The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/sun_disklabel.h

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    1 /*
    2  * Copyright (c) 1992, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This software was developed by the Computer Systems Engineering group
    6  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
    7  * contributed to Berkeley.
    8  *
    9  * All advertising materials mentioning features or use of this software
   10  * must display the following acknowledgement:
   11  *      This product includes software developed by the University of
   12  *      California, Lawrence Berkeley Laboratory.
   13  *
   14  * Redistribution and use in source and binary forms, with or without
   15  * modification, are permitted provided that the following conditions
   16  * are met:
   17  * 1. Redistributions of source code must retain the above copyright
   18  *    notice, this list of conditions and the following disclaimer.
   19  * 2. Redistributions in binary form must reproduce the above copyright
   20  *    notice, this list of conditions and the following disclaimer in the
   21  *    documentation and/or other materials provided with the distribution.
   22  * 3. All advertising materials mentioning features or use of this software
   23  *    must display the following acknowledgement:
   24  *      This product includes software developed by the University of
   25  *      California, Berkeley and its contributors.
   26  * 4. Neither the name of the University nor the names of its contributors
   27  *    may be used to endorse or promote products derived from this software
   28  *    without specific prior written permission.
   29  *
   30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   40  * SUCH DAMAGE.
   41  *
   42  *      @(#)sun_disklabel.h     8.1 (Berkeley) 6/11/93
   43  *      $NetBSD: disklabel.h,v 1.2 1998/08/22 14:55:28 mrg Exp $
   44  *
   45  * $FreeBSD: releng/5.0/sys/sys/sun_disklabel.h 106112 2002-10-29 06:43:57Z phk $ 
   46  */
   47 
   48 /*
   49  * SunOS disk label layout (only relevant portions discovered here).
   50  */
   51 
   52 #define SUN_DKMAGIC     55998
   53 
   54 /* geometry info */
   55 struct sun_dkgeom {
   56         u_short sdkc_ncylinders;        /* data cylinders */
   57         u_short sdkc_acylinders;        /* alternate cylinders */
   58         u_short sdkc_xxx1;
   59         u_short sdkc_ntracks;           /* tracks per cylinder */
   60         u_short sdkc_xxx2;
   61         u_short sdkc_nsectors;          /* sectors per track */
   62         u_short sdkc_interleave;        /* interleave factor */
   63         u_short sdkc_xxx3;
   64         u_short sdkc_xxx4;
   65         u_short sdkc_sparespercyl;      /* spare sectors per cylinder */
   66         u_short sdkc_rpm;               /* rotational speed */
   67         u_short sdkc_pcylinders;        /* physical cylinders */
   68         u_short sdkc_xxx5[7];
   69 };
   70 
   71 /* controller info */
   72 struct sun_dkctlr {
   73         int     sdkc_addr;              /* controller address */
   74         short   sdkc_unit;              /* unit (slave) address */
   75         short   sdkc_type;              /* controller type */
   76         short   sdkc_flags;             /* flags */
   77 };
   78 
   79 /* partition info */
   80 struct sun_dkpart {
   81         u_int32_t       sdkp_cyloffset;         /* starting cylinder */
   82         u_int32_t       sdkp_nsectors;          /* number of sectors */
   83 };
   84 
   85 struct sun_disklabel {                  /* total size = 512 bytes */
   86         char            sl_text[128];
   87         char            sl_xxx1[292];
   88         u_int16_t       sl_rpm;         /* rotational speed */
   89         u_int16_t       sl_pcylinders;          /* number of physical cyls */
   90         u_int16_t       sl_sparespercyl;        /* spare sectors per cylinder */
   91         char            sl_xxx3[4];
   92         u_int16_t       sl_interleave;          /* interleave factor */
   93         u_int16_t       sl_ncylinders;          /* data cylinders */
   94         u_int16_t       sl_acylinders;          /* alternate cylinders */
   95         u_int16_t       sl_ntracks;             /* tracks per cylinder */
   96         u_int16_t       sl_nsectors;            /* sectors per track */
   97         char            sl_xxx4[4];
   98         struct sun_dkpart sl_part[8];   /* partition layout */
   99         u_int16_t       sl_magic;               /* == SUN_DKMAGIC */
  100         u_int16_t       sl_cksum;               /* xor checksum of all shorts */
  101 };
  102 
  103 #ifdef CTASSERT
  104 CTASSERT(sizeof (struct sun_disklabel) == 512);
  105 #endif

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