Host Interface - Fujitsu Eternus2000 Manual

1.2 Configuration
1.2.6

Host Interface

ETERNUS2000 is available in three types: a Fibre Channel type with Fibre Channel host interfaces, an
iSCSI type with iSCSI host interfaces, and a SAS type with SAS host interfaces.
• Fibre Channel interface
• iSCSI interface
• SAS interface
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Fibre Channel supports two connection topologies, Arbitrated Loop and Fabric.
Maximum transfer speed is 4Gbps.
This interface is used for database servers, for the expandability and performance benefits it pro-
vides.
iSCSI is the protocol that sends and receives SCSI commands to IP packets on Ethernet.
Maximum transfer speed is 1Gbps.
This interface is used for a section in large companies, or for small and medium companies, since
this interface can be introduced at a lower cost than Fibre Channel interface.
To ensure efficient iSCSI performance, we recommend that networks used for general purposes,
such as accessing the Internet or transferring files, and networks used for iSCSI be physically sep-
arated.
The SAS (Serial Attached SCSI) interface uses serial rather than parallel data transfers in order to
provide improved performance, while still maintaining the high reliability of conventional SCSI.
With this interface the server is attached via a DAS (Direct Attached Storage) connection. Because
DAS connections are less scalable than SAN connections, it is recommended that use of this inter-
face be restricted to smaller-scale systems.
Maximum transfer speed is 3Gbps.
Copyright 2009 FUJITSU LIMITED
ETERNUS2000 disk storage system User Guide P3AM-2512-03EN