Storage Cluster; Figure 4.3 Storage Cluster - Fujitsu ETERNUS DX500 S3 Overview

Chapter 4 SAN Functions
4.2 Stable Operation
4.2.3

Storage Cluster

Storage Cluster is a function that allows continuous operations by using redundant connections to multiple
ETERNUS DX storage systems so that even if the Primary storage fails, operations are switched to the Secon-
dary storage. Operations can continue without stopping access from the server if there are unexpected prob-
lems or if the storage system is in an error state due to severe failures.
Volumes that are accessed from business servers remain accessible with the same drive or mount point even
after switching to the ETERNUS DX. Transparent access from business servers is possible even after switching
to the ETERNUS DX. Reallocating volumes or switching mount points is not required.

Figure 4.3 Storage Cluster

ETERNUS DX
Business server
FC
SAN
Failover
CA
Device
failure
Primary storage
FUJITSU Storage ETERNUS DX500 S3/DX600 S3 Disk storage system Overview
Copyright 2015 FUJITSU LIMITED
Storage Cluster
controller
I/O
CA
Secondary storage
57
LAN
ETERNUS DX
P3AM-7702-14ENZ0