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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.
2.
Ensure 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 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 drive-side mini hubs matches the lowest
operating fibre channel speed on the attached drive expansion enclosures.
Attention: You must turn on power to each attached storage expansion
enclosure before turning on power to the DS4500 Storage Subsystem to ensure
that the controllers recognize all drives in the configuration during the startup
process.
5. 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 Fault 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 very 2 seconds) until the
drive is started by the DS4500 controller.
6. Turn on both AC power switches on the back of each power supply in the
storage subsystem. Figure 84 on page 112 shows the location of the AC power
switches on the power supplies.
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.
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.
7. Determine the status of all storage subsystems and components in the
configuration by completing the following steps:
a. Check all LEDs on each component in the storage expansion enclosures.
Ensure that all the LEDs show normal status. For more information on LED
status for storage expansion enclosures, see the Installation, User’s, and
Maintenance Guide for your DS4000 storage expansion enclosure.
b. Check all LEDs on each component in the storage subsystem. Ensure that
all the LEDs show normal status. For information about LED status, see
“Checking the LEDs” on page 127.
120 IBM TotalStorage DS4500 Fibre Channel Storage Subsystem: Installation, User’s, and Maintenance Guide