1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1991,1997-1998 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _SYS_DKBAD_H 28 #define _SYS_DKBAD_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* UCB 4.3 81/05/10 */ 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * Definitions needed to perform bad sector 38 * revectoring ala DEC STD 144. 39 * 40 * The bad sector information is located in the 41 * first 5 even numbered sectors of the last 42 * track of the disk pack. There are five 43 * identical copies of the information, described 44 * by the dkbad structure. 45 * 46 * Replacement sectors are allocated starting with 47 * the first sector before the bad sector information 48 * and working backwards towards the beginning of 49 * the disk. A maximum of 126 bad sectors are supported. 50 * The position of the bad sector in the bad sector table 51 * determines which replacement sector it corresponds to. 52 * 53 * The bad sector information and replacement sectors 54 * are conventionally only accessible through the 55 * 'c' file system partition of the disk. If that 56 * partition is used for a file system, the user is 57 * responsible for making sure that it does not overlap 58 * the bad sector information or any replacement sector.s 59 */ 60 61 #define NDKBAD 126 /* # of entries maximum */ 62 63 struct dkbad { 64 long bt_csn; /* cartridge serial number */ 65 ushort_t bt_mbz; /* unused; should be 0 */ 66 ushort_t bt_flag; /* -1 => alignment cartridge */ 67 struct bt_bad { 68 short bt_cyl; /* cylinder number of bad sector */ 69 short bt_trksec; /* track and sector number */ 70 } bt_bad[NDKBAD]; 71 }; 72 73 #ifdef __cplusplus 74 } 75 #endif 76 77 #endif /* _SYS_DKBAD_H */ 78