A. LCR (formerly Local Continuous Backup) maintains a second copy of a storage group (SG) either locally or on network attached storage (NAS). In Exchange, this second copy is kept synchronized with the live Information Store via an asynchronous log-shipping process that copies closed transaction logs to the second copy of the Store. These logs are then processed and applied to the database copy.
An easy way to enable LCR is while creating an SG. On the New Storage Group screen, you'll see an option to enable LCR, which lets you enter a second path for the replica of the log files. If you need to enable LCR on an existing SG, you can perform the following steps.
1. Select the SG for which you want to enable LCR, and select "Enable local continuous replication" from the Actions pane. Click Next.
2. In the Set Paths dialog box, click Browse to change the path of the system files and log files path to the LCR desired location. Ideally, this is on a different storage controller, PCI Bus, and disk from the primary copy.
3. Select he path for the database storage, which again should be on a separate controller and disk. Click Next.
4. A summary of the actions will appear. Click Enable to enable the LCR. This process might take some time because the copy of the database must be seeded (i.e., the content of the existing database copied to the copy). The process is displayed to the screen, along with the PowerShell commands to perform the actions. For example,
enable-DatabaseCopy -Identity 'DALSXC02\Forth Storage Group\Mail Database 4' -CopyEdbFilePath 'F:\LCR\SG4\DB\Mail Database 4.edb' enable-StorageGroupCopy -Identity 'CN=Forth Storage Group,CN=InformationStore,CN=DALSXC02,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Geniant,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=geniant,DC=net' -CopyLogFolderPath 'F:\LCR\SG4' -CopySystemFolderPath 'F:\LCR\SG4'