HP Storage Mirroring V4.5 Software - Manual (Page 100)

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Route
This setting identifies the Target IP Address that the Storage Mirroring data will be transmitted
through. You should only change this setting if you want to select a different route for Storage
Mirroring traffic. On a machine with more than one NIC, this increases the flexibility of configuring
Storage Mirroring activity. For example, you can separate regular network traffic and Storage
Mirroring traffic on a machine. The default ports will be used.
Protected Databases
By default, all of the SharePoint program and data files (except the
\binn
directory) are selected for
replication to the target SharePoint server. This will allow the clients to access your production
SharePoint server data and functionality on the target in the event of a failure.
The source and target servers must both have the exact same version of SharePoint (major and
minor versions) as well as similar logical drive structures (the target must have at least the same
logical drives as the source where SharePoint program and data files are stored).
You can also select non-application specific data under the Volumes folder.
To refresh the tree view to show new source directories or files that may have been added or
removed, select the logical node, then click the Refresh button. If a node in the volumes branch is
selected, then the items under that node will be refreshed.
Mirror type
The following options specify what files you want sent from the source to the target during a mirror.

Full—Copies all of the directories and files in the replication set to the target machine. If a mirror
has already been completed, another full mirror will overwrite the data on the target.

Checksum— (Default) This option performs a checksum comparison calculation. A checksum
calculation is a formula applied to blocks of data to determine if the binary make-up of the block
is identical. If the checksums on the source and target machine are the same, the block is skipped.
If the checksums on the source and target machine are not the same, the block on the source is
sent to the target. With this option, the entire file is not overwritten; only the block that is received
from the source is overwritten.
Enable compression
This setting enables compression of data that is transmitted from the source to the target. Significant
improvements in bandwidth utilization have been seen in Wide Area Network (WAN) configurations
or in any case where network bandwidth is a constraint.
Compression may be used in Local Area Network (LAN) configurations, though it may not provide any
significant network improvements.
NOTE:

If you are using a SQL server named instance for a back-end database server in your
SharePoint setup, both the source and target SQL servers must have named instances
with the exact same name and logical drive structure as the source SQL server
installed prior to configuring protection.

To enable the ability to add or remove SharePoint instances, you can launch
Application Manager through the command line using the
/sharepoint
/advanced
option (
dtam /sharepoint /advanced
). With this option enabled,
a dialog box will appear when you select Configure Protection.

If you need to reduce the amount of mirroring and replication traffic, you may choose
to deselect the tempdb database if it is not necessary.
NOTE: If Override Generated Rules is selected on the Advanced tab, this control will be
disabled.
NOTE: The Mirror type setting also applies to the restoration connection.