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CCDCONFIG(8)            OpenBSD System Manager's Manual           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 [-M core] [-N system] [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.  Only root can dump the configuration
             (unless ccdconfig is made setgid kmem).

     -M core
             Extract values associated with the name list from core instead of
             the default /dev/mem.

     -N system
             Extract the name list from system instead of the running kernel.

     -u      Unconfigure a ccd.

     -U      Unconfigure all ccd devices listed in 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.  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:

           CCDF_SWAP      0x01      Interleave should be dmmax.
           CCDF_UNIFORM   0x02      Use uniform interleave.
           CCDF_MIRROR    0x04      Enable data mirroring.
           CCDF_OLD       0x08      Use old unoptimized I/O protocol.

     The format in the configuration file appears exactly as if it were en-
     tered on the command line.  Note that on the command line and in the con-
     figuration file, the flags argument is optional.

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

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

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

SEE ALSO
     ccd(4), rc(8)

HISTORY
     The ccdconfig command first appeared in NetBSD 1.0A.

OpenBSD 3.6                      July 17, 1995                               2