BSD 4_3_Net_2 release

[unix-history] / usr / src / sbin / disklabel / disklabel.5.5

diff --git a/usr/src/sbin/disklabel/disklabel.5.5 b/usr/src/sbin/disklabel/disklabel.5.5
index ec4e783..5ede80b 100644 (file)
--- a/usr/src/sbin/disklabel/disklabel.5.5
+++ b/usr/src/sbin/disklabel/disklabel.5.5
@@ -1,27 +1,55 @@
-.\" Copyright (c) 1987 Regents of the University of California.
+.\" Copyright (c) 1987, 1991 Regents of the University of California.

 .\" All rights reserved.
 .\"
 .\" This code is derived from software contributed to Berkeley by
 .\" Symmetric Computer Systems.
 .\"
 .\" All rights reserved.
 .\"
 .\" This code is derived from software contributed to Berkeley by
 .\" Symmetric Computer Systems.
 .\"

-.\" %sccs.include.redist.man%
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by the University of
+.\"    California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.

 .\"
 .\"

-.\"    @(#)disklabel.5.5       6.5 (Berkeley) %G%
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.

 .\"
 .\"

-.TH DISKLABEL 5 ""
-.UC 7
-.SH NAME
-disklabel \- disk pack label
-.SH SYNOPSIS
-.B #include <sys/disklabel.h>
-.SH DESCRIPTION
+.\"     @(#)disklabel.5.5      6.6 (Berkeley) 5/10/91
+.\"
+.Dd May 10, 1991
+.Dt DISKLABEL 5
+.Os
+.Sh NAME
+.Nm disklabel
+.Nd disk pack label
+.Sh SYNOPSIS
+.Fd #include <sys/disklabel.h>
+.Sh DESCRIPTION

 Each disk or disk pack on a system may contain a disk label
 which provides detailed information
 about the geometry of the disk and the partitions into which the disk
 is divided.
 It should be initialized when the disk is formatted,
 and may be changed later with the
 Each disk or disk pack on a system may contain a disk label
 which provides detailed information
 about the geometry of the disk and the partitions into which the disk
 is divided.
 It should be initialized when the disk is formatted,
 and may be changed later with the

-.IR disklabel (8)
+.Xr disklabel 8

 program.
 This information is used by the system disk driver and by the bootstrap
 program to determine how to program the drive
 program.
 This information is used by the system disk driver and by the bootstrap
 program to determine how to program the drive


@@ -32,60 +60,63 @@ The description of each partition contains an identifier for the partition
 type (standard filesystem, swap area, etc.).
 The filesystem updates the in-core copy of the label if it contains
 incomplete information about the filesystem.
 type (standard filesystem, swap area, etc.).
 The filesystem updates the in-core copy of the label if it contains
 incomplete information about the filesystem.

-.PP
+.Pp

 The label is located in sector number
 The label is located in sector number

-.I LABELSECTOR
+.Dv LABELSECTOR

 of the drive, usually sector 0 where it may be found
 without any information about the disk geometry.
 It is at an offset
 of the drive, usually sector 0 where it may be found
 without any information about the disk geometry.
 It is at an offset

-.I LABELOFFSET
+.Dv LABELOFFSET

 from the beginning of the sector, to allow room for the initial bootstrap.
 The disk sector containing the label is normally made read-only
 so that it is not accidentally overwritten by pack-to-pack copies
 or swap operations;
 from the beginning of the sector, to allow room for the initial bootstrap.
 The disk sector containing the label is normally made read-only
 so that it is not accidentally overwritten by pack-to-pack copies
 or swap operations;

-the DIOCWLABEL
-.IR ioctl ,
+the
+.Dv DIOCWLABEL
+.Xr ioctl 2 ,

 which is done as needed by the
 which is done as needed by the

-.IR disklabel (8)
+.Xr disklabel

 program.
 program.

