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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. For dc power supply and fan units only, turn off the disconnect
devices for all of the dc power supply and fan units.
2. Ensure that all power cords are connected. See “Cabling the ac power supply
for ac models” on page 111 or “Cabling the dc power supply for dc models” on
page 111 for details, depending on your model.
Note: If the power cords are not connected, turn off both power switches on
all modules in the configuration before connecting power cords or
turning on the main circuit breakers.
3. If the main circuit breakers are turned off, turn them on.
4. Verify that the link rate setting on the front of the storage expansion enclosure
matches the speed of the drives in the subsystem.
Attention: You must turn on power to each attached storage expansion
enclosure before turning on power to the DS4700 Express Storage Subsystem
to ensure that the controllers recognize all drives in the configuration during
the startup process.
5. (For models with dc power supply and fan units only) Verify that any attached
disconnect devices are turned ON.
6. Turn on both power switches on the back of each storage expansion enclosure
attached to the storage subsystem. While each storage expansion enclosure
powers up, the green and amber LEDs on the front and back of the storage
expansion enclosure turn on and off intermittently. Depending on your
configuration, it can take several minutes for each storage expansion
enclosure to power up.
Check the LEDs on the front and back of all the storage expansion enclosures.
Verify that no Needs Attention or enclosure ID LEDs light on any of the storage
expansion enclosures. To verify the fibre channel connections between the
drive expansion enclosures, make sure that no Port Bypass LEDs for
connections to other storage expansion enclosures are lit. Only the Port
Bypass LED of the ESM port that connects directly to the storage subsystem
drive port should be lit.
Note: The drive activity LEDs will flash slowly (once every 2 seconds) until the
drive is started by the DS4700 Express controller.
7. Turn on both power switches on the back of each controller in the storage
subsystem. See Figure 4 on page 13 and Figure 5 on page 13 for power
switch locations on ac power supply and fan units and see Figure 8 on page
15 and Figure 9 on page 16 for power switch locations on dc power supply
and fan units.
Depending on the number of storage expansion enclosures in the
configuration, the storage subsystem might take several minutes to power up.
The battery self-test might take an additional 15 minutes. The LEDs will blink
intermittently until the storage subsystem powers up and completes the battery
self-test. The green Battery Charging LED will flash slowly (once every 2
seconds) until the battery is fully charged.
Before attempting any operations, wait at least five minutes for the storage
subsystem to completely power up. A storage subsystem can take up to 10
minutes to power on and up to 15 more minutes to complete its controller
battery self-test. During this time, the indicator lights on the front and back of
the module blink intermittently.
120 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide