Parameters

volume-name

   Specifies the volume on which the recovery unit journals will be
   located, using one of the following keywords:

   o  DEVICE=device_name specifies a device name or logical name.

   o  LABEL=volume-label specifies a volume label.

   By default, recovery unit journals are created temporarily in the
   [SYSJNL] directory on the same volume as the file that is being
   journaled. (If such a directory does not exist, RMS journaling
   creates it automatically.) You can change the device on which the
   recovery unit journals are created by using either the DEVICE or
   LABEL keyword.

   Use the DEVICE keyword to specify the location of recovery unit
   journals using a device name or a logical name. Use the LABEL
   keyword to specify the location of recovery unit journals using a
   volume label. You can only use one of these two keywords (LABEL
   or DEVICE) to specify the recovery unit journal location. In
   either case, only the volume label is actually stored with the
   file.

   At run time, RMS attempts to translate the logical name
   DISK$volume_label when creating a recovery unit journal. This
   is the default logical name created by the Mount Utility when you
   mount the disk using the /SYSTEM or /CLUSTER qualifier. If you do
   not mount the disk using the /SYSTEM or /CLUSTER qualifier, you
   must define the logical name DISK$volume_label using the DEFINE
   command with the /SYSTEM and /EXECUTIVE_MODE qualifiers. You
   must have the SYSNAM (system logical name) or the SYSPRV (system
   privilege) privilege to use the /SYSTEM qualifier.

                                  NOTE

      The logical name DISK$volume_label can point to any
      disk device on the system that is mounted and has for
      its volume label an executive-mode logical name in the
      form DISK$volume_label with the concealed and terminal
      attributes.


data-filespec[,...]

   Specifies the file that is to be marked for recovery unit
   journaling. If a data file has been marked for recovery unit
   journaling with this command, DECdtm transaction services
   ($START_TRANS, $END_TRANS, and $ABORT_TRANS) must be used by
   an application program to define transactions whenever data in
   this file is modified.

   If you specify more than one file, separate the file
   specifications with commas. The asterisk (*) and the percent
   sign (%) wildcard characters are allowed. The file specification
   cannot include a node name, since the SET FILE command is not
   valid for network access.