Annotation of sys/sys/dkbad.h, Revision 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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