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1.1 root 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_ */
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