projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b688fc87 WJ |
1 | /*- |
| 2 | * Copyright (c) 1982, 1986 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | * | |
| 33 | * @(#)dkbad.h 7.2 (Berkeley) 2/15/91 | |
| 34 | */ | |
| 35 | ||
| 36 | /* | |
| 37 | * Definitions needed to perform bad sector revectoring ala DEC STD 144. | |
| 38 | * | |
| 39 | * The bad sector information is located in the first 5 even numbered | |
| 40 | * sectors of the last track of the disk pack. There are five identical | |
| 41 | * copies of the information, described by the dkbad structure. | |
| 42 | * | |
| 43 | * Replacement sectors are allocated starting with the first sector before | |
| 44 | * the bad sector information and working backwards towards the beginning of | |
| 45 | * the disk. A maximum of 126 bad sectors are supported. The position of | |
| 46 | * the bad sector in the bad sector table determines which replacement sector | |
| 47 | * it corresponds to. | |
| 48 | * | |
| 49 | * The bad sector information and replacement sectors are conventionally | |
| 50 | * only accessible through the 'c' file system partition of the disk. If | |
| 51 | * that partition is used for a file system, the user is responsible for | |
| 52 | * making sure that it does not overlap the bad sector information or any | |
| 53 | * replacement sectors. | |
| 54 | */ | |
| 55 | struct dkbad { | |
| 56 | long bt_csn; /* cartridge serial number */ | |
| 57 | u_short bt_mbz; /* unused; should be 0 */ | |
| 58 | u_short bt_flag; /* -1 => alignment cartridge */ | |
| 59 | struct bt_bad { | |
| 60 | u_short bt_cyl; /* cylinder number of bad sector */ | |
| 61 | u_short bt_trksec; /* track and sector number */ | |
| 62 | } bt_bad[126]; | |
| 63 | }; | |
| 64 | ||
| 65 | #define ECC 0 | |
| 66 | #define SSE 1 | |
| 67 | #define BSE 2 | |
| 68 | #define CONT 3 |