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