IBM AS/400e User Handbook Manual page 182

AS/400e server 820
Continuously Powered Mainstore (CPM) function is not supported on the 8xx servers. An
external UPS, combined with abnormal IPL improvements in OS/400, provides an equivalent
level of power protection and fast recovery in the event of power failure.
The supported power and packaging features are as follows:
• #7127 DASD Expansion Unit
– #7127 is a concurrent maintenance DASD 6 Position expansion feature, which may
be ordered to support an additional six disk units (for a total of 12) in the Model 820
system unit/CEC.
– Prerequisite: One #2763 or #4748 disk unit controller in the 820 CEC and the #5157
Feature Power Supply.
• #5157 Feature Power Supply
– #5157 adds an additional 575 Watt power supply to the Model 820.
– For processors #2397, #2398, #2426, and #2427, a #5157 Feature Power Supply
must be present or ordered when a feature #2884 Main Storage Expansion is added
or ordered.
– The #5157 is required when a #7127 Disk unit cage is added to a Model 820 and is
required when a #5155 Redundant Power and Cooling feature is added to a Model
820.
• #5155 Redundant Power and Cooling
– #5155 adds an additional 575 Watt power supply for redundancy and additional
cooling fans to the Model 820.
– Prerequisite: #5157 Feature Power Supply
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AS/400e System Handbook