-.PP
-A copy of the in-core label for a disk can be obtained with the DIOCGDINFO
-.IR ioctl ;
+.Pp
+A copy of the in-core label for a disk can be obtained with the
+.Dv DIOCGDINFO
+.Xr ioctl ;

 this works with a file descriptor for a block or character (``raw'') device
 for any partition of the disk.
 this works with a file descriptor for a block or character (``raw'') device
 for any partition of the disk.

-The in-core copy of the label is set by the DIOCSDINFO
-.IR ioctl .
+The in-core copy of the label is set by the 
+.Dv DIOCSDINFO
+.Xr ioctl .

 The offset of a partition cannot generally be changed while it is open,
 nor can it be made smaller while it is open.
 One exception is that any change is allowed if no label was found
 on the disk, and the driver was able to construct only a skeletal label
 without partition information.
 The offset of a partition cannot generally be changed while it is open,
 nor can it be made smaller while it is open.
 One exception is that any change is allowed if no label was found
 on the disk, and the driver was able to construct only a skeletal label
 without partition information.

-Finally, the DIOCWDINFO
-.I ioctl
+Finally, the 
+.Dv DIOCWDINFO
+.Xr ioctl

 operation sets the in-core label and then updates the on-disk label;
 there must be an existing label on the disk for this operation to succeed.
 Thus, the initial label for a disk or disk pack must be installed
 by writing to the raw disk.
 All of these operations are normally done using
 operation sets the in-core label and then updates the on-disk label;
 there must be an existing label on the disk for this operation to succeed.
 Thus, the initial label for a disk or disk pack must be installed
 by writing to the raw disk.
 All of these operations are normally done using

-.IR disklabel (8).
-.PP
+.Xr disklabel .
+.Pp

 The format of the disk label, as specified in
 The format of the disk label, as specified in

-.RI < sys/disklabel.h >,
+.Aw Pa sys/disklabel.h ,

 is
 is

-.nf
-.DT
+.Bd -literal

 /*
 /*

- * Disk description table, see disktab(5)
- */
+* Disk description table, see disktab(5)
+*/

 #define        DISKTAB         "/etc/disktab"
 
 /*
 #define        DISKTAB         "/etc/disktab"
 
 /*

- * Each disk has a label which includes information about the hardware
- * disk geometry, filesystem partitions, and drive specific information.
- * The label is in block 0 or 1, possibly offset from the beginning
- * to leave room for a bootstrap, etc.
- */
-.ta \w'#define  'u +\w'MAXPARTITIONS  'u +\w'((u_long) 0x82564557)  'u
+* Each disk has a label which includes information about the hardware
+* disk geometry, filesystem partitions, and drive specific information.
+* The label is in block 0 or 1, possibly offset from the beginning
+* to leave room for a bootstrap, etc.
+*/
+

 #define        LABELSECTOR     0       /* sector containing label */
 #define LABELOFFSET    64      /* offset of label in sector */
 #define DISKMAGIC      ((u_long) 0x82564557)   /* The disk magic number */
 #define        LABELSECTOR     0       /* sector containing label */
 #define LABELOFFSET    64      /* offset of label in sector */
 #define DISKMAGIC      ((u_long) 0x82564557)   /* The disk magic number */


@@ -93,8 +124,6 @@ is
 #define        MAXPARTITIONS   8
 #endif
 
 #define        MAXPARTITIONS   8
 #endif
 

-
-.ta \w'struct  'u +\w'u_long  'u +\w'd_packname[16]  'u

 #ifndef LOCORE
 struct disklabel {
        u_long  d_magic;        /* the magic number */
 #ifndef LOCORE
 struct disklabel {
        u_long  d_magic;        /* the magic number */


@@ -102,17 +131,17 @@ struct disklabel {
        short   d_subtype;      /* controller/d_type specific */
        char    d_typename[16]; /* type name, e.g. "eagle" */
        /* 
        short   d_subtype;      /* controller/d_type specific */
        char    d_typename[16]; /* type name, e.g. "eagle" */
        /* 

