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| Sun Fire X4470 Server ### Service Manual

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Chapter 3

## Servicing CRU Components That Do Not Require Server Power Off

This chapter describes how to service customer-replaceable units (CRUs) that do not require you to power off the server.

It contains the following topics:

- 3.1 Servicing Disk Drives (CRU)

- 3.2 Servicing Fan Modules (CRU)

- 3.3 Servicing Power Supplies (CRU)

  Note - Depending on your configuration, in some cases you might have to power off the server when removing or replacing the disk drive.

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