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Reliability, Availability, and Security
The System z10 EC is designed to deliver industry lead-
ing reliability, availability and security our customers have
come to expect from System z servers. System z10 EC
RAS is designed to reduce all sources of outages by
reducing unscheduled, scheduled and planned outages.
Planned outages are further designed to be reduced by
eliminating pre-planning requirements. These features are
designed to reduce the need for a Power-on-Reset (POR)
and help eliminate the need to deactivate/activate/IPL a
logical partition.
Availability Functions
With the z10 EC, significant steps have been taken in the
area of server availability with a focus on reducing pre-
planning requirements. Pre-planning requirements are min-
imized by delivering and reserving 16 GB for HSA so the
maximum configuration capabilities can be exploited. And
with the introduction of the ability to seamlessly include
such events as creation of LPARs, inclusion of logical
subsystems, changing logical processor definitions in an
LPAR, and the introduction of cryptography into an LPAR.
Features that carry forward from previous generation pro-
cessors include the ability to dynamically enable I/O, and
the dynamic swapping of processor types.
Enhanced Book Availability
With proper planning, z10 EC is designed to allow a
single book, in a multi-book server, to be non-disrup-
tively removed from the server and re-installed during an
upgrade or repair action. To minimize the effect on current
workloads and applications, you should ensure that you
have sufficient inactive physical resources on the remain-
ing books to complete a book removal.
For customers configuring for maximum availability we rec-
ommend to purchasing models with one additional book.
To ensure you have the appropriate level of memory, you
may want to consider the selection of the Flexible Memory
Option features to provide additional resources when
completing an Enhanced Book Availability action or when
considering plan ahead options for the future. Enhanced
Book Availability may also provide benefits should you
choose not to configure for maximum availability. In these
cases, you should have sufficient inactive resources on
the remaining books to contain critical workloads while
completing a book replacement. Contact your IBM rep-
resentative to help you determine and plan the proper
configuration to support your workloads when using non-
disruptive book maintenance.
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