-        * d_packname contains the pack identifier and is returned when
-        * the disklabel is read off the disk or in-core copy.
-        * d_boot0 and d_boot1 are the (optional) names of the
-        * primary (block 0) and secondary (block 1-15) bootstraps
-        * as found in /usr/mdec.  These are returned when using
-        * getdiskbyname(3) to retrieve the values from /etc/disktab.
-        */
+       * d_packname contains the pack identifier and is returned when
+       * the disklabel is read off the disk or in-core copy.
+       * d_boot0 and d_boot1 are the (optional) names of the
+       * primary (block 0) and secondary (block 1-15) bootstraps
+       * as found in /usr/mdec.  These are returned when using
+       * getdiskbyname(3)
+       to retrieve the values from /etc/disktab.
+       */

 #if defined(KERNEL) || defined(STANDALONE)
        char    d_packname[16];         /* pack identifier */ 
 #else
 #if defined(KERNEL) || defined(STANDALONE)
        char    d_packname[16];         /* pack identifier */ 
 #else

-.ta \w'struct  'u +\w'struct  'u +\w'struct {  'u +\w'un_d_packname[16]  'u

        union {
                char    un_d_packname[16];      /* pack identifier */ 
                struct {
        union {
                char    un_d_packname[16];      /* pack identifier */ 
                struct {


@@ -120,13 +149,13 @@ struct disklabel {
                        char *un_d_boot1;       /* secondary bootstrap name */
                } un_b; 
        } d_un; 
                        char *un_d_boot1;       /* secondary bootstrap name */
                } un_b; 
        } d_un; 

-.ta \w'#define  'u +\w'd_packname  'u
+

 #define d_packname     d_un.un_d_packname
 #define d_boot0                d_un.un_b.un_d_boot0
 #define d_boot1                d_un.un_b.un_d_boot1
 #endif /* ! KERNEL or STANDALONE */
 #define d_packname     d_un.un_d_packname
 #define d_boot0                d_un.un_b.un_d_boot0
 #define d_boot1                d_un.un_b.un_d_boot1
 #endif /* ! KERNEL or STANDALONE */

-.ta \w'struct  'u +\w'u_short  'u +\w'd_d_drivedata[NDDATA]  'u
-               /* disk geometry: */
+
+       /* disk geometry: */

        u_long  d_secsize;      /* # of bytes per sector */
        u_long  d_nsectors;     /* # of data sectors per track */
        u_long  d_ntracks;      /* # of tracks per cylinder */
        u_long  d_secsize;      /* # of bytes per sector */
        u_long  d_nsectors;     /* # of data sectors per track */
        u_long  d_ntracks;      /* # of tracks per cylinder */


@@ -134,36 +163,36 @@ struct disklabel {
        u_long  d_secpercyl;    /* # of data sectors per cylinder */
        u_long  d_secperunit;   /* # of data sectors per unit */
        /*
        u_long  d_secpercyl;    /* # of data sectors per cylinder */
        u_long  d_secperunit;   /* # of data sectors per unit */
        /*

-        * Spares (bad sector replacements) below
-        * are not counted in d_nsectors or d_secpercyl.
-        * Spare sectors are assumed to be physical sectors
-        * which occupy space at the end of each track and/or cylinder.
-        */
+       * Spares (bad sector replacements) below
+       * are not counted in d_nsectors or d_secpercyl.
+       * Spare sectors are assumed to be physical sectors
+       * which occupy space at the end of each track and/or cylinder.
+       */

        u_short d_sparespertrack;       /* # of spare sectors per track */
        u_short d_sparespercyl; /* # of spare sectors per cylinder */
        /*
        u_short d_sparespertrack;       /* # of spare sectors per track */
        u_short d_sparespercyl; /* # of spare sectors per cylinder */
        /*

-        * Alternate cylinders include maintenance, replacement,
-        * configuration description areas, etc.
-        */
+       * Alternate cylinders include maintenance, replacement,
+       * configuration description areas, etc.
+       */

        u_long  d_acylinders;   /* # of alt. cylinders per unit */
 
                /* hardware characteristics: */
        /*
        u_long  d_acylinders;   /* # of alt. cylinders per unit */
 
