IBM System Storage Subsystem DS5020 - Manual (Page 126)

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 DS5020 storage subsystem to make
sure 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 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 DS5020 controller.
6. Turn on both power switches on the back of each controller in the storage
subsystem.
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.
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.
Make sure that all the LEDs show normal status. For more information about
LED status for storage expansion enclosures, see “Checking the LEDs” on
page 101 or the Installation, User’s, and Maintenance Guide for your
storage expansion enclosure.
b. Check all LEDs on each component in the storage subsystem. Make sure
that all the LEDs show normal status. For information about LED status, see
“Solving problems” on page 153.
c. Open the DS Storage Manager Subsystem Management window, and
display the Physical View for the configuration.
The status for each component will be either Optimal or Needs Attention.
96 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide