Chapter 3 Connections
3.4 Power Supply Connection
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-
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LAN for remote support
Various failures that occur in the ETERNUS DX Disk storage system are notified to the remote
support center. Remote support connection can be separated from the LAN for operation man-
agement.
3.4
Power Supply Connection
Connect the power cords (AC cables) of the ETERNUS DX Disk storage system to the power
sockets, the UPS sockets, or the power control unit sockets.
Refer to
"2.5 Outlet/Socket Specifications" (page 35)
for details about the types and the number
of power outlets/sockets.
3.4.1
Input Power Supply Lines
Multiple power supply facilities in the building or UPS units are recommended for power supply
redundancy. When the ETERNUS DX Disk storage system power supply is redundantly config-
ured, business can continue even if one of the power lines fails.
Alternatively, optimal system design (including the server) may instead lead to the ETERNUS DX
Disk storage system being configured with only a single power supply facility or UPS unit. Which
configuration is selected will depend on system availability requirement considerations.
Figure 3.13 Dual-line power supply when connecting to power sockets
Two power supply units (PSU#0 and PSU#1) are installed in each
enclosure.
Make sure that power cords are connected to both of the power supply
units.
Power distribution unit
ETERNUS DX
Disk storage system
P
o
w
er supply
facility
Line 1
Line 0
PSU
PSU
P
o
w
er supply
facility