Changing The Default Storage Configuration; Storage Configuration Examples - Overland Storage SnapServer 110 Configuration And Hardware Options Manual

Changing the Default Storage Configuration

Approximately 20% of the default RAID is available for snapshot space and 80% of
the default RAID is assigned to the primary data volume.
For example, to calculate the capacity of a SnapServer 520 with 1 TB total capacity in
its default state, consider both the hardware and software configuration:
• The four 250 GB disk drives each provide 240 GB of formatted capacity.
• The four disks in a RAID 5 configuration net 720 GB of capacity for the RAID.
• The snapshot space is 20% of the space available on the RAID, reducing the space
on the RAID for the data volume by 144 GB.
This results in a data volume capacity of 576 GB for this SnapServer 520/1 TB.
Changing the Default Storage Configuration
The SnapServer's flexible storage architecture allows for a wide variety of
implementations to suit many different storage needs. In some cases, administrators
may change the default configuration to increase capacity by modifying the
configuration of the SnapServer, or attaching one or more expansion arrays.
When a backup scheme does not require backing up from a snapshot, or when a
backup window can be used while files are not active, the snapshot space can be
reclaimed for storage on the data volume. In cases when backup is ongoing or very
frequent, a RAID 0 configuration may be more appropriate than a RAID 5. In cases
where multiple expansion arrays are being attached to the SnapServer, a
combination of a RAID 1 and hot spares may be the optimal configuration for the
SnapServer.

Storage Configuration Examples

The following examples and procedures detail three common alternative storage
configurations.
Removing the Snapshot Space
A common change to the default storage configuration is to remove the snapshot
space and add the capacity to the primary data volume. Perform the following steps
to remove the snapshot space and add its capacity to the data volume. This
procedure will preserve any data that is already present on the server.
1 Open a web browser, enter the name or IP address of the server in the address
bar, and log into the browser-based Administration Tool as an administrator.
2 Navigate to the
3 Click the RAID set you want to change, and change the Snapshot Space field,
then click
OK
28 Configuration and Hardware Options Guide
Storage > Snapshots
.
page, and click
Snapshot Space
.