The 5U84 enclosures use separate CRU modules for power supply and cooling/circulation, respectively. Power supply unit (PSU) shows
the power supply module, which provides the enclosure with power connection and a power switch. Fan cooling module (FCM) shows the
fan cooling module that is used in 5U84 enclosures. The FCM is smaller than the PCM, and five of them are used within the 5U enclosure
to provide sufficient airflow throughout the enclosure.
Fan cooling module
The following figure shows the fan cooling module (FCM) used in 5U controller enclosures and optional 5U expansion enclosures.
Figure 26. Fan cooling module (FCM)
1. Module release latch 2. Handle
3. Module OK LED (Green) 4. Fan Fault LED (Amber/blinking amber)
LED behavior:
• If any of the FCM LEDs are illuminated amber, a module fault condition or failure has occurred..
• For a detailed description of FCM LEDs, see Fan cooling module LEDs.
5U84 enclosure chassis
The 5U84 enclosure includes the following features:
• 5U84 chassis configured with up to 84 LFF disks in DDICs. See Figure 20. 5U84 enclosure system - plan view of drawer accessed
from front panel.
• 5U84 chassis configured with SFF disks in 2.5" to 3.5" hybrid driver carrier adapter.
• 5U84 empty chassis with midplane, module runner system, and drawers.
The chassis has a 19-inch rack mounting that enables it to be installed onto standard 19-inch racks and uses five EIA units of rack space
(8.75").
At the front of the enclosure, two drawers can be opened and closed. Each drawer provides access to 42 slots for Disk Drive in Carrier
(DDIC) modules. DDICs are top mounted into the drawers as shown in
Figure 20. 5U84 enclosure system - plan view of drawer accessed
from front panel. The front of the enclosure also provides enclosure status LEDs and drawer status/activity LEDs.
The rear of the enclosure provides access to rear panel CRUs:
• Two controller modules or IOMs
• Two PSUs
• Five FCMs
5U84 enclosure drawers
Each enclosure drawer contains 42 slots, each of which can accept a single DDIC containing a 3.5" LFF disk drive or a 2.5" SFF disk drive
with an adapter.
Opening a drawer does not interrupt the functioning of the storage system, and DDICs can be hot-swapped while the enclosure is in
operation. However, drawers must not be left open for longer than two minutes, or airflow and cooling will be compromised.
NOTE:
During normal operation, drawers should be closed to ensure proper airflow and cooling within the enclosure.
A drawer is designed to support its own weight, plus the weight of installed DDICs, when fully opened.
18
Storage system hardware
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