Fujitsu Eternus DX500 S3 - Storage Cluster; Figure 30 Storage Cluster

Storage Cluster
Storage Cluster is a function that allows continuous operations by using redundant connections to two ETERNUS
DX/AF storage systems so that even if the Primary storage fails, operations are switched to the Secondary stor-
age. Operations can continue without stopping access from the server if there are unexpected problems 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/AF. Transparent access from business servers is possible even after switching
to the ETERNUS DX/AF. Reallocating volumes or switching mount points is not required.
The time it takes to perform a required storage system switchover for a failover or a failback varies depending on
the connection configuration (FC or iSCSI).
Figure 30 Storage Cluster
CA
Secondar
y storage
CA
P
rimary storage
Failover
Device
f
ailure
SAN
I/O
Business server
Storage Cluster
controller
LAN
ETERNUS DX/AF ETERNUS D
X/AF
4. SAN Functions
Stable Operation
55
FUJITSU Storage ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems
Overview
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