IBM System Storage DS3300, Installation, User'S, And Maintenance Manual

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The following procedure addresses two situations:
v The entire storage subsystem has been shut down (the main circuit breakers for
the rack cabinet are off).
v
Some storage expansion enclosures are being powered-on while others remain
online (the main circuit breakers for the rack cabinet are on). You might
encounter this if you are adding a storage expansion enclosure to increase
storage capacity.
Attention:
1. Repeatedly turning the power off and on without waiting for the drives to spin
down can damage the drives. Always wait at least 70 seconds after you turn
off the power before you turn it on again.
2. If you are connecting a power cord to a DS3300 or storage expansion
enclosure, turn off both of its power switches first. If the main circuit breaker
is off, make sure that both power switches are off on each storage expansion
enclosure in the rack cabinet before you turn on the main circuit breakers.
1. Are the main circuit breakers turned on?
v
Yes: Turn off both power switches on each enclosure that you intend to
connect to the power.
v
No: Turn off both power switches on all enclosures in the storage subsystem.
2. Make sure that all power cords are connected.
Note: If the power cords are not connected, turn off both power switches on all
modules in the configuration before you connect power cords or turn on
the main circuit breakers.
3. If the main circuit breakers are turned off, turn them on.
Attention: You must turn on power to each attached storage expansion
enclosure before you turn on power to the DS3300 so that the controllers
recognize all drives in the configuration during the startup process.
4. Turn on both power switches on the rear of each storage expansion enclosure
that is attached to the storage subsystem.
Check the LEDs on the front and rear of all the storage expansion enclosures.
Make sure that no amber LEDs are lit on any of the storage expansion
enclosures.
5. Turn on both ac power switches on the rear of the storage subsystem. Figure 30
shows the locations of the ac power switches on the DS3300.
Depending on the number of storage expansion enclosures in the configuration,
the storage subsystem might take up to 10 minutes to fully power-on. While
each storage enclosure powers-on, the green and amber LEDs on the front and
rear of the storage expansion enclosure turn on and off intermittently. The cache
Power
connector Power
switch Power
connector Power
switch
Figure 30. Power-supply switches and connectors for the DS3300
Chapter 4. Operating the storage subsystem
45