HP BLc7000 HP Direct-Connect External SAS Storage for HP BladeSystem Solutions - Page 111
MSA2000 with double-density servers, In all configurations using double-density servers
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MSA2000 with double-density servers This example illustrates recommended cabling when using double-density server blades with shared storage enclosures such as the MSA2000sa. In this configuration, note the following: • This example shows a dual-controller MSA2012sa controller enclosure and standard cabling. MSA2300sa controller enclosures (standard and optimal cabling) and single-controller devices are also supported. • Due to limited ports on the MSA2012sa controller, only standard cabling is available. Standard cabling offers high availability, but, during a failover, there will be a slight performance reduction. • For best possible performance, use G2 MSA2300sa controller enclosures. Because the MSA2300sa controller includes four SAS ports, optimal cabling can be used, ensuring best-possible availability. IMPORTANT: In all configurations using double-density servers, note the following: • Double-density server blades allow 32 servers in the 16 available device bays of a c7000 enclosure, by including both an "a" and a "b" server node on one blade device. • Switches in interconnect bays 5 and 6 map to the "a" server nodes in device bays 1-16. (Referred to as servers 1a-16a.) • Switches in interconnect bays 7 and 8 map to the "b" server nodes in device bays 1-16. (Referred to as servers 1b-16b.) MSA2000 with double-density servers 111