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.Dd February 20, 2026
.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 \&...
.
.Nm
.Fl C
.Op Fl v
.Op Fl f Ar config_file
.
.Nm
.Fl u
.Op Fl v
.Ar ccd \&...
.
.Nm
.Fl U
.Op Fl v
.Op Fl f Ar config_file
.
.Nm
.Fl g
.Op Fl vWw
.Op Ar ccd \&...
.
.Nm
.Fl p
.Op Fl hsVvWw
.Op Ar ccd \&...
.
.Sh DESCRIPTION
.Nm
is used to dynamically configure and unconfigure concatenated disk
devices, or ccds.
For more information see
.Xr ccd 4 .
.Pp
The options are as follows:
.Bl -tag -width Fl
.It Fl c
Configure a ccd.
The ccd to configure is given as
.Ar ccd ,
it is usually the name of a
.Xr ccd 4
device relative to
.Pa /dev .
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 h
With
.Fl p
show the size as a number of bytes, rather than sectors,
and interpreted by
.Xr humanize_number 3 .
.It Fl s
With
.Fl p
show the flags in string form, rather than as a number.
.It Fl u
Unconfigure one, or more, ccds.
.It Fl U
Unconfigure all ccd devices listed in the ccd configuration file.
.It Fl V
Identical to
.Fl v ,
except when used with
.Fl p
a more ornate layout is used.
.It Fl v
Causes
.Nm
to be verbose.
When used with
.Fl c
or
.Fl C
information about the ccd being configured is printed.
When used with
.Fl u
or
.Fl U
a message indicating that the ccd has been unconfigured is printed.
When used with
.Fl g
or
.Fl p
a header line is printed before the output.
In the case of
.Fl g
the header is in a format that will be treated as a comment
if included in a ccd configuration file.
.It Fl W
With
.Fl g
or
.Fl p
when a component device of a ccd is a wedge with a label,
print the label in
.Li NAME=label
format instead of the wedge device name.
Wedge names in this format are always accepted as a
.Ar dev
.Pq component device
argument.
.It Fl w
The same as
.Fl W
except wedge labels which contain any of
.Ql \~
.Pq space ,
.Ql \et
.Pq tab ,
or
.Ql \en
.Pq newline
are treated as if no label exists; the wedge device name is used.
.El
.Pp
See the
.Sx ENVIRONMENT
section below for some extra options.
.Pp
A ccd is described on the command line and in the ccd configuration
file by the name of the ccd
.Po
the string
.Dq Cm ccd
with a decimal unit number appended
.Pc ,
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
.Sq Li none .
The flags are as follows:
.Bl -column -offset indent ".Dv CCDF_UNIFORM" ".Sy Numeric"
.It Sy Symbolic Ta Sy Numeric Ta Sy Comment.
.It Dv CCDF_UNIFORM Ta Li 0x02 Ta Use uniform interleave.
The size of all components is clamped to that of the smallest component.
.It Dv CCDF_NOLABEL Ta Li 0x04 Ta Ignore raw disklabel.
Useful when creating a new ccd.
.El
.Pp
The aliases
.Sq Li uniform
and
.Sq Li nolabel
may be used instead of the formal names, and are printed when
.Nm
.Fl ps
is requested.
In all cases when considering input names of flags, character case is ignored.
.Ss /etc/ccd.conf
The file
.Pa /etc/ccd.conf
is used to configure
.Nm
if
.Fl C
or
.Fl U
is used without
.Fl f .
Each line of the configuration file contains arguments as per the
.Fl c
argument:
.Ar ccd Ar ileave Oo Ar flags Oc Ar dev \&...
.Pp
A
.Ql #
is a comment, and everything to end of line is ignored.
A
.Ql \e
at the end of a line indicates that the next line should be concatenated
with the current.
A
.Ql \e
preceding any character
.Pq 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 ENVIRONMENT
The name
.Ev CCDCONFIG
in the environment passed to
.Nm ,
can be set to a string containing of one or more of the
characters:
.Ql h
.Ql s
.Ql V
.Ql v
.Ql W
and
.Ql w ,
to cause the appropriate option to default to on.
Any other characters in the value of
.Ev CCDCONFIG
are ignored.
To allow these defaults to be overridden for a particular instance of
.Nm ,
additional options,
not shown in the
.Sx SYNOPSIS ,
listed above, or output in a usage message,
can be used on the command line to override settings from
.Ev CCDCONFIG .
.Fl D
will disable
.Ql w
and
.Ql W ,
.Fl n
will disable
.Ql h ,
.Fl q
will disable
.Ql v
and
.Ql V ,
and
.Fl S
will disable
.Ql s .
In addition the options in each of the option pairs
.Fl W
and
.Fl w ,
and
.Fl V
and
.Fl v ,
are mutually exclusive, using one on the command line will
override an earlier use of the other, or use of the other
character in
.Ev CCDCONFIG .
.Sh FILES
.Bl -tag -width Pa -compact
.It Pa /etc/ccd.conf
default ccd configuration file.
.El
.Sh EXAMPLES
The following command, executed from the command line, would configure
.Pa ccd0
with 4 components
.Po
.Pa /dev/sd2e ,
.Pa /dev/sd3e ,
.Pa /dev/sd4e ,
.Pa /dev/sd5e
.Pc ,
and an interleave factor of 32 blocks.
.Pp
.Dl ccdconfig ccd0 32 0 /dev/sd2e /dev/sd3e /dev/sd4e /dev/sd5e
.Pp
.Pp
An example
.Pa /etc/ccd.conf :
.Bd -literal -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 humanize_number 3 ,
.Xr ccd 4 ,
.Xr ccd.conf 5 ,
.Xr rc 8
.Sh HISTORY
The
.Nm
command first appeared in
.Nx 1.1 .
The
.Fl W
.Pq and Fl w
option,
and the
.Fl p
option, and its related options,
first appeared in
.Nx 12.0 .

.