Turning On The Power - IBM TotalStorage DS4400 User Manual

Turning on the power

Important: You must turn on the storage expansion enclosures before the DS4400
Storage Server. The controllers might not recognize the correct configuration if the
hard disk drives are turned on after the DS4400 Storage Server. For instructions on
turning on the storage expansion enclosures, refer to the storage expansion
enclosure documentation.
Note: Always wait at least 30 seconds between the time you turn off a power
Check the system documentation for the hardware devices that you intend to turn
on, and then determine the proper startup sequence. Turn on the power to each
device in the following order:
v Supporting devices
v Storage expansion enclosures
v DS4400 Storage Server
v Host
If you are restoring power to the DS4400 Storage Server after an emergency
shutdown or power outage, go to "Overtemperature condition and power supply
shutdown" on page 36.
Use the following procedure to turn on the DS4400 Storage Server and connected
devices:
1. Turn on the power to the supporting devices (for example, Ethernet switches,
2. Turn on the storage expansion enclosure. The controllers might not recognize
3. Turn on the power to the DS4400 Storage Server, as follows:
24
IBM TotalStorage DS4400 Fibre Channel Storage Server: User's Guide
switch and the time you turn on the power again.
Fibre Channel switches, and management stations).
the correct configuration if the drives are powered up after the storage server.
For instructions on turning on the storage expansion enclosures, refer to the
storage expansion enclosure documentation.
a. Verify that all communication and power cables are plugged into the back of
the DS4400 Storage Server and to a properly grounded ac electrical outlet.
b. Turn on the power-supply switches on the back of the DS4400 Storage
Server (see Figure 23 on page 25). You must turn on both power-supply
switches to take advantage of the redundant power supplies.