Remote Connections (San/Wan) - Fujitsu ETERNUS DX80 S2 Overview

Chapter 3 Connection Configurations

3.2 Remote Connections (SAN/WAN)

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FC (Fibre Channel)
FC enables high speed data transfer over long distances by using optical fibers and coaxial cables. FC is
used for database servers where enhanced scalability and high performance are required.
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iSCSI
iSCSI is a communication protocol that transfers SCSI commands by encapsulating them in IP packets over
Ethernet. Since iSCSI can be installed at a lower cost and the network configuration is easier to change
than FC, iSCSI is commonly used by divisions of large companies and by small and medium-sized
companies where scalability and cost-effectiveness are valued over performance.
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FCoE
Since Fibre Channel over Ethernet (FCoE) encapsulates FC frames and transfers them over Ethernet, a LAN
environment and an FC-SAN environment can be integrated. When there are networks for multiple I/O
interfaces (e.g. in a data center), the networks can be integrated and managed.
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SAS
SAS (Serial Attached SCSI) is a serial transfer host interface that is as reliable as the normal (parallel) SCSI
interface.
SAS is commonly used for small-sized systems where performance and cost-effectiveness are valued over
scalability.
3.2 Remote Connections (SAN/WAN)
Data backup (remote copy) can be performed without using servers by connecting ETERNUS DX Disk storage
systems. Remote copy is a function that is used to mirror drive data, create a snapshot, and back up data
between separate ETERNUS DX Disk storage systems.
Remote copy supports FC and iSCSI interfaces. SAN and WAN (wide area network) are used to transfer data
between ETERNUS DX Disk storage systems.
This section describes each remote interface.
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FC (Fibre Channel)
Data can be copied and operated by taking advantage of the high speed and reliability of FC. By
compressing the data that is to be transferred using a network device, data can be transferred at high
speeds.
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iSCSI
Remote copy can be performed without FCIP converters when an IP line is used.
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ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
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