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NAS System
224 User Manual
12.2 Getting Started with proNAS HA
Before Configuring High Availability
Before attempting to configure two proNAS HA as a High Availability pair,
check the following requirements:
1. Each proNAS server box must have a different and unique hostname. (It is
highly recommended to use the same NAS model.)
2. Each proNAS box must have at least two static IP addresses.
3. Must have a reliable heartbeat, private net Ethernet is required, serial
RS232 is optional.
4. ProNAS HA services must be started in both proNAS servers.
5. The maximum number of logical volumes that can be created under HA is
32.
6. ProNAS HA does not support logical volumes larger than 3,800,064 MB.
Users can create and extend volumes larger than 3,800,064 MB but this
cannot be used in proNAS HA.
7. Changing hostname and IP addresses when proNAS HA is running is not
allowed.
8. Snapshot function is disabled under HA.
9. Be sure there are no scheduled snapshot task enabled either on each
proNAS box.
10. ProNAS HA service cannot be started if iSCSI volume exists, Replication is
running, or snapshots exist. Make sure to remove all iSCSI volumes, stop
Replication, or delete snapshots.
Setting up a private network:
Private net is a communication channel between the two proNAS box through which they
exchange information about their states (
heartbeats ). proNAS supports two private
network, TCP/IP Socket and RS232 Serial Port.
To setup TCP/IP private net: Connect a dedicated network into Ethernet1 adapter. You
may use a crossover cable. Ethernet0 serves as your public net.
To setup RS232 Serial Port private net: Connect a serial cable to either Com1 or Com2
for both proNAS box then configure it under the "Serial Port" tab on System Manager.
NOTE: It is recommended to use both TCP/IP and RS-232 for your
private net. Private net IP will be used for replication and RS-232
for heartbeat.
NOTE: Some proNAS models have eth0 Fast Ethernet port. In order
to have faster access to your proNAS, use the Gigabit Ethernet port
(eth1, if eth0 is Fast Ethernet) as your public net; that is where the
users access your proNAS. Then use eth2 as your Private Net.