C H A P T E R  4

Replacing Hot-Swappable and Hot-Pluggable FRUs

This chapter describes how to remove and replace the hot-swappable and hot-pluggable field-replaceable units (FRUs) in the server.

The following topics are covered:

4.1 Devices That Are Hot-Swappable and Hot-Pluggable

Hot-swappable devices are those devices that you can remove and install while the server is running without affecting the rest of the server's capabilities. In a server, the following devices are hot-swappable:

Hot-pluggable devices are those devices that can be removed and installed while the system is running, but you must perform administrative tasks beforehand. In a server, the chassis-mounted hard drives can be hot-swappable (depending on how they are configured).

4.2 Hot-Swapping a Fan

Three hot-swappable fans are located under the fan door.

Two working fans are required to provide adequate cooling for the server. If a fan fails, replace it as soon as possible to ensure system availability.

The following LEDs are lit when a fan fault is detected:

If an overtemperature conditions occurs, the front panel Overtemp LED lights.

A message is displayed on the console and logged by ALOM. Use the showfaults command at the sc> prompt to view the current faults.

4.2.1 Removing a Fan

1. Gain access to the top of the server where the fan door is located (FIGURE 4-1).

You might need to extend the server to a maintenance position. See Section 5.1.3, Extending the Server to the Maintenance Position

Figure showing how to remove a fan.

FIGURE 4-1 Fan Identification and Removal

2. Unpackage the replacement fan and place it near the server.

3. Lift the latch on the top of the fan door (FIGURE 4-1), and lift the fan door open.

The fan door is spring loaded, and you must hold it in the open position.

4. Identify the faulty fan.

A lighted LED on the top of a fan indicates that the fan is faulty.

5. Pull up on the fan strap handle until the fan is removed from the fan bay.

4.2.2 Replacing a Fan

1. With the fan door held open, slide the replacement fan into the fan bay.

2. Apply firm pressure to fully seat the fan.

3. Verify that the LED on the replaced fan and the Top fan, Service Required, and Locator LEDs are not lit.

4. Close the fan door.

5. If necessary, return the server to its normal position in the rack.

4.3 Hot-Swapping a Power Supply

The server's redundant hot-swappable power supplies enable you to remove and replace a power supply without shutting the server down, provided that the other power supply is online and working.

The following LEDs are lit when a power supply fault is detected:

If a power supply fails and you do not have a replacement available, leave the failed power supply installed to ensure proper air flow in the server.

4.3.1 Removing a Power Supply

1. Identify which power supply (0 or 1) requires replacement (FIGURE 4-2).

A lighted amber LED on a power supply indicates that a failure was detected. You can also use the showfaults command at the sc> prompt.

Figure showing the location of the power supplies and release latch.

FIGURE 4-2 Locating Power Supplies and Release Latch

2. At the sc> prompt, issue the removefru command.

The removefru command indicates if it is OK to perform a hot-swap of a power supply. This command does not perform any action, but provides a warning if the power supply should not be removed because the other power supply is not providing power to the server.


sc> removefru PSn
Are you sure you want to remove PS0 [y/n]? y
<PSn> is safe to remove.

In this command, PSn is the power supply identifier for the power supply you plan to remove, either PS0 or PS1.

3. Gain access to the rear of the server where the faulty power supply is located.

4. At the rear of the server, release the cable management arm (CMA) tab (FIGURE 4-3) and swing the CMA out of the way so you can access the power supply.

Figure showing how to rotate the cable management arm to access the power supply.

FIGURE 4-3 Rotating the Cable Management Arm

5. Disconnect the power cord from the faulty power supply.

6. Grasp the power supply handle and push the power supply latch to the right.

7. Pull the power supply out of the chassis.

4.3.2 Replacing a Power Supply

1. Align the replacement power supply with the empty power supply bay.

2. Slide the power supply into bay until it is fully seated.

3. Reconnect the power cord to the power supply.

4. Close the CMA, inserting the end of the CMA into the rear left rail bracket.

5. Verify that the amber LED on the replaced power supply, the Service Required LED, and Rear-FRU Fault LEDs are not lit.

6. At the sc> prompt, issue the showenvironment command to verify the status of the power supplies.

4.4 Hot-Swapping the Rear Blower

The rear blower on the server is hot-swappable.

The following LEDs are lit when a blower unit fault is detected:

4.4.1 Removing the Rear Blower

1. Gain access to the rear of the server where the faulty blower unit is located.

2. Release the cable management arm tab (FIGURE 4-3) and swing the cable management arm out of the way so you can access the power supply.

3. Unscrew the two thumbscrews (FIGURE 4-4) that secure the rear blower to the chassis.

Figure showing how to remove the rear blower.

FIGURE 4-4 Removing the Rear Blower

4. Grasp the thumbscrews and slowly slide the blower out of the chassis, keeping the blower level as you remove it.

4.4.2 Replacing the Rear Blower

1. Unpackage the replacement blower.

2. Slide the blower into the chassis until it locks into the power connector at the front of the blower compartment (FIGURE 4-5).

Figure showing how to replace the blower unit.

FIGURE 4-5 Replacing the Blower Unit

3. Tighten the two thumbscrews to secure the blower to the chassis.

4. Verify that the Rear Blower and Service Required LEDs are not lit.

5. Close the CMA, inserting the end of the CMA into the rear left rail bracket.

4.5 Hot-Plugging a Hard Drive

The hard drives in the server are hot-pluggable, but this capability depends on how the hard drives are configured. To hot-plug a drive you must be able to take the drive offline (prevent any applications from accessing it, and remove the logical software links to it) before you can safely remove it.

The following situations inhibit the ability to perform hot-plugging of a drive:

If your drive falls into these conditions, you must shut the system down before you replace the hard drive. See Section 5.1.2, Shutting the System Down.

4.5.1 Removing a Hard Drive

1. Identify the location of the hard drive that you want to replace (FIGURE 4-6).

Figure showing the location of the hard disk drives, release button, and latch.

FIGURE 4-6 Locating the Hard Drive Release Button and Latch

2. Issue the Solaris OS commands required to stop using the hard drive.

Exact commands required depend on the configuration of your hard drives. You might need to unmount file systems or perform RAID commands.

3. On the drive you plan to remove, push the latch release button (FIGURE 4-6).

The latch opens.

caution icon Caution - The latch is not an ejector. Do not bend it too far to the left. Doing so can damage the latch.

4. Grasp the latch and pull the drive out of the drive slot.

4.5.2 Replacing a Hard Drive

1. Align the replacement drive to the drive slot.

The hard drive is physically addressed according to the slot in which it is installed. See FIGURE 4-6. It is important to install a replacement drive in the same slot from which the drive was removed.

2. Slide the drive into the bay until it is fully seated.

3. Close the latch to lock the drive in place.

4. Perform administrative tasks to reconfigure the hard drive.

The procedures that you perform at this point depend on how your data is configured. You might need to partition the drive, create file systems, load data from backups, or have data updated from a RAID configuration.