Fujitsu Eternus DX600 S3 - Automatic Switching Operation of the Storage Systems (Storage Cluster); Figure 9.2 Solution - Continuous Business (Storage Cluster)

9.1.2 Automatic Switching Operation of the Storage Systems (Storage Cluster)
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Solution Overview
Since data equivalence is maintained between two ETERNUS DX storage systems, even when one of the
ETERNUS DX storage systems fails, operation can continue by switching the I/O access destination to the oth-
er ETERNUS DX either manually or automatically (automatic failover).
Figure 9.2 Solution — Continuous Business (Storage Cluster)
Normal operation
SAN
StandbyActive
FC FC
SAN
FC FC
Standby Active
When a failure occurs
CA CA
Storage Cluster
controller
Business server
Operation
data
Operation
data
Switch Switch
ETERNUS DX
(Primary storage)
Mirrored
data
Mirrored
data
ETERNUS DX
(Secondary storage)
Operations can continue
by switching to
the Secondary storage
The Storage Cluster controller
detects a failure
in the Primary storage
ETERNUS SF
Storage Cruiser
Business server
Operation
data
Operation
data
Switch Switch
ETERNUS DX
(Primary storage)
Mirrored
data
Mirrored
data
ETERNUS DX
(Secondary storage)
Failure
Monitor Monitor
Storage Cluster
controller
Monitor Monitor
CA CA CA CA CA CA
ETERNUS SF
Storage Cruiser
Failover
Replication
Chapter 9 Solution Configuration
9.1 Continuous Business
136
FUJITSU Storage ETERNUS DX500 S3/DX600 S3 Disk storage system Configuration Guide (Basic)
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