IBM Systems Magazine, Mainframe - January/February 2014 - 16

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16 // JANUARY/FEBRUARY 2014 ibmsystemsmag.com

By extending auxiliary storage
with Flash Express, IBM improves
execution times for workload transition
and reduces system dump times.

A pair of adapters supplies
approximately 1.4 TB of
addressable storage-class memory
with Flash Express, and up to four
adapter pairs can be installed
in a system. The flash memory
on an adapter pair is managed
as a set of 16 GB increments. An
increment may be allocated for
use by a single partition, and a
pair of flash adapters can serve
increments for up to 60 partitions.

Resilient and Secure
A key characteristic of IBM
System z hardware is its
resiliency to failures through
system redundancy. The Flash
Express subsystem carries on this
design principle. At all levels of
the system, the hardware and
software have been designed to
recover from spontaneous failures
without interrupting application
operation. In addition, this design
of redundancy is leveraged to
enable nondisruptive service for
the subsystem.
Throughout the lifetime of
data on the SSDs and during
its transit from SSD to the
application, protection measures
are in place to detect and, in
most cases, correct errors. When
data is transferred through the
I/O subsystem, the protocol
standards (e.g., SAS, PCIe, etc.)
provide protection and recovery
mechanisms. The I/O hub
provides range checking on the
PCIe addresses sent up from the
adapter. Lastly, all data in IBM
System z memory is protected
using an error-detection and
correction scheme.

What's stored on the SSDs is
typically customer data that must
be protected. Because the SSDs
are persistent, their contents must
be encrypted to protect client
data in case the adapters are
removed from the system. This
is accomplished using inline,
256-bit Advanced Encryption
Standard encryption. The data is
encrypted by the SSD hardware
as it's written into the flash
memory cells and is decrypted as
it's read out. The encryption key
is completely contained within
the device. Access to the devices
is restricted through the use of
an authentication key setup and
managed by I/O firmware using a
smart card in the SE.

Flash Foundation
The Flash Express feature
exploits flash memory for
mainframe-class computing.
Through careful management
by system software and a design
policy of redundancy, IBM
has taken industry-standard
flash memory technology and
packaged it for high-performance
and enterprise-class reliability,
availability and serviceability.
By extending auxiliary storage
with Flash Express, IBM
improves execution times
for workload transition and
reduces system dump times.
With these improvements,
Flash Express provides an
enhanced client experience
today and lays a foundation for
further enhancements in future
generations of IBM System z
enterprise servers.


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IBM Systems Magazine, Mainframe - January/February 2014

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - January/February 2014

Table of Contents
Editor's Desk: The father of innovation
IBM Perspective: Mainframe innovation continues
Trends: RDz family of tools helps organizations address new paradigms and business expectations
IT Today: Flash Express integrates secure, high-performance storage within System z
Case Study: Weather or Not: Met Office makes a cost-conscious and test-driven decision to consolidate Linux instances on the mainframe
Cover Story: The System z influence: How mainframe innovations have helped shape and reshape the IT world
Feature: Always moving forward: IBM's System z platform has many more tricks up its sleeve
Tech Corner: JES2 SAPI POST optimization can yield results
How To: How to successfully implement zBX hybrid computing
Solutions: Attunity Replicate 2.1, InSync Plugin, Storage Director 4.1
Stop Run: Coin collecting and history fascinate mainframe strategist
Reference Point - Global Events, Education, Resources for Mainframe
2014 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - January/February 2014 - Intro
IBM Systems Magazine, Mainframe - January/February 2014 - Cover1
IBM Systems Magazine, Mainframe - January/February 2014 - Cover2
IBM Systems Magazine, Mainframe - January/February 2014 - 1
IBM Systems Magazine, Mainframe - January/February 2014 - Table of Contents
IBM Systems Magazine, Mainframe - January/February 2014 - 3
IBM Systems Magazine, Mainframe - January/February 2014 - 4
IBM Systems Magazine, Mainframe - January/February 2014 - 5
IBM Systems Magazine, Mainframe - January/February 2014 - Editor's Desk: The father of innovation
IBM Systems Magazine, Mainframe - January/February 2014 - 7
IBM Systems Magazine, Mainframe - January/February 2014 - IBM Perspective: Mainframe innovation continues
IBM Systems Magazine, Mainframe - January/February 2014 - 9
IBM Systems Magazine, Mainframe - January/February 2014 - Trends: RDz family of tools helps organizations address new paradigms and business expectations
IBM Systems Magazine, Mainframe - January/February 2014 - 11
IBM Systems Magazine, Mainframe - January/February 2014 - 12
IBM Systems Magazine, Mainframe - January/February 2014 - 13
IBM Systems Magazine, Mainframe - January/February 2014 - IT Today: Flash Express integrates secure, high-performance storage within System z
IBM Systems Magazine, Mainframe - January/February 2014 - 15
IBM Systems Magazine, Mainframe - January/February 2014 - 16
IBM Systems Magazine, Mainframe - January/February 2014 - 17
IBM Systems Magazine, Mainframe - January/February 2014 - Case Study: Weather or Not: Met Office makes a cost-conscious and test-driven decision to consolidate Linux instances on the mainframe
IBM Systems Magazine, Mainframe - January/February 2014 - 19
IBM Systems Magazine, Mainframe - January/February 2014 - 20
IBM Systems Magazine, Mainframe - January/February 2014 - 21
IBM Systems Magazine, Mainframe - January/February 2014 - Cover Story: The System z influence: How mainframe innovations have helped shape and reshape the IT world
IBM Systems Magazine, Mainframe - January/February 2014 - 23
IBM Systems Magazine, Mainframe - January/February 2014 - 24
IBM Systems Magazine, Mainframe - January/February 2014 - 25
IBM Systems Magazine, Mainframe - January/February 2014 - 26
IBM Systems Magazine, Mainframe - January/February 2014 - 27
IBM Systems Magazine, Mainframe - January/February 2014 - Feature: Always moving forward: IBM's System z platform has many more tricks up its sleeve
IBM Systems Magazine, Mainframe - January/February 2014 - 29
IBM Systems Magazine, Mainframe - January/February 2014 - 30
IBM Systems Magazine, Mainframe - January/February 2014 - 31
IBM Systems Magazine, Mainframe - January/February 2014 - Tech Corner: JES2 SAPI POST optimization can yield results
IBM Systems Magazine, Mainframe - January/February 2014 - 33
IBM Systems Magazine, Mainframe - January/February 2014 - How To: How to successfully implement zBX hybrid computing
IBM Systems Magazine, Mainframe - January/February 2014 - 35
IBM Systems Magazine, Mainframe - January/February 2014 - 36
IBM Systems Magazine, Mainframe - January/February 2014 - 37
IBM Systems Magazine, Mainframe - January/February 2014 - Solutions: Attunity Replicate 2.1, InSync Plugin, Storage Director 4.1
IBM Systems Magazine, Mainframe - January/February 2014 - 39
IBM Systems Magazine, Mainframe - January/February 2014 - Stop Run: Coin collecting and history fascinate mainframe strategist
IBM Systems Magazine, Mainframe - January/February 2014 - Cover3
IBM Systems Magazine, Mainframe - January/February 2014 - Cover4
IBM Systems Magazine, Mainframe - January/February 2014 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - January/February 2014 - 2014 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - January/February 2014 - SE2
IBM Systems Magazine, Mainframe - January/February 2014 - SE3
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