Sun Java System Messaging Server 6.3 Administration Reference


The options for this command are:



-b blocking_factor

Everything written to the backup device is performed by blocks of the size 512xblocking_factor. The default is 20.


Date from which messages are to be backed up, expressed in YYYYMMDD [:HHMMSS]; for example, -d 19990501:131000 would backup messages stored from May 1, 1999 at 1:10 pm to the present. The default is to back up all the messages regardless of their dates.

-e encoding

Mailbox name encoding (example: IMAP_MODIFIED-UTF-7) 

-f device

Specifies the file name or device to which the backup is written. If device is ”-’, backup data is written to stdout.


Debug mode. The output is written in the default log file not to the stdout. For the stdout, one should use -v.


Ensures that all messages are backed up for a partial restore. Backs up every message multiple times if necessary. 


Used to autoload tape devices when end-of-tape is reached. 

-m link_count

Specifies the minimum link count for hashing. 

-u file

Specifies a backup object file. This file contains the object names (entire message store, user, group, mailbox, and so on) to backup. See name for a list of backup object


Executes the command in verbose mode. 


Can be 1) logical pathname of the backup object, 2) user ID, 3) message store mailbox name. Backup objects and paths: 

  • Entire message store: /

  • Message store partition: /partition_name (default: /primary)

  • Backup group—a group of users defined with regular expressions in a configuration file. See To Create Backup Groups in Sun Java System Messaging Server 6.3 Administration Guide for details. Path: /partition_name/backup_group(/primary/user represents all users under primary).

  • User: /partition_name/backup_group/user_ID

  • Mailbox:/partition_name/backup_group/user_ID/mailbox_name

  • Message:/partition_name/backup_group/user_ID/mailbox_name/msgID

User IDs: can be any user ID in the message store. If the user is not in the default domain, the user ID must be fully qualified (example: If user is in the default domain, the user ID can stand alone (example: Wally).

mailbox: An email folder. It is specified using the following message store internal name:


Note that user is a message store keyword.