HP Direct-Connect External SAS Storage for HP BladeSystem Solutions Depoyment Guide

11 Device SAS port information
HP 3Gb SAS BL Switch port information
As shown in the following illustration:
• SAS ports: Eight per switch. Labeled 1–8 from left to right on the front of the switch. Use these
SAS ports to connect external SAS storage enclosures and tape devices.
When cabling external storage enclosures to the switch, note the following:
• Storage enclosures connected to switch ports 1–4 are reserved for use by server bays 1–8 in
the BladeSystem c-Class enclosure.
• Storage enclosures connected to switch ports 5–8 are reserved for use by server bays 9–16
in the BladeSystem c-Class enclosure.
• For optimal performance, connect two cables from the switch to each storage enclosure I/O
module or controller. This additional cable offers additional performance: one cable provides
a 4x connection; two cables provide a 8x connection.
When creating and assigning zone groups to server bays, note the following:
• Assign server bays 1–8 zone groups associated with storage enclosures connected to switch
ports 1, 2, 3, or 4.
• Assign server bays 9–16 zone groups associated with storage enclosures connected to switch
ports 5, 6, 7, or 8.
HP 3Gb SAS BL Switch port information 85