IBM Systems Magazine, Mainframe - July/August 2015 - 43

link speeds of 1 Gb all the way
to 8 Gb, the IBM field service
team has observed more frequent
I/O errors of interface control
checks. Link quality can degrade
due to fiber cables bending or
twisting, or because dust covers
are inadvertently left off optical
connections during upgrades. In
many cases, clients have been
careful managing the cables and
connections, but the faster links
are more sensitive and errors
can emerge that do not occur at
lower speeds.
Reusing existing client cabling
infrastructure for the 16GFC Fibre
Channel (FC) technology is critical
to minimize cost and maximize
client satisfaction with the new
technology. To achieve this, IBM
worked with business partners
to define a new standard for
enabling Forward Error Correction (FEC) code technology for
optical connections. The existing
standards were only defined
for copper connections. This
industry-leading standard enables
FEC technology to automatically
improve the quality of the FC
links end-to-end from the channel
through the FICON directors to the
storage subsystems.
With FEC enabled, errors that
may have been seen with the
faster link speeds will very likely
be corrected by the error correction technology in the optical
transmit/receive ports. In each
2,112 bit-block, FEC will correct
bit error for up to 11 consecutive
bits. Clients will see fewer I/O
errors, thus easing the transition
to the new link technologies,
reducing the potential impact
to any production workloads by
I/O errors. For optimal business
value, the end-to-end channel to
control unit path needs to run at
16 Gb link speed for the optimal
latency reduction. Likewise, each
link-the entire path from the
channel through the switch ports
to the storage subsystem-should

be protected by an FEC capable
link to minimize the risk of I/O
errors. Only the D8870 storage
subsystem provides FEC protection today.
FEC effectively reduces the
number of bit errors by 300 times

(see Figure 1, page 42).
Bit error rates (BER) are sensitive to signal to noise ratios
(SNR). At a BER of 10-6 or 10-7 the
horizontal difference between
FEC-encoded and raw data is
about 2 dB, a 58 percent SNR

ibmsystemsmag.com JULY/AUGUST 2015 // 43


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IBM Systems Magazine, Mainframe - July/August 2015

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - July/August 2015

Table of Contents
Editor's Desk: An important note
IBM Perspective: Transforming travel end to end
Partner PoV: Maximize the platform's business value by addressing challenges now
IT Today: Infrastructure matters: Myth or truth?
Case Study: Turning Complexity Into Simplicity: Vissensa Ltd. deploys an IBM Enterprise Cloud System to relieve the IT burdens of its clients
Cover Story: Industry Importance: Applying disruptive technologies in a nondisrputive way helps mainframe clients achieve business efficiency
Feature: Security Notification: Mainframe companies must be proactive and educated in testing and protection, expert says
Feature: Industry Improvements: Clients from five key industries highlight what's possible with IBM mainframe
Tech Showcase: Businesses must look at the big picture to take advantage of analytics
HotTECH Products
Administrator: New technologies with the IBM z13 and DS8870 systems aim to reduce costs and improve resilience, scale and performance
Solutions: ARCAD- Anonymizer; FDRPASVM, MVT Vault, STEPLIB-Rx 3.1; Topaz, ISPW V4.4, Savvytest 2.1
Stop Run: 'Things just clicked' for IBMer looking for his path
Reference Point - Global Events, Education, Resources for Mainframe
2015 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - July/August 2015 - Intro
IBM Systems Magazine, Mainframe - July/August 2015 - Cover1
IBM Systems Magazine, Mainframe - July/August 2015 - Cover2
IBM Systems Magazine, Mainframe - July/August 2015 - 1
IBM Systems Magazine, Mainframe - July/August 2015 - Table of Contents
IBM Systems Magazine, Mainframe - July/August 2015 - 3
IBM Systems Magazine, Mainframe - July/August 2015 - 4
IBM Systems Magazine, Mainframe - July/August 2015 - 5
IBM Systems Magazine, Mainframe - July/August 2015 - Editor's Desk: An important note
IBM Systems Magazine, Mainframe - July/August 2015 - 7
IBM Systems Magazine, Mainframe - July/August 2015 - IBM Perspective: Transforming travel end to end
IBM Systems Magazine, Mainframe - July/August 2015 - 9
IBM Systems Magazine, Mainframe - July/August 2015 - Partner PoV: Maximize the platform's business value by addressing challenges now
IBM Systems Magazine, Mainframe - July/August 2015 - 11
IBM Systems Magazine, Mainframe - July/August 2015 - IT Today: Infrastructure matters: Myth or truth?
IBM Systems Magazine, Mainframe - July/August 2015 - 13
IBM Systems Magazine, Mainframe - July/August 2015 - Case Study: Turning Complexity Into Simplicity: Vissensa Ltd. deploys an IBM Enterprise Cloud System to relieve the IT burdens of its clients
IBM Systems Magazine, Mainframe - July/August 2015 - 15
IBM Systems Magazine, Mainframe - July/August 2015 - 16
IBM Systems Magazine, Mainframe - July/August 2015 - 17
IBM Systems Magazine, Mainframe - July/August 2015 - Cover Story: Industry Importance: Applying disruptive technologies in a nondisrputive way helps mainframe clients achieve business efficiency
IBM Systems Magazine, Mainframe - July/August 2015 - 19
IBM Systems Magazine, Mainframe - July/August 2015 - 20
IBM Systems Magazine, Mainframe - July/August 2015 - 21
IBM Systems Magazine, Mainframe - July/August 2015 - Feature: Security Notification: Mainframe companies must be proactive and educated in testing and protection, expert says
IBM Systems Magazine, Mainframe - July/August 2015 - 23
IBM Systems Magazine, Mainframe - July/August 2015 - 24
IBM Systems Magazine, Mainframe - July/August 2015 - 25
IBM Systems Magazine, Mainframe - July/August 2015 - 26
IBM Systems Magazine, Mainframe - July/August 2015 - 27
IBM Systems Magazine, Mainframe - July/August 2015 - Feature: Industry Improvements: Clients from five key industries highlight what's possible with IBM mainframe
IBM Systems Magazine, Mainframe - July/August 2015 - 29
IBM Systems Magazine, Mainframe - July/August 2015 - 30
IBM Systems Magazine, Mainframe - July/