HP 2000sa HP Direct-Connect External SAS Storage for HP BladeSystem Solutions - Page 109

Referred to as servers 1a-16a.

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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.) Devices and quantities MSA2012sa controller enclosures: 2 MSA2000 drive enclosures: 6 c7000 enclosures: 1 3Gb SAS BL Switches: 4 Server blade types: double-density Connection details • Switch in interconnect bay 5: ◦ Port 1: to MSA #2, SAS port A0 ◦ Port 2: to MSA #1, SAS port A0 • Switch in interconnect bay 6: ◦ Port 1: to MSA #2, SAS port B0 ◦ Port 2: to MSA #1, SAS port B0 • Switch in interconnect bay 7: ◦ Port 1: to MSA #2, SAS port A1 ◦ Port 2: to MSA #1, SAS port A1 • Switch in interconnect bay 8: ◦ Port 1: to MSA #2, SAS port B1 ◦ Port 2: to MSA #1, SAS port B1 Notes • As shown, when connecting MSA2012 controllers to two pairs of SAS BL Switches, only a single cable per switch can be connected, because each controller has only two ports, and needs to connect to two different switches. This configuration supports high availability, but, during a failover, there will be a slight performance reduction. Shared storage-with double-density servers 109

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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.)
Devices and quantities
MSA2012sa controller enclosures: 2
MSA2000 drive enclosures: 6
c7000 enclosures: 1
3Gb SAS BL Switches: 4
Server blade types: double-density
Connection details
•
Switch in interconnect bay 5:
◦
Port 1: to MSA #2, SAS port A0
◦
Port 2: to MSA #1, SAS port A0
•
Switch in interconnect bay 6:
◦
Port 1: to MSA #2, SAS port B0
◦
Port 2: to MSA #1, SAS port B0
•
Switch in interconnect bay 7:
◦
Port 1: to MSA #2, SAS port A1
◦
Port 2: to MSA #1, SAS port A1
•
Switch in interconnect bay 8:
◦
Port 1: to MSA #2, SAS port B1
◦
Port 2: to MSA #1, SAS port B1
Notes
•
As shown, when connecting MSA2012
controllers to two pairs of SAS BL Switches,
only a single cable per switch can be
connected, because each controller has
only two ports, and needs to connect to
two different switches. This configuration
supports high availability, but, during a
failover, there will be a slight performance
reduction.
Shared storage—with double-density servers
109