5.To diagnose and correct the fault, complete the following steps:
a.Run the Recovery Guru by selecting the Recovery Guru toolbar button in the Subsystem Management window.
b.Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, use the individual LEDs to locate the failed component.
c.When the recovery procedure is completed, select Recheck in the Recovery Guru. This action reruns the Recovery Guru to ensure that the problem has been fixed.
d.If the problem has not been fixed, contact your IBM service representative. Do not turn off power until all problems are corrected.
6.Check the Cache Active LED, and verify that it is off.
If the Cache Active LED is on steady, the cache contains data. Wait for the data to clear from cache memory before turning off the power.
7.Check the LEDs on the storage expansion enclosures to verify that all Drive Active LEDs are on steady (not blinking).
If one or more LEDs are blinking, data is being written to or from the drives. Wait for all Active LEDs to stop blinking.
8.Turn off the power switch on the back of each controller in the storage subsystem.
Note: Until the power switch on each controller is turned off, power still remains turned on for the both controllers; therefore, the
9.Turn off both power switches on the back of each storage expansion enclosure in the configuration.
CAUTION:
The power switch on the power supply and fan unit does not turn off the electrical current supplied to the device. The DS4700 Express Storage Subsystem might also have more than one connection to dc power. To remove all electrical current from the device, ensure that all dc power cords are disconnected from the power supply and fan unit dc input connectors.
10.(Models with dc power supplies and fan units only) Flip all of the disconnect devices to the OFF position.
11.Remove (unplug) all of the power cords from the DS4700 Express power supply connectors.
12.After you perform the necessary maintenance procedures, turn on the power using the procedure in “Turning on the storage subsystem” on page 119.
Performing an emergency shutdown
Attention: Emergency situations might include fire, flood, extreme weather conditions, or other hazardous circumstances. If a power outage or emergency situation occurs, always turn off all power switches on all computing equipment. This helps to safeguard your equipment from potential damage due to electrical surges when power is restored. If the storage subsystem loses power unexpectedly, it might be due to a hardware failure in the power system or in the midplane.
Complete the following steps to shut down the system during an emergency:
136IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
