Drive Enclosures; I/O Module - Fujitsu ETERNUS DX60 S4 Design Manual

3. Hardware Configurations
Optional Product Installation Conditions
The features of each host interface are described below.
●
FC
Fibre Channel (FC) enables high speed data transfer over long distances by using optical fibers and coaxial ca-
bles. FC is used for database servers where enhanced scalability and high performance are required.
●
iSCSI
iSCSI is a communication protocol that transfers SCSI commands by encapsulating them in IP packets over Ether-
net.
Since this interface can be installed at a lower cost and the network configuration is easier to change than FC,
this interface is commonly used by divisions of large companies and by small and medium-sized companies
where scalability and cost-effectiveness are valued over performance.
●
SAS
Serial Attached SCSI (SAS) enables high speed data transfers by upgrading existing reliable SCSI connection
standards to allow serial transfers. SAS is commonly used for small-sized systems where performance and cost-
effectiveness are valued over scalability.
■
Number of Installable Controller Modules
Up to two controller modules can be installed in a controller enclosure.

Drive Enclosures

This section explains the installation conditions for drive enclosures.
■
Types of Drive Enclosures
There are two types of drive enclosures that correspond to available drive sizes (2.5" and 3.5").
Twenty-four 2.5" drives can be installed in a single 2.5" type drive enclosure.
Twelve 3.5" drives can be installed in a single 3.5" type drive enclosure.
■
Number of Installable Drive Enclosures
Up to three drive enclosures can be installed.

I/O Module

Up to two I/O modules can be installed in a drive enclosures.
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