                /* hardware characteristics: */
        /*

-        * d_interleave, d_trackskew and d_cylskew describe perturbations
-        * in the media format used to compensate for a slow controller.
-        * Interleave is physical sector interleave, set up by the formatter
-        * or controller when formatting.  When interleaving is in use,
-        * logically adjacent sectors are not physically contiguous,
-        * but instead are separated by some number of sectors.
-        * It is specified as the ratio of physical sectors traversed
-        * per logical sector.  Thus an interleave of 1:1 implies contiguous
-        * layout, while 2:1 implies that logical sector 0 is separated
-        * by one sector from logical sector 1.
-        * d_trackskew is the offset of sector 0 on track N
-        * relative to sector 0 on track N-1 on the same cylinder.
-        * Finally, d_cylskew is the offset of sector 0 on cylinder N
-        * relative to sector 0 on cylinder N-1.
-        */
+       * d_interleave, d_trackskew and d_cylskew describe perturbations
+       * in the media format used to compensate for a slow controller.
+       * Interleave is physical sector interleave, set up by the formatter
+       * or controller when formatting.  When interleaving is in use,
+       * logically adjacent sectors are not physically contiguous,
+       * but instead are separated by some number of sectors.
+       * It is specified as the ratio of physical sectors traversed
+       * per logical sector.  Thus an interleave of 1:1 implies contiguous
+       * layout, while 2:1 implies that logical sector 0 is separated
+       * by one sector from logical sector 1.
+       * d_trackskew is the offset of sector 0 on track N
+       * relative to sector 0 on track N-1 on the same cylinder.
+       * Finally, d_cylskew is the offset of sector 0 on cylinder N
+       * relative to sector 0 on cylinder N-1.
+       */

        u_short d_rpm;  /* rotational speed */
        u_short d_interleave;   /* hardware sector interleave */
        u_short d_trackskew;    /* sector 0 skew, per track */
        u_short d_rpm;  /* rotational speed */
        u_short d_interleave;   /* hardware sector interleave */
        u_short d_trackskew;    /* sector 0 skew, per track */


@@ -178,24 +207,21 @@ struct disklabel {
        u_long  d_magic2;       /* the magic number (again) */
        u_short d_checksum;     /* xor of data incl. partitions */
 
        u_long  d_magic2;       /* the magic number (again) */
        u_short d_checksum;     /* xor of data incl. partitions */
 

-                       /* filesystem and partition information: */
+       /* filesystem and partition information: */

        u_short d_npartitions;  /* number of partitions in following */
        u_long  d_bbsize;       /* size of boot area at sn0, bytes */
        u_long  d_sbsize;       /* max size of fs superblock, bytes */
        struct  partition {     /* the partition table */
        u_short d_npartitions;  /* number of partitions in following */
        u_long  d_bbsize;       /* size of boot area at sn0, bytes */
        u_long  d_sbsize;       /* max size of fs superblock, bytes */
        struct  partition {     /* the partition table */

-.ta \w'struct  'u +\w'struct  'u +\w'u_short  'u +\w'd_d_drivedata[NDDATA]  'u

                u_long  p_size; /* number of sectors in partition */
                u_long  p_offset;       /* starting sector */
                u_long  p_fsize;        /* filesystem basic fragment size */
                u_char  p_fstype;       /* filesystem type, see below */
                u_char  p_frag; /* filesystem fragments per block */
                u_short p_cpg;  /* filesystem cylinders per group */
                u_long  p_size; /* number of sectors in partition */
                u_long  p_offset;       /* starting sector */
                u_long  p_fsize;        /* filesystem basic fragment size */
                u_char  p_fstype;       /* filesystem type, see below */
                u_char  p_frag; /* filesystem fragments per block */
                u_short p_cpg;  /* filesystem cylinders per group */

