Chapter 5. Replacing components
This section contains information about replacing the storage subsystem and
storage enclosure components and installing optional devices.
Attention: To avoid overheating the storage enclosure and causing damage to its
components, replace failed parts within 10 minutes. The Recovery Guru in the
Storage Manager software identifies failed parts.
Do not remove the failed part from the storage enclosure until you:
v Review the replacement procedure for the failed part in this guide.
v Locate screw drivers or any other hand tools that you might need to replace the
failed part.
v Receive the replacement part and are ready to install it in the enclosure.
OK to remove LED
This section describes the different indications of the OK to remove LED.
Before you begin, ensure that you wear an anti-static wrist strap.
Each controller, ESM, and power supply has a blue OK to remove LED. The
purpose of the OK to remove LED is to help ensure that a component is not
removed before it is safe to do so. Do not remove any component unless the
component OK to remove LED is lit.
Attention
If you remove a controller, ESM, or power supply when the OK to remove LED is
not lit, a loss of data availability can result. If an amber LED is lit and the
associated OK to remove LED is not lit, you must perform additional diagnostics
before you can remove the indicated component. Use the Recovery Guru
instructions in the Subsystem Management window or see the applicable
component replacement instructions in this section for the additional diagnostics
that are required in this case.
The OK to remove LED automatically turns on or off as conditions change. Wait at
least 2 minutes after you replace a component for the storage subsystem to
recognize the new component and update the LED status. In most cases, when a
single component fails, the OK to remove LED stays lit when the amber LED is lit
for the component.
Working with controllers
This section describes how to remove a controller, remove and install a cover,
install a controller, replace a controller, and dispose of the system-board battery on
the controller.
Before you begin, ensure that you wear an anti-static wrist strap.
© Copyright IBM Corp. 2010, 2013 105
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