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Annotation of 43BSDReno/usr.sbin/diskpart/diskpart.8, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)diskpart.8  6.5 (Berkeley) 6/24/90
        !             6: .\"
        !             7: .TH DISKPART 8 "June 24, 1990"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: diskpart \- calculate default disk partition sizes
        !            11: .SH SYNOPSIS
        !            12: .B diskpart
        !            13: [
        !            14: .B \-p
        !            15: ] [
        !            16: .B \-d
        !            17: ] [
        !            18: .B \-s
        !            19: size
        !            20: ]
        !            21: disk-type
        !            22: .SH DESCRIPTION
        !            23: .I Diskpart
        !            24: is used to calculate the disk partition sizes based on the
        !            25: default rules used at Berkeley.  If the
        !            26: .B \-p
        !            27: option is supplied, tables suitable for inclusion in a device driver
        !            28: are produced.  If the
        !            29: .B \-d
        !            30: option is supplied, an entry suitable for inclusion in the disk
        !            31: description file
        !            32: .I /etc/disktab
        !            33: is generated; c.f.
        !            34: .IR disktab (5).
        !            35: On disks that use
        !            36: .IR bad144 \|-style
        !            37: bad-sector forwarding,
        !            38: space is normally left in the last partition on the disk
        !            39: for a bad sector forwarding table, although this space
        !            40: is not reflected in the tables produced.  The space reserved
        !            41: is one track for the replicated copies of the table and
        !            42: sufficient tracks to hold a pool of 126 sectors to which bad sectors
        !            43: are mapped.  For more information, see 
        !            44: .IR bad144 (8).
        !            45: The size of the disk may be limited with the
        !            46: .B \-s
        !            47: option, specifying the amount of the disk to be used.
        !            48: This option is intended for other controllers that reserve some space at the end
        !            49: of the disk for bad-sector replacements or other control areas,
        !            50: even if not a multiple of cylinders.
        !            51: .PP
        !            52: The disk partition sizes are based on the total amount of
        !            53: space on the disk as given in the table below (all values
        !            54: are supplied in units of sectors).  The `c' partition
        !            55: is, by convention, used to access the entire physical disk.
        !            56: The device driver tables include
        !            57: the space reserved for the bad sector forwarding table in the `c' partition;
        !            58: those used in the disktab and default formats exclude reserved tracks.
        !            59: In normal operation, either the `g' partition is used, or the
        !            60: `d', `e', and `f' partitions are used.  The `g' and `f' partitions
        !            61: are variable-sized, occupying whatever space remains after allocation
        !            62: of the fixed sized partitions.
        !            63: If the disk is smaller than 20 Megabytes, then
        !            64: .I diskpart
        !            65: aborts with the message ``disk too small, calculate by hand''.
        !            66: .in +0.5i
        !            67: .nf
        !            68: 
        !            69: .ta \w'Partition  'u +\w'20-60 MB  'u +\w'61-205 MB  'u +\w'206-355 MB  'u +\w'356+ MB'u
        !            70: Partition      20-60 MB        61-205 MB       206-355 MB      356+ MB
        !            71: a      15884   15884   15884   15884
        !            72: b      10032   33440   33440   66880
        !            73: d      15884   15884   15884   15884
        !            74: e      unused  55936   55936   307200
        !            75: h      unused  unused  291346  291346
        !            76: 
        !            77: .fi
        !            78: .in -0.5i
        !            79: .PP
        !            80: If an unknown disk type is specified, 
        !            81: .I diskpart
        !            82: will prompt for the required disk geometry information.
        !            83: .SH SEE ALSO
        !            84: disktab(5),
        !            85: bad144(8)
        !            86: .SH BUGS
        !            87: Most default partition sizes are based on historical artifacts
        !            88: (e.g. RP06), and may result in unsatisfactory layouts.
        !            89: .PP
        !            90: When using the \-d flag, alternate disk names are not included
        !            91: in the output.

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