CCDCONFIG(8)

NAME
ccdconfig - configuration utility for the concatenated disk driver

SYNOPSIS
ccdconfig [-cv] ccd ileave [flags] dev [...]
ccdconfig -C [-v] [-f config_file]
ccdconfig -u [-v] ccd [...]
ccdconfig -U [-v] [-f config_file]
ccdconfig -g [ ccd [...]]

DESCRIPTION
ccdconfig is used to dynamically configure and unconfigure concatenated disk devices, or ccds. For more information about the ccd, see ccd(4).

The options are as follows:

-c  Configure a ccd. This is the default behavior of ccdconfig.

-C  Configure all ccd devices listed in the ccd configuration file.

-f config_file
    When configuring or unconfiguring all devices, read the file config_file instead of the default /etc/ccd.conf.

-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.

-u  Unconfigure a ccd.

-U  Unconfigure all ccd devices listed the ccd configuration file.

-v  Causes ccdconfig to be verbose.

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 “none”. The flags are as follows:
Symbolic | Numeric | Comment
CCDF_UNIFORM 0x02 Use uniform interleave.
The size of all components is clamped to that of the smallest component.
CCDF_NOLABEL 0x04 Ignore raw disklabel.
Useful when creating a new ccd.

  /etc/ccd.conf
The file /etc/ccd.conf is used to configure ccdconfig if -C or -U is used. Each line of the configuration file contains arguments as per the -c argument: ccd ileave [flags] dev [...]

A ‘#’ is a comment, and everything to end of line is ignored. A ‘\’ at the end of a line indicates that the next line should be concatenated with the current. A ‘\’ preceding any character (other than the end of line) prevents that character's special meaning from taking effect.

See EXAMPLES for an example of /etc/ccd.conf.

FILES
/etc/ccd.conf - default ccd configuration file.

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.

    # ccdconfig ccd0 32 0 /dev/sd2e /dev/sd3e /dev/sd4e /dev/sd5e

An example /etc/ccd.conf:

    #
    # /etc/ccd.conf
    # Configuration file for concatenated disk devices
    #

    # ccd           ileave  flags   component devices
    ccd0            16      none    /dev/sd2e /dev/sd3e

SEE ALSO
ccd(4), ccd.conf(5), rc(8)

HISTORY
The ccdconfig command first appeared in NetBSD 1.1.