223 lines
5.8 KiB
Groff
223 lines
5.8 KiB
Groff
.TH PDISK 8 "16 May 2000" "LinuxPPC" "Linux Programmer's Manual"
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.SH NAME
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pdisk \- Apple partition table editor for Linux
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.SH SYNOPSIS
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.B pdisk
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.B "[\-h|\--help]"
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.br
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.B pdisk
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.B "[\-i|\--interactive]"
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.br
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.B pdisk
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.B "[\-l|\--list [name ...]]"
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.br
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.B pdisk
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device ...
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.br
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.B pdisk
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.B "[\-v|\--version] [\-r|\--readonly] [\-abbr] [\--logical] [\-c|\--compute_size] [\-p|\--pname] [\-d|\--debug]"
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.SH DESCRIPTION
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.B pdisk
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is a menu driven program which partitions disks using the standard Apple
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disk partitioning scheme described in "Inside Macintosh: Devices".
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It does not support the intel/dos partitioning scheme supported by
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.BR fdisk .
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The
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.I device
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is usually one of the following:
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.nf
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.RS
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/dev/sda
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/dev/sdb
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/dev/sdc
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/dev/sdd
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/dev/sde
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/dev/sdf
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/dev/sdg
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/dev/hda
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/dev/hdb
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/dev/hdc
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/dev/hdd
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.RE
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.fi
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In standard Linux /dev/sda is the first hard disk on the SCSI bus (i.e. the
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one with the lowest id), /dev/sdb is the second hard disk, and so on.
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The
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.I partition
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is a
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.I device
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name followed by a partition number.
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The partition number is the index (starting from one) of the partition
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map entry in the partition map.
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For example,
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.B /dev/sda2
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is the partition described by the second entry in the partiton map on /dev/sda.
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.SH OPTIONS
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.TP
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.B \-v | \--version
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Prints version number of the
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.B pdisk
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program.
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.TP
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.B \-h | \--help
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Prints a rather lame set of help messages for the
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.B pdisk
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program.
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.TP
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.B \-i | \--interactive
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Causes
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.B pdisk
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to go into an interactive mode similar to the MacOS version of the program.
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.TP
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.B \-l | \--list
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If no
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.IR name s
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are present then lists the partition tables for
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.BR /dev/sda ,
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.BR /dev/sdb ,
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etc. ,
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.BR /dev/hda ,
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.BR /dev/hdb ,
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etc. , and
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.BR /dev/scd0 ,
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.BR /dev/scd1 ,
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etc..
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Otherwise, lists the partition tables for the specified
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.IR name s.
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.TP
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.B \-r | \--readonly
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Prevents
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.B pdisk
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from writing to the device.
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.TP
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.B \-c | \--compute_size
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Causes
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.B pdisk
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to always ignore the device size listed in the partition table
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and compute the device size by other means.
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.TP
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.B \-p | \--pname
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Since the default behaviour of
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.B pdisk
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is to show the Mac volume name, this flag forces
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.B pdisk
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to show the partition name instead.
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.TP
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.B \-d | \--debug
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Turns on debugging. Doesn't add that much output, but does add
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a new command 'x' to the editing commands that accesses an
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eclectic bunch of undocumented functionality.
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.SH "Editing Partition Tables"
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An argument which is simply the name of a
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.I device
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indicates that
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.B pdisk
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should edit the partition table of that device.
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The current top level editing commands are:
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.nf
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.RS
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h command help
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p print the partition table
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P (print ordered by base address)
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i initialize partition map
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s change size of partition map
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c create new partition (standard MkLinux type)
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C (create with type also specified)
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n (re)name a partition
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d delete a partition
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r reorder partition entry in map
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w write the partition table
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q quit editing (don't save changes)
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.RE
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.fi
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Commands which take arguments prompt for each argument in turn.
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You can also type any number of the arguments separated by spaces
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and those prompts will be skipped.
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The only exception to typeahead are the confirmation prompts on the
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.B i
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and
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.B w
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commands.
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The idea being that if we expect you to confirm the decision we
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shouldn't undermine that by allowing you to be precipitate about it.
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Partitions are always specified by their number,
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which the index of the partition entry in the partition map.
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Most of the commands will change the index numbers of all partitions
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after the affected partition.
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You are advised to print the table as frequently as necessary.
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Creating more than fifteen partitions is not advised.
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There is currently a bug in the some (all?) of the kernels which causes
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access to the whole disk fail if more than fifteen partitions are in the map.
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The
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.B c
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(create new partition) command is the only one with complicated arguments.
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The first argument is the base address (in blocks) of the partition.
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Besides a raw number, you can also specify a partition number followed
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by the letter 'p' to indicate that the first block of the new partition should
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be the same as the first block of that existing free space partition.
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The second argument is the length of the partition in blocks.
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This can be a raw number or can be a partition number followed by the
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letter 'p' to use the size of that partition or can be a number followed
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by 'k', 'm', or 'g' to indicate the size in kilobytes, megabytes, or gigabytes
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respectively.
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(These are powers of 1024, of course, not powers of 1000.)
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The last argument is the name of the partition.
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This can be a single word without quotes, or a string surrounded by
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single or double quotes.
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The type of the created partition is the correct type for MkLinux.
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The
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.B C
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command is identical to the
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.B c
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command, with the addition of a partition type argument after the
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other arguments.
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The
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.B n
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(name) command allows the name of a partition to be changed.
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Note that the various "Apple_Driver" partitions depend
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on the name field for proper functioning.
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I am not aware of any other partition types with this limitation.
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The
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.B r
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(reorder) command allows the index number of partitions to be changed.
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The index numbers are constrained to be a contiguous sequence.
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The
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.B i
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(initalize) command prompts for the size of the device.
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This was done to get around a bug in the kernel where it reports the wrong
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size for the device.
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The
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.B w
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(write) command does write the partition map out,
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but there is currently a bug in the interaction between MkLinux and Mach
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which causes the partition map not to be reinterpreted.
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In order to use the new partition map you must reboot.
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.SH BUGS
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Some people believe there should really be just one disk partitioning utility.
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.br
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.B pdisk
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should be able to create HFS partitions that work.
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.br
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Even more help should be available during user input.
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.SH "SEE ALSO"
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.BR fdisk (8),
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.BR mkswap (8),
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.BR mkfs (8)
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.SH AUTHOR
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Eryk Vershen
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