Redundancy in enterprise storage networks using dual-domain SAS ...
Redundancy in enterprise storage networks using dual-domain SAS ...
Redundancy in enterprise storage networks using dual-domain SAS ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Dual-doma<strong>in</strong> <strong>SAS</strong>: servers <strong>in</strong> two-node cluster<br />
This configuration, which is also known as a high availability (HA) cluster, at least one server must<br />
have access to the <strong>storage</strong> network. The cluster <strong>in</strong>terconnect provides redundancy <strong>in</strong> the event of host<br />
bus adapter (HBA) or cable failure, as shown <strong>in</strong> Figure 4. Dual-doma<strong>in</strong> <strong>SAS</strong> requires “active/active”<br />
configurations. The “active/active” configurations permit both controllers to process I/Os, and either<br />
controller can act as a standby. To use the <strong>dual</strong>-ports for redundant pathways, all drives must be <strong>SAS</strong>.<br />
Figure 4. Multi-Path, 2-Node, HA cluster configuration<br />
Server<br />
Server<br />
HBA<br />
Cluster<br />
<strong>in</strong>terconnect<br />
4<br />
4<br />
4<br />
IO Module<br />
Expander<br />
IO Module<br />
<strong>SAS</strong> drive<br />
<strong>SAS</strong> drive<br />
<strong>SAS</strong> drive<br />
HBA<br />
4<br />
Expander<br />
JBOD<br />
6
Change language