-.ta \w'struct  'u +\w'u_short  'u +\w'd_d_drivedata[NDDATA]  'u

        } d_partitions[MAXPARTITIONS];  /* actually may be more */
 };
 
 /* d_type values: */
        } d_partitions[MAXPARTITIONS];  /* actually may be more */
 };
 
 /* d_type values: */

-.ta \w'#define  'u +\w'DTYPE_FLOPPY  'u +\w'0x10  'u

 #define        DTYPE_SMD       1       /* SMD, XSMD; VAX hp/up */
 #define        DTYPE_MSCP      2       /* MSCP */
 #define        DTYPE_DEC       3       /* other DEC (rk, rl) */
 #define        DTYPE_SMD       1       /* SMD, XSMD; VAX hp/up */
 #define        DTYPE_MSCP      2       /* MSCP */
 #define        DTYPE_DEC       3       /* other DEC (rk, rl) */


@@ -223,17 +249,17 @@ static char *dktypenames[] = {
 #endif
 
 /*
 #endif
 
 /*

- * Filesystem type and version.
- * Used to interpret other filesystem-specific
- * per-partition information.
- */
+* Filesystem type and version.
+* Used to interpret other filesystem-specific
+* per-partition information.
+*/

 #define        FS_UNUSED       0       /* unused */
 #define        FS_UNUSED       0       /* unused */

-#define        FS_SWAP 1       /* swap */
-#define        FS_V6   2       /* Sixth Edition */
-#define        FS_V7   3       /* Seventh Edition */
-#define        FS_SYSV 4       /* System V */
-#define        FS_V71K 5       /* V7 with 1K blocks (4.1, 2.9) */
-#define        FS_V8   6       /* Eighth Edition, 4K blocks */
+#define        FS_SWAP         1       /* swap */
+#define        FS_V6           2       /* Sixth Edition */
+#define        FS_V7           3       /* Seventh Edition */
+#define        FS_SYSV         4       /* System V */
+#define        FS_V71K         5       /* V7 with 1K blocks (4.1, 2.9) */
+#define        FS_V8           6       /* Eighth Edition, 4K blocks */

 #define        FS_BSDFFS       7       /* 4.2BSD fast file system */
 
 #ifdef DKTYPENAMES
 #define        FS_BSDFFS       7       /* 4.2BSD fast file system */
 
 #ifdef DKTYPENAMES


@@ -252,39 +278,38 @@ static char *fstypenames[] = {
 #endif
 
 /*
 #endif
 
 /*

- * flags shared by various drives:
- */
+* flags shared by various drives:
+*/

 #define        D_REMOVABLE     0x01    /* removable media */
 #define        D_REMOVABLE     0x01    /* removable media */

-#define        D_ECC   0x02    /* supports ECC */
+#define        D_ECC           0x02    /* supports ECC */

 #define        D_BADSECT       0x04    /* supports bad sector forw. */
 #define        D_RAMDISK       0x08    /* disk emulator */
 #define        D_BADSECT       0x04    /* supports bad sector forw. */
 #define        D_RAMDISK       0x08    /* disk emulator */

-#define        D_CHAIN 0x10    /* can do back-back transfers */
+#define        D_CHAIN         0x10    /* can do back-back transfers */

 
 /*
 
 /*

- * Drive data for SMD.
- */
-.ta \w'#define  'u +\w'DTYPE_FLOPPY  'u +\w'd_drivedata[1]  'u
+* Drive data for SMD.
+*/
+

 #define        d_smdflags      d_drivedata[0]
 #define        d_smdflags      d_drivedata[0]

-#define        D_SSE   0x1     /* supports skip sectoring */
+#define        D_SSE           0x1     /* supports skip sectoring */

 #define        d_mindist       d_drivedata[1]
 #define        d_maxdist       d_drivedata[2]
 #define        d_mindist       d_drivedata[1]
 #define        d_maxdist       d_drivedata[2]

-#define        d_sdist d_drivedata[3]
+#define        d_sdist         d_drivedata[3]

