Chapter 5. Replacing Components; Ok To Remove Led; Working With Controllers - IBM DS3500 Installation, User's, And Maintenance Manual

Chapter 5. Replacing components

This chapter 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

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 chapter 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.
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.
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