Controller enclosure—rear panel layout
The diagram and table below display and identify important component items comprising the rear panel layout of a
representative controller enclosure (4-port Fibre Channel host interface protocol is shown in the example). For a given
host interface protocol, the rear panel view of an LFF controller enclosure and SFF controller enclosure are identical.
ACT
CLI
CLI
12Gb/s
Mfg 1
Mfg 2
Mfg 3
CACHE
DP−4
DP−1
ACT
CLI
CLI
12Gb/s
Mfg 1
Mfg 2
Mfg 3
CACHE
DP−4
DP−1
2
2
6
5
3
4
MSA 2060/2062 controller enclosure
(rear panel locator illustration)
1
1
1
AC Power switch
4
Controller module B (inverted)
2
AC Power and Cooling Module (PCM)
5
DC Power and Cooling Module (2–DC only)
3
Controller module A (see face plate details)
6
DC Power switch
Note: DC PCM is not available with MSA 1060
Figure 7 Controller enclosure: rear panel
A controller enclosure accommodates two Power and Cooling Module (PCM) Field Replaceable Units (FRUs) of the same
type—either both AC or both DC—within the PCM slots (see two instances of callout 2 above). The controller enclosure
accommodates two controller module FRUs of the same type within the controller module slots (see callouts 3 and 4
above).
TIP The PCMs and controller modules are rotated 180º from their counterparts to align with their respective
midplane connectors, as shown in the figure above.
IMPORTANT HPE MSA enclosures support dual-controller configurations only. If a partner controller fails, the
array will fail over and run on a single controller until the redundancy is restored. A controller module must be installed
in each controller module slot to ensure sufficient airflow through the enclosure during operation.
IMPORTANT Operation of the enclosure with any plug-in modules missing will disrupt the airflow, and the disks
will not receive sufficient cooling. It is essential that all slots are fitted with appropriate plug-in modules before
powering on the enclosure.
The diagrams with tables that immediately follow provide descriptions of the different controller modules and PCMs
that can be installed into the rear panel of a controller enclosure. Showing controller modules and PCMs separately from
14
Chapter 2
Components