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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1991,1997-1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_DKBAD_H
#define _SYS_DKBAD_H
#pragma ident "%Z%%M% %I% %E% SMI" /* UCB 4.3 81/05/10 */
#ifdef __cplusplus
extern "C" {
#endif
/*
* Definitions needed to perform bad sector
* revectoring ala DEC STD 144.
*
* The bad sector information is located in the
* first 5 even numbered sectors of the last
* track of the disk pack. There are five
* identical copies of the information, described
* by the dkbad structure.
*
* Replacement sectors are allocated starting with
* the first sector before the bad sector information
* and working backwards towards the beginning of
* the disk. A maximum of 126 bad sectors are supported.
* The position of the bad sector in the bad sector table
* determines which replacement sector it corresponds to.
*
* The bad sector information and replacement sectors
* are conventionally only accessible through the
* 'c' file system partition of the disk. If that
* partition is used for a file system, the user is
* responsible for making sure that it does not overlap
* the bad sector information or any replacement sector.s
*/
#define NDKBAD 126 /* # of entries maximum */
struct dkbad {
long bt_csn; /* cartridge serial number */
ushort_t bt_mbz; /* unused; should be 0 */
ushort_t bt_flag; /* -1 => alignment cartridge */
struct bt_bad {
short bt_cyl; /* cylinder number of bad sector */
short bt_trksec; /* track and sector number */
} bt_bad[NDKBAD];
};
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DKBAD_H */
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