Chapter 1 Hardware Configurations; Controller Enclosure; Figure 1.1 Front View Of A 2.5" Type Controller Enclosure - Fujitsu ETERNUS DX60 S2 User Manual

Chapter 1
This chapter explains hardware configurations for the ETERNUS DX Disk storage system.
1.1

Controller Enclosure

This section explains the main components in the controller enclosure.
The controller enclosure contains disks installed in the front, and controllers and power supply
units in the rear.
Since the power supply units are redundant, operations can continue even if one of them fails.
There are two models: a single-controller type and a dual-controller type. For a dual-controller
type, operations can continue even if one of the controllers fails.
IMPORTANT
■
External views of a 2.5" type controller enclosure
●
Front view
Figure 1.1
ETERNUS DX60 S2 Disk storage system User's Guide -Site Planning-
Hardware Configurations
• The single-controller type differs from the dual-controller type by the fol-
lowing features:
- The controller and expander are not duplicated.
- Hot maintenance or swapping of the controller and expander is not
possible.
- Concurrent firmware loading or update of the controller firmware and
expander firmware is not possible.
- Multipath connection to a single server is not available.
• Fujitsu recommends that the dual-controller types, in which the controller
and expander are duplicated, be used in a system where a high level of
reliability is required.
2.5" disk
Front view of a 2.5" type controller enclosure
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