Chapter 1 Hardware Configurations
1.2 Drive Enclosures
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-
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Copyright 2011 FUJITSU LIMITED
P3AM-4822-03ENZ0
The following table shows the LAN port specifications.
Table 1.3
LAN port specifications
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SCU
A System Capacitor Unit (SCU) is installed in a controller as a backup power source in case of
power outage.
The SCU is charged from an external power source while the ETERNUS DX Disk storage sys-
tem is running normally. If a power failure is detected, data in the cache memory is saved to the
non-volatile memory in the controller using the SCU. There is no limit to the post-failure data
retention time.
1.1.2
Power Supply Units
The power supply unit transforms input AC power from a power socket to DC power and supplies
power to each component. Two power supply units are installed in each controller enclosure.
Each power supply unit contains fans.
1.2
Drive Enclosures
This section explains the main components in the drive enclosure.
The drive enclosure contains drives installed in the front, and I/O modules and power supply
units in the rear. Up to 24 drives can be installed in a 2.5" type drive enclosure. Up to 12 drives
can be installed in a 3.5" type drive enclosure.
Since the power supply units are redundant, operations can continue even if one of them fails.
When a drive enclosure is connected, a DE-ID (drive enclosure number) is automatically allo-
cated.
Interface
Transfer
speed (max.)
Connector type
Number of ports
for each controller
Ethernet
(1000Base-T/100Base-TX/10Base-T)
1Gbit/s
RJ-45
2
