IBM Enterprise Storage Server 2105 E10, Introduction And Planning Manual

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Each ESS expansion enclosure has dual power cables and redundant power. The
redundant power system allows both the storage controller and DDMs to continue
normal operation when one of the power cables is inactive. Redundancy also
ensures continuous data availability.
ESS Models E10 and F10 support a maximum of 64 DDMs. The minimum
configuration for a Model E10 or F10 base enclosure is 16 DDMs. ESS Models E20
and F20 support a maximum of 128 DDMs. With the expansion enclosure, Models
E20 and F20 support a maximum of 384 DDMs.
Host systems supported by the ESS
The ESS provides heterogeneous data storage that you can share between
workloads for open-systems hosts. The following sections contain information about:
v
Open-systems hosts with small computer system interface (SCSI) adapters
Front view Rear view
Figure 1. Models E10, E20, F10, and F20; front and rear views
Front view Rear view
Figure 2. Expansion enclosure, front and rear views
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ESS Introduction and Planning