Depending on the identity of the appliance (backup system or replication target), the storage can be allocated among backups/replication, vaulting, and instant recovery. Resources allocated for a virtual failover client (VFC) can no longer be used for other features such as backups, archives, or deduplication.
The amount of storage you allocate for instant recovery on the appliance should be greater than the sum of the used space on all of the original clients for which you will create VFCs.
Before allocating storage, it is recommended that you note the following:
• The system load and utilization (see To determine the system load and utilization).
• The storage used on the client. The amount of storage you allocate for instant recovery on the appliance should be greater than the sum of the used space on all of the original clients for which you will create VFCs. You can determine the amount of space used on a client by selecting the computer window and viewing the disks. The figure below provides an example.
1 On the Unitrends appliance that will run the VFC, select Settings > Storage and Retention > Storage Allocation. You see the storage allocation chart which shows the storage allocated for backup/replication, vaulting, and instant recovery.
2 Allocate storage for instant recovery by sliding the pie chart or entering the desired size in the field below the graphic. The amount of storage allocated for instant recovery should be greater than the sum of the used space on the original Windows clients.
If the storage allocated for instant recovery is insufficient, an alert and SNMP trap is issued to help you quickly detect and resolve the space allocation issue.
3 Click Confirm. You see a summary window with the new allocation.
4 Click Yes to confirm the new settings.