Power; Functional Overview - IBM DS8882F Introduction And Planning Manual

Power

Two redundant 3 kVA battery backup modules supply 230 V AC power to the
DS8882F storage system. Each battery backup module receives input power from a
single-phase line cord.
If both battery backup modules lose input power, they have sufficient capacity to
continue to supply AC power to the DS8882F until it has completed a fire hose
dump to protect modified data. The system will then gracefully power off.

Functional overview

The following list provides an overview of some of the features that are associated
with DS8882F.
Note: Some storage system functions are not available or are not supported in all
environments. See the IBM System Storage Interoperation Center (SSIC) website
(www.ibm.com/systems/support/storage/config/ssic) for the most current
information on supported hosts, operating systems, adapters, and switches.
Nondisruptive and disruptive activities
Energy reporting
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DS8882F Introduction and Planning Guide
Each of the four 16 Gbps Fibre Channel ports on a PCIe-attached adapter
can be independently configured to use SCSI/FCP or FICON/zHPF
protocols. Both longwave and shortwave adapter versions that support
different maximum cable lengths are available. The host-adapter ports can
be directly connected to attached hosts systems or storage systems, or
connected to a storage area network. SCSI/FCP ports are used for
connections between storage systems. SCSI/FCP ports that are attached to
a SAN can be used for both host and storage system connections.
The High Performance FICON Extension (zHPF) protocol can be used by
FICON host channels that have zHPF support. The use of zHPF protocols
provides a significant reduction in channel usage. This reduction improves
I/O input on a single channel and reduces the number of FICON channels
that are required to support the workload.
DS8882F supports full redundancy, but some components are a single point
of repair. It is designed to support nondisruptive changes: repair, and
licensed function upgrades. In addition, logical configuration changes can
be made nondisruptively. For example:
v An increase in license scope is nondisruptive and takes effect
immediately. A decrease in license scope is also nondisruptive but does
not take effect until the next IML.
v Easy Tier helps keep performance optimized by periodically
redistributing data to help eliminate drive hot spots that can degrade
performance. This function helps balance I/O activity across the drives
in an existing drive tier. It can also automatically redistribute some data
to new empty drives added to a tier to help improve performance by
taking advantage of the new resources. Easy Tier does this I/O activity
rebalancing automatically without disrupting access to your data.
You can use the DS8882F to display the following energy measurements
through the DS CLI:
v Average inlet temperature in Celsius
v Total data transfer rate in MB/s
v Timestamp of the last update for values