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.TH PARTFS 8
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.SH NAME
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partfs \- serve file, with partitions
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.SH SYNOPSIS
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.B disk/partfs
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[
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.B -Dr
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] [
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.B -d
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.I diskname
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] [
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.B -m
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.I mtpt
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] [
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.B -p
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.I 9load-parts
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] [
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.B -s
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.I srvname
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]
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.I diskimage
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.SH DESCRIPTION
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.I Partfs
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presents the file
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.I diskimage
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in the manner of
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.IR sd (3)
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on
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.IB mtpt / diskname
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(default
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.BR /dev/sdXX ).
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Changes made to the disk are written through to
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.I diskimage
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unless the
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.B -r
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option is given.
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.PP
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When setting disk geometry with the
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.B geometry
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control message,
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the arguments are
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sectors and sector size.
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.PP
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The
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.B -m
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option causes
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.I partfs
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to mount its synthetic file system at
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.I mtpt
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instead of
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.BR /dev .
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.PP
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The
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.B -p
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option causes
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.I partfs
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to treat
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.I 9load-parts
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as a partition environment variable constructed by
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.I 9load
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(see
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.IR 9boot (8))
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and adds the defined partitions.
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This is used primarily by
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.IR boot (8)
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to assist booting from USB disks.
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.PP
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The
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.B -s
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option causes
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.I partfs
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to post its 9P service at
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.BI /srv/ service \fR.
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.SH EXAMPLES
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Partition a USB flash device:
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.IP
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.EX
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disk/partfs /dev/sdU0.0/data
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disk/mbr -m /386/mbr /dev/sdXX/data
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disk/fdisk -baw /dev/sdXX/data
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disk/prep /dev/sdXX/plan9
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.EE
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.SH SOURCE
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.B /sys/src/cmd/disk/partfs.c
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.SH SEE ALSO
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.IR fs (3),
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.IR sd (3),
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.IR disksim (8),
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.IR prep (8)