Working With Hot-Swap Cooling Fans; Fan Locations - IBM TotalStorage DS4100 Installation, User's, And Maintenance Manual

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

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:
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.
Fault LED
Figure 64. Fan locations
Fan CRUs
Fault LEDs
Latches and handles
Attention:
because it might cause damage to the internal components and circuitry.
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IBM TotalStorage DS4100 Storage Server: Installation, User's, and Maintenance Guide
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.
the new drives.
The fans in the storage server draw in fresh air and force out hot air.
Fan CRU
Latch Handle
The two fan CRUs are hot-swappable and redundant.
These amber LEDs light when a fan failure occurs.
Use the latches and handles to remove or install the fan CRUs.
Do not run the storage server without adequate ventilation and cooling,
Latch Handle Fault LED
Fan CRU