IBM Partner Pavilion DS4100 manual Working with hot-swap cooling fans, Fan CRUs, Fault LEDs

8.Use the DS4000 Storage Manager client to monitor the status of the new drive and the progress of the data reconstruction. Wait for data reconstruction to finish (the Drive activity LED stops flashing).

Note: The Drive activity LED will continue to flash after reconstruction is finished if there is I/O activity to that drive. In that case, use the host software to determine if the data reconstruction is finished.

9.When reconstruction is finished on the new drive, repeat step 5 on page 87 through step 8 for each additional drive that you want to install.

10.Use the DS4000 Storage Manager client to configure the additional space on the new drives.

Working with hot-swap cooling fans

The storage server cooling system consists of two fan CRUs, each containing two fans. The fan CRUs circulate air inside the unit by pulling in air through the vents on the front of the drive CRUs and pushing out air through the vents in the back of each fan CRU. See Figure 64.

If two fans fail, or the fans cannot maintain an internal temperature below 70° C (158° F), the power supplies in the unit will automatically shut down (an over-temperature condition). If this occurs, you must cool the unit and restart it. See “Restoring power after an over-temperature shutdown” on page 69.

Attention: The fans in the storage server draw in fresh air and force out hot air. These fans are hot-swappable and redundant; however, when one fan fails, you must replace the fan CRU within 48 hours to maintain redundancy and optimum cooling. When you replace the failed fan CRU, be sure to install the second fan CRU within 10 minutes to prevent any overheating due to the lack of the additional fan CRU.

Fan CRU Latch Handle Fault LED

Fault LED Latch Handle Fan CRU

Figure 64. Fan locations

Fan CRUs

The two fan CRUs are hot-swappable and redundant.

Fault LEDs

These amber LEDs light when a fan failure occurs.

Latches and handles

Use the latches and handles to remove or install the fan CRUs.

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Attention: Do not run the storage server without adequate ventilation and cooling, because it might cause damage to the internal components and circuitry.

88IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide