mdrc

PURPOSE

     Allows you to reinstall a user-created minidisk after you
     have reinstalled AIX.

SYNOPSIS
     mdrc

DESCRIPTION

     The mdrc  command provides  access to  user-created mini-
     disks.   You   should  run  this  command   if  you  have
     reinstalled the AIX  Operating System or if  you have had
     to   replace   the  /etc/system,   /etc/filesystems,   or
     /etc/ddi/cpmgr  files with  copies  that  do not  contain
     stanzas  describing  any user-installed  minidisks.   The
     system uses the information in these stanzas to configure
     the minidisks  at system startup, and  mdrc recreates the
     necessary stanzas.   Normally, mdrc uses the  backup copy
     of /etc/filesystems produced by the minidisk command when
     you use it to create a new minidisk.  This backup copy is
     named /u/filesystems.

     If  mdrc cannot  recreate  the original  /etc/filesystems
     stanza  for AIX  Operating System  minidisks, it  assigns
     attributes  of Auto Mount=no,  Read/Write Status=R/W, and
     Mount Directory=/tmp/directory/hdn  to the  minidisk.  In
     this case,  you should then  run the minidisk  command to
     change the attributes to the  values you want.  You might
     also need  to run the  mkdir command to create  the mount
     directory, if  you reinstalled  the entire  AIX Operating
     System.

     If minidisk has been created for use by the Personal Com-
     puter AT Coprocessor, mdrc will update the /etc/ddi/cpmgr
     file.   If you  have not  installed Personal  Computer AT
     Coprocessor Services  before running mdrc, it  creates an
     entry  in /etc/system,  but  displays  a warning  message
     because the /etc/ddi/cpmgr does  not exist.  You must run
     mdrc again after  you install the Coprocessor  to be able
     to use the Coprocessor minidisks.

     The mdrc  command does  not recognize external  disks and
     any minidisks  on them if  the disks are  not configured.
     To  configure an  external  disk and  its minidisks,  see
     "varyon."

     You must have  superuser authority or be a  member of the
     system group to run the mdrc command.

FLAG

     -h  hdisknum[, hdisknum] . . .
                 Specifies any disks that have been removed or
                 damaged and tells mdrc to remove the minidisk
                 configuration  entries for  these disks.   If
                 you do not specify  this flag and an external
                 disk is not  configured, mdrc ignores entries
                 in the  configuration files for  the external
                 disk's minidisks.

                 Note:  If you do not have any external disks,
                 you do not need to specify this flag.

FILES

     /etc/filesystems
     /etc/system
     /etc/ddi/cpmgr

RELATED INFORMATION

     The   following   commands:   "minidisks"   "mkdir"   and
     "varyon."

     The filesystems and system  files in AIX Operating System
     Technical Reference.