# man vxmirror
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Maintenance Commands                                 vxmirror(1M)

NAME
     vxmirror - mirror volumes on a disk or control default  mir-
     roring

SYNOPSIS
     /etc/vx/bin/vxmirror [-g diskgroup ] [-d yes|no ] [-t  task-
     tag ] medianame [new_medianame...]

     /etc/vx/bin/vxmirror [-g diskgroup ] [-d yes|no ] [-t  task-
     tag ] -a [new_medianame...]

     /etc/vx/bin/vxmirror [-g diskgroup ] [-d yes|no]

     /etc/vx/bin/vxmirror [-g diskgroup] -D

DESCRIPTION
     The vxmirror command provides a mechanism to mirror the con-
     tents  of  a  specified  disk,  to  mirror all currently un-
     mirrored volumes in the specified disk group, or  to  change
     or  display the current defaults for mirroring.  All volumes
     that have only a single plex (mirror copy), are mirrored  by
     adding an additional plex.

     Volumes containing subdisks that reside  on  more  than  one
     disk are not mirrored by vxmirror.

     vxmirror is generally called from the vxdiskadm  menus.   It
     is  not an interactive command, and after it is called, con-
     tinues until completion of the operation or until a  failure
     is detected.

     Note:  Generating mirror copies of volumes can take  a  con-
     siderable time to complete.

     Mirroring volumes from the boot disk produces  a  disk  that
     can be used as an alternate boot disk.  This is done by cal-
     ling the vxrootmir  command.  This  mirrors  root  and  swap
     volumes.  If usr and var are also volumes, they too are mir-
     rored even though they may not be on the same disk.

     In the first listed form of this  command,  the  disk  media
     name is supplied on the command line to vxmirror.  That name
     is assumed to be the only disk from which volumes  are  mir-
     rored.   In  the  case of mirroring volumes from a specified
     disk, only simple single-subdisk volumes are mirrored.

     In the  first  and  second  listed  forms  of  the  command,
     new_medianame...   identifies  a new disk media name (or set
     of names).  The mirroring operation uses these names as tar-
     gets  on which to allocate the mirrors.  An error results if
     the same disk is specified for both the  source  and  target
     disk and if no other viable targets are supplied.

VxVM 3.0            Last change: 11 Dec 1998                    1

Maintenance Commands                                 vxmirror(1M)

OPTIONS
     -a        Mirrors all existing  volumes  for  the  specified
               disk group.

     -d yes | no
               Changes the default for  subsequent  volume  crea-
               tion,  depending  on the option argument.  If yes,
               then all subsequent volumes created  automatically
               become mirrored volumes.  If no, then mirroring is
               turned off for future volumes created.

     -D        Displays current default status for mirroring.

     -g diskgroup
               Limits operation of the command to the given  disk
               group, as specified by disk group ID or disk group
               name.  The medianame operands are evaluated  rela-
               tive to the given disk group.  If no disk group is
               supplied, then rootdg is assumed.

     -t tasktag
               Specifies using a tasktag as the tag for any tasks
               created to perform the mirror operations.

EXAMPLES
     The following command mirrors the disk disk01 to any  avail-
     able space on any available disk.  Subsequent calls to vxas-
     sist mirror created volumes by default.

          vxmirror -d yes disk01

     This command displays the current status of default  mirror-
     ing.   It  outputs  the string yes if mirroring is currently
     enabled, or no if mirroring is not enabled.

          vxmirror -D

     This command mirrors any volumes on disk02 to disk03.

          vxmirror disk02 disk03

FILES
     /etc/default/vxassist         The defaults file for vxassist
                                   parameters.

SEE ALSO
     vxassist(1M),  vxdiskadm(1M),  vxintro(1M),   vxrootmir(1M),
     vxtask(1M)

VxVM 3.0            Last change: 11 Dec 1998                    2

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