 
 /*
 
 /*

- * Drive data for ST506.
- */
+* Drive data for ST506.
+*/

 #define d_precompcyl   d_drivedata[0]
 #define d_precompcyl   d_drivedata[0]

-#define d_gap3 d_drivedata[1]  /* used only when formatting */
+#define d_gap3         d_drivedata[1]  /* used only when formatting */

 
 #ifndef LOCORE
 /*
 
 #ifndef LOCORE
 /*

- * Structure used to perform a format
- * or other raw operation, returning data
- * and/or register values.
- * Register identification and format
- * are device- and driver-dependent.
- */
-.ta \w'struct  'u +\w'daddr_t  'u +\w'df_startblk  'u
+* Structure used to perform a format
+* or other raw operation, returning data
+* and/or register values.
+* Register identification and format
+* are device- and driver-dependent.
+*/

 struct format_op {
        char    *df_buf;
        int     df_count;       /* value-result */
 struct format_op {
        char    *df_buf;
        int     df_count;       /* value-result */


@@ -293,34 +318,40 @@ struct format_op {
 };
 
 /*
 };
 
 /*

- * Structure used internally to retrieve
- * information about a partition on a disk.
- */
+* Structure used internally to retrieve
+* information about a partition on a disk.
+*/

 struct partinfo {
        struct  disklabel *disklab;
        struct  partition *part;
 };
 
 /*
 struct partinfo {
        struct  disklabel *disklab;
        struct  partition *part;
 };
 
 /*

- * Disk-specific ioctls.
- */
-               /* get and set disklabel; DIOCGPART used internally */
-.ta \w'#define  'u +\w'DIOCSRETRIES  'u +\w'_IOW( d , 103, struct disklabel)  'u
-#define DIOCGDINFO     _IOR('d', 101, struct disklabel)        /* get */
-#define DIOCSDINFO     _IOW('d', 102, struct disklabel)        /* set */
-#define DIOCWDINFO     _IOW('d', 103, struct disklabel)        /* set, update disk */
-#define DIOCGPART      _IOW('d', 104, struct partinfo) /* get partition */
+* Disk-specific ioctls.
+*/
+       /* get and set disklabel; DIOCGPART used internally */
+#define DIOCGDINFO   _IOR('d', 101, struct disklabel) /* get */
+#define DIOCSDINFO   _IOW('d', 102, struct disklabel) /* set */
+#define DIOCWDINFO   _IOW('d', 103, struct disklabel) /* set, update disk */
+#define DIOCGPART    _IOW('d', 104, struct partinfo)  /* get partition */

 
 /* do format operation, read or write */
 #define DIOCRFORMAT    _IOWR('d', 105, struct format_op)
 #define DIOCWFORMAT    _IOWR('d', 106, struct format_op)
 
 
 /* do format operation, read or write */
 #define DIOCRFORMAT    _IOWR('d', 105, struct format_op)
 #define DIOCWFORMAT    _IOWR('d', 106, struct format_op)
 

-#define DIOCSSTEP      _IOW('d', 107, int)     /* set step rate */
-#define DIOCSRETRIES   _IOW('d', 108, int)     /* set # of retries */
-#define DIOCWLABEL     _IOW('d', 109, int)     /* write en/disable label */
+#define DIOCSSTEP      _IOW('d', 107, int) /* set step rate */
+#define DIOCSRETRIES   _IOW('d', 108, int) /* set # of retries */
+#define DIOCWLABEL     _IOW('d', 109, int) /* write en/disable label */

 
 

-#define DIOCSBAD       _IOW('d', 110, struct dkbad)    /* set kernel dkbad */
+#define DIOCSBAD       _IOW('d', 110, struct dkbad) /* set kernel dkbad */

 
 #endif LOCORE
 
 #endif LOCORE

-.SH "SEE ALSO"
-disktab(5), disklabel(8)
+.Ed
+.Sh SEE ALSO
+.Xr disktab 5 ,
+.Xr disklabel 8
+.Sh HISTORY
+The
+.Nm
+file format is
+.Ud .