Annotation of sys/sys/dkbad.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: dkbad.h,v 1.4 2003/06/02 23:28:21 millert Exp $ */
2: /* $NetBSD: dkbad.h,v 1.10 1994/12/25 13:14:21 pk Exp $ */
3:
4: /*-
5: * Copyright (c) 1982, 1986, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)dkbad.h 8.2 (Berkeley) 7/10/94
33: */
34:
35: #ifndef _SYS_DKBAD_H_
36: #define _SYS_DKBAD_H_
37:
38: /*
39: * Definitions needed to perform bad sector revectoring ala DEC STD 144.
40: *
41: * The bad sector information is located in the first 5 even numbered
42: * sectors of the last track of the disk pack. There are five identical
43: * copies of the information, described by the dkbad structure.
44: *
45: * Replacement sectors are allocated starting with the first sector before
46: * the bad sector information and working backwards towards the beginning of
47: * the disk. A maximum of 126 bad sectors are supported. The position of
48: * the bad sector in the bad sector table determines which replacement sector
49: * it corresponds to.
50: *
51: * The bad sector information and replacement sectors are conventionally
52: * only accessible through the 'c' file system partition of the disk. If
53: * that partition is used for a file system, the user is responsible for
54: * making sure that it does not overlap the bad sector information or any
55: * replacement sectors.
56: */
57: #define NBT_BAD 126
58:
59: struct dkbad {
60: int32_t bt_csn; /* cartridge serial number */
61: u_int16_t bt_mbz; /* unused; should be 0 */
62: u_int16_t bt_flag; /* -1 => alignment cartridge */
63: struct bt_bad {
64: u_int16_t bt_cyl; /* cylinder number of bad sector */
65: u_int16_t bt_trksec; /* track and sector number */
66: } bt_bad[NBT_BAD];
67: };
68:
69: #define ECC 0
70: #define SSE 1
71: #define BSE 2
72: #define CONT 3
73:
74: #endif /* _SYS_DKBAD_H_ */
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