Server User Manual

logical volumes. With Network RAID, which is configurable on a per-volume basis, data blocks are

written multiple times to multiple nodes. In the example shown in Figure 26, Network RAID has been

configured with Replication Level 2, guaranteeing that a volume remains available despite the failure

of multiple nodes.

Figure 26. The storage cluster is able to survive the failure of two nodes

Configuring Network RAID

You can set the Network RAID configuration for a particular volume either during its creation or by

editing the volume’s properties on the Advanced tab, as shown in Figure 27. You can update

Network RAID settings at any time without taking the volume down.

The following Network RAID options are provided:

 2-Way – Up to one adjacent node failures in a cluster as seen above

 3-Way – Up to two adjacent node failures in a cluster

 4-Way – Up to three adjacent node failures in a cluster

The number of nodes in a particular cluster determines which and how many nodes can fail, based

on the selected Network RAID configuration.