Oracle ZFS Storage Appliance Service Manual page 222

7420 Controller Hardware Overview
Note -
fillers installed.
7420 CPU and Memory - Previous 7420 controller configurations support two or four (1.86
GHz or 2.00GHz) CPUs, with two memory risers required by each CPU. Four or eight 4GB or
8GB DDR3 DIMMs are installed on each riser, accommodating up to 256GB of memory for
two CPUs, or up to 512GB for four CPUs.
FIGURE 42
Refer to the service label on the cover for DIMM placement information. On every memory
riser, slots D0, D2, D4, and D6 must be populated; optionally, slots D1, D3, D5, and D7 may
be populated as a group on all installed memory risers. All DIMMs in the system must be
identical.
222 Oracle ZFS Storage Appliance Customer Service Manual • July 2016
For proper cooling, memory risers corresponding to unpopulated CPU sockets must have
7420 Controller Memory Risers