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Barracuda Message Archiver

How do I configure the Barracuda Message Archiver to work with external storage?

  • Type: Knowledgebase
  • Date changed: 9 months ago
Solution #00002671

Scope:
All Barracuda Message Archivers with available external storage.

NOTE: The Expansion Storage feature is deprecated for Message Archiver models 350 and higher as of May 2013. Please refer to the TechLib article regarding Barracuda Networks Message Archiver Backup and Storage for further information. Use of the Storage Manager for Mirroring of data to network storage is supported for all Message Archiver models.



Answer:
Certain models of the Barracuda Message Archiver may be expanded with external storage. All models support mirroring by way of Common Internet File System (CIFS), which is also known as as Server Message Block (SMB) protocol or Windows Shares protocol.

The Barracuda Message Archiver is able to use CIFS shares on your network to either mirror its data or increase its total maximum storage by extending data onto external storage devices. You can only create a Mirror share for the Message Archiver?s Internal data store. To use external drives, navigate to the Advanced > Storage Manager page add your external storage devices as CIFS shares under the CIFS/Windows Share heading. You must enter the following information for each share:
  • Name - A label, or comment, for the share.
  • Share Name - The name by which the new volume is accessed.
  • Host Name - The host name of the remote machine where the share resides.
  • Username - The username under which the Barracuda Message Archiver will connect to the remote share.
  • Password - The password on the remote share for the username specified above.
Once you have added a new share, you will be able to either extend onto that share, designating it as a mirror for data redundancy. The Barracuda Message Archiver organizes storage devices and shares into groups; each group beyond the default group represents additional storage.

To add additional storage to the Barracuda Message Archiver, enter a name for the group in the field next to the Add New Group button and click the Add New Group button. This will give you an additional group, to which you can then add CIFS/Windows shares from the list under the CIFS/Windows Share heading at the bottom of the page. To do this, select the share you should like to use from the Share drop-down menu in that group and click that group's Add button.

To mirror the data in a particular group, add a total of two or more external storage shares to that group. After adding the first share to a group (as described above), the Add button will become the Add Mirror button. Then, to add additional shares to the group, select the share you should like to use from the Share drop-down menu in that group and click that group's Add Mirror button. You may also mirror data in the default group, though adding additional shares to the default group that have a smaller capacity than the Barracuda Message Archiver will limit the storage capacity of the Barracuda Message Archiver itself to the size of its smallest mirror.

When adding multiple shares to the same group for data mirroring, the total size of the share will be the total storage space available to the Barracuda Message Archiver on the share with the least space available. So, for example, if a storage group has three shares with 30 gigs, 40 gigs, and 50 gigs available to the Barracuda Message Archiver, the Barracuda Message Archiver will expand its storage capacity by 30 gigs, mirror data on each of the three drives, and not use the remaining 10 and 20 gigs on the two larger shares. Likewise, if a storage group has two shares of size 40 gigs, but one is already storing 15 gigs of data from other applications, the Barracuda Message Archiver will only store and mirror 25 gigs of data in that storage group. Adding a small share to an otherwise large group will immediately limit the size of that group to the size of the share with the least space available.

After adding a storage share to a group, a green or red indicator light should appear next to the entry. If the share is unavailable or the Barracuda Message Archiver cannot properly mount the share, it will display a red light. If the share is available, the light will be displayed as green. If you wish to enable or disable a share that has been added to a group, click on the indicator light. Any share with a red light must be manually enabled; the Barracuda Message Archiver will not automatically detect and begin using disabled shares if they suddenly become available on your network. If the share is unavailable, the Barracuda Message Archiver will prevent the share from being enabled (and output an error message as to why).

Additional Notes:
When adding a new share to an existing storage group (meaning the new share will be used as a mirror), the Barracuda Message Archiver will take a snapshot of all files already in that storage group and begin to copy them over to the new share. While it does this, the Barracuda Message Archiver will not archive any new mail, because doing so would cause the data to differ from the snapshot being used to replicate the data to the new share. New mail will be queued on the Barracuda Message Archiver until the initial data mirroring is complete, so it is usually better to add external storage shares to the Barracuda Message Archiver before many email messages are archived. Otherwise, depending on your network speed and the amount of data already present in that storage group, the Barracuda Message Archiver may queue messages for more than a day, and take even longer to catch up on archiving all of the messages that have been queued during the initial mirroring operation.


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