
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