Host Connection Path; Figure 3.1 Single Path Connection (Direct Connection) - Fujitsu ETERNUS DX80 S2 User Manual

Chapter 3 Connections
3.1 Host Connections
■ SAS
Simple, cost effective, and high performance network storage environment can be configured.
Direct connections and switch connections to servers are available.
The maximum transfer speed is 6Gbit/s.
When SAS switches are used, zoning should be set for the SAS switches to ensure the security of data.
3.1.2

Host Connection Path

This section explains the connection configuration between server Host Bus Adapters (HBAs) and ETERNUS DX
Disk storage system host interface ports.
■ Single path configuration
A single path configuration connects the ETERNUS DX Disk storage system to a server via a single path.
The server cannot access an ETERNUS DX Disk storage system when a component (such as a controller, HBA,
switch, or cable) on the path has a problem. The system must be stopped during the replacement of failed
components and controller firmware.
In a single path connection configuration, the path failover and load balancing functions are not supported.
A multipath connection configuration is recommended to maintain availability when a problem occurs.

Figure 3.1 Single path connection (direct connection)

Server
HBA
Port Port
CA
CM#0
ETERNUS DX Disk storage system
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Site Planning-
Server
HBA
Port Port
CA
CM#1
48
Copyright 2013 FUJITSU LIMITED P3AM-4822-12ENZ0