Acronis Active Restore Or Dial Tone Recovery - ACRONIS RECOVERY - FOR MICROSOFT EXCHANGE Manual

While restoring to another storage group overwrite database with the
same name
With this parameter selected, databases will be overwritten with databases with the
same name from the archive. Otherwise, restoring such databases will fail.

8.5 Acronis Active Restore or Dial Tone Recovery?

Acronis Recovery for MS Exchange allows a faster databases recovery using two
methods – Acronis Active Restore and dial tone mode. This section describes
differences and advantages of each method.
Using Acronis Active Restore
After starting the restore task with Acronis Active Restore feature activated, Microsoft
Exchange databases will be dismounted. Then, Acronis Recovery for MS Exchange will
check free space in the temporary folder, selected for logs. If there is not enough free
space to locate logs, the task will fail, and databases will remain
Acronis Active Restore acts the following way: after starting a restore task, a backed
up database is mounted directly from the archive. Then transaction logs, which are
being taken from the archive, will be applied. It is important, that database becomes
available for users after a short time – users can work with their folders, calendars, e-
mails. All other data is being restored from the archive in the background. After the
restore operation is completed, the database will be remounted, which takes less, than
a minute.
Please note, using Acronis Active Restore is inefficient if archives are located
on tapes or ftp servers – this operation may be time consuming.
Using Dial Tone Recovery
Restoring a huge Microsoft Exchange Server database may take several hours before
users can start working with it again after a disaster. But Acronis Recovery for MS
Exchange makes it possible to use a dial tone to recover e-mail service in the first
place, and only then restore users' data as it becomes available (only in Microsoft
Exchange Server 2007).
Main advantages of using dial tone mode are independence from the log's size and
almost instant access to the e-mail service.
At first, a temporary empty dial tone database will be created. Microsoft Exchange
Server will create new mailboxes (with the same GUID values as the old ones) in this
database, so that users can start sending and receiving e-mails, but other data (such
as contact lists, rules, stored e-mails, etc.) still will not be available. This process takes
only two minutes or even less. After restoring the database to the selected location
and applying logs, all recovered data will be merged with new e-mails (which were
sent or received during the dial tone recovery) bringing mailboxes to the up-to-date
state, which takes the database off-line for several minutes. On operation completion,
temporary dial tone databases will be deleted.
Note, public folders can not be restored using dial tone mode, i.e while
restoring storage groups, which contain mailboxes and public folders, only
mailboxes will be restored. We recommend you to restore public folders
separately, not using dial tone mode.
dismounted
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