IBM DR550, Problem Determination And Service Manual

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Field replacement for the DR550 Storage Controller
This section describes field replacement procedures for the DR550 Storage
Controller component.
Replacing a DR550 Storage Controller canister
Attention: Before you replace a DR550 controller, verify the following:
v The replacement controller part number matches the part number of the
controller to be replaced. To provide full functionality, the two controllers should
have the same cache memory capacity and FRU part number. Inserting a
non-compatible controller causes the controller to be placed in a lockout state by
the other controller in the DR550 Storage Controller chassis.
Note: The DR550 Storage Controller Subsystem controller FRU is not compatible
with the DS4700 Storage Subsystem controller FRUs.
v
Both power supply and fan units must be connected and powered on with no
Needs Attention LEDs lit. Ensure that the Power LEDs on each of the power
supply and fan units are lit. If either of the power supply and fan units is not
optimal, it is recommended that you replace that component before you proceed
with the controller replacement procedure.
v
If you are replacing an optimal controller, first make sure that the other
controller is optimal and that the fibre channel path from the hosts to the other
controller is also optimal.
Use the following procedure to replace a controller in a DR550 Storage Controller
Storage Subsystem.
Each controller has a unique hardware Ethernet address, which is printed on a
label on the front.
1. Use the DS4000 Storage Manager client software to print a storage subsystem
profile. Move logical drive ownership to the other controller. If the controller
you are replacing has failed but is still operating, move the failed controller to
an Offline state.
Attention:
Never remove a controller unless the Service Action Allowed
status LED is turned on. Doing so can result in a potential loss of data.
2. Locate the failed controller by checking the Needs Attention status LEDs on
the controllers in the storage subsystem.
3.
Is the Service Action Allowed status LED turned on?
v
Yes – Go to step 4.
v
No – Another component might require attention before you can remove
the controller. Use the Recovery Guru function in the DS4000 Storage
Manager for DR550 Subsystem Management window to identify and correct
any additional failures. If there are none, proceed with step 4 to replace the
controller.
Electrostatic discharge can damage sensitive components. Touching the storage
subsystem or its components without using a proper ground might damage
the equipment. To avoid damage, use proper antistatic protection while
handling any components.
4. Put on antistatic protection.
5.
Unpack the new controller. Save all packing materials in the event you need
to return the new controller.
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DR550 Version 4.5 Problem Determination and Service Guide