Working With Hot-Swap Cooling Fans - IBM FAStT200 Installation And User Manual

7. Check the green Drive activity LED and the amber Drive fault LED below the new
8. Use the storage-management software to monitor the status of the new drive and
9. When reconstruction is finished on the new drive, repeat step 5 on page 45
10. Use the storage-management software to configure the additional space on the

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.
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
overtemperature condition). If this occurs, you must cool the unit and restart it. See
"Restoring power after an overtemperature shutdown" on page 28.
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, the fan CRU
must be replaced 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.
46
IBM FAStT200 and FAStT200 HA Storage Servers Installation and User's Guide
Note: If your storage subsystem has active hot spares, data might not start
copying to the new drive until the data is reconstructed on the hot spare.
This increases the time that is required to complete the procedure.
drive CRUs.
Make sure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the drives spin up.
• If the Drive activity LED is off, the drive CRU might not be installed correctly.
Remove the drive CRU, wait 30 seconds, and then reinstall it.
• If the Drive fault LED stays on or the Drive activity LED stays off, the new
drive might be faulty. Refer to the storage-management software for problem
determination.
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.
through step 8 for each additional drive that you want to install.
new drives.
Fan CRU
Fault LED Latch Handle
Latch Handle Fault LED
Fan CRU