IBM 3401-S03, Appliance Operation Manual, Page: 61 / 82

4. Check that the release latch has returned to its locked position, as shown in the following figure.
Note:
The drawers must be populated with drives in whole rows at a time (three rows of 14 drives per
drawer). Observe the following rules:
v The minimum number of drives in an enclosure is 14.
v The number of rows must not differ by more than 1 between top and bottom drawers.
v The rows must be populated from the front to the rear of the enclosure.
Replace a cooling module
The process involves removing the existing module and inserting a new one.
Removing a cooling module
Important: Before you remove a module, make sure that you have a replacement module to insert.
1.
Identify the cooling module to be removed. If the module failed, the fan fault LED displays an amber
color, as shown in the following figure.
Figure 39. Latch position of a correctly inserted drive
Figure 40. Cooling module LEDs
Chapter 6. Module replacement
45