Fujitsu DX60S2 CD Player User Manual


 
Chapter 3 Connections
3.1 Host Connections
ETERNUS DX60 S2 Disk storage system User’s Guide -Site Planning-
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Copyright 2012 FUJITSU LIMITED P3AM-5492-04ENZ0
Table 3.1 Ethernet frame capacity (Jumbo Frame settings)
SAS
Simple, cost effective, and high performance network storage environment can be configured.
Direct connections to servers are available.
The maximum transfer speed is 3Gbit/s.
3.1.2 Host Connection Path
This section explains the connection configuration between a server Host Bus Adapter (HBA)
and an ETERNUS DX Disk storage system host interface port.
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.
Jumbo Frame settings Ethernet frame capacity
Enabled Up to 9000 bytes
Disabled Up to 1500 bytes
Confirm that the connected device supports Jumbo Frame before
enabling Jumbo Frame.
Server-side CPU load can be reduced by using Jumbo Frame.
However, I/O performance may be reduced by 10% to 30%.
When using a LAN switch that supports the Flow Control function,
disable the Flow Control function.
When connecting to a server with VMware vSphere 4.0/4.1, disable
the Flow Control function of the LAN switch.
Up to two paths are allowed when the ETERNUS Multipath Driver is used.