.\"	$NetBSD: ccdconfig.8,v 1.27 2014/08/13 13:14:35 apb Exp $
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.Dd August 13, 2014
.Dt CCDCONFIG 8
.Os
.Sh NAME
.Nm ccdconfig
.Nd configuration utility for the concatenated disk driver
.Sh SYNOPSIS
.Nm
.Op Fl cv
.Ar ccd
.Ar ileave
.Op Ar flags
.Ar dev
.Op Ar ...
.Nm
.Fl C
.Op Fl v
.Op Fl f Ar config_file
.Nm
.Fl u
.Op Fl v
.Ar ccd
.Op Ar ...
.Nm
.Fl U
.Op Fl v
.Op Fl f Ar config_file
.Nm
.Fl g
.Oo
.Ar ccd Oo ...
.Oc
.Oc
.Sh DESCRIPTION
.Nm
is used to dynamically configure and unconfigure concatenated disk
devices, or ccds.
For more information about the ccd, see
.Xr ccd 4 .
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl c
Configure a ccd.
This is the default behavior of
.Nm .
.It Fl C
Configure all ccd devices listed in the ccd configuration file.
.It Fl f Ar config_file
When configuring or unconfiguring all devices, read the file
.Pa config_file
instead of the default
.Pa /etc/ccd.conf .
.It Fl g
Dump the current ccd configuration in a format suitable
for use as the ccd configuration file.
If no arguments are specified, every configured ccd is dumped.
Otherwise, the configuration of each listed ccd is dumped.
.It Fl u
Unconfigure a ccd.
.It Fl U
Unconfigure all ccd devices listed the ccd configuration file.
.It Fl v
Causes
.Nm
to be verbose.
.El
.Pp
A ccd is described on the command line and in the ccd configuration
file by the name of the ccd, the interleave factor,
the ccd configuration flags, and a list of one or more devices.
An interleave factor of 0 means that the devices are
concatenated serially, not interleaved.
The flags may be represented as a decimal number, a hexadecimal number,
a comma-separated list of strings, or the word
.Dq none .
The flags are as follows:
.Bl -column -offset indent "CCDF_UNIFORM " "0x02 "
.It Em "Symbolic	Numeric	Comment"
.It CCDF_UNIFORM	0x02	Use uniform interleave.
The size of all components is clamped to that of the smallest component.
.It CCDF_NOLABEL	0x04	Ignore raw disklabel.
Useful when creating a new ccd.
.El
.Ss /etc/ccd.conf
The file
.Pa /etc/ccd.conf
is used to configure
.Nm
if
.Fl C
or
.Fl U
is used.
Each line of the configuration file contains arguments as per the
.Fl c
argument:
.Ar ccd
.Ar ileave
.Op Ar flags
.Ar dev
.Op Ar ...
.Pp
A
.Sq #
is a comment, and everything to end of line is ignored.
A
.Sq \e
at the end of a line indicates that the next line should be concatenated
with the current.
A
.Sq \e
preceding any character (other than the end of line) prevents that
character's special meaning from taking effect.
.Pp
See
.Sx EXAMPLES
for an example of
.Pa /etc/ccd.conf .
.Sh FILES
/etc/ccd.conf - default ccd configuration file.
.Sh EXAMPLES
The following command, executed from the command line, would configure ccd0
with 4 components (/dev/sd2e, /dev/sd3e, /dev/sd4e, /dev/sd5e), and an
interleave factor of 32 blocks.
.Bd -unfilled -offset indent
# ccdconfig ccd0 32 0 /dev/sd2e /dev/sd3e /dev/sd4e /dev/sd5e
.Ed
.Pp
An example
.Pa /etc/ccd.conf :
.Bd -unfilled -offset indent
#
# /etc/ccd.conf
# Configuration file for concatenated disk devices
#
.Pp
# ccd           ileave  flags   component devices
ccd0            16      none    /dev/sd2e /dev/sd3e
.Ed
.Sh SEE ALSO
.Xr ccd 4 ,
.Xr ccd.conf 5 ,
.Xr rc 8
.Sh HISTORY
The
.Nm
command first appeared in
.Nx 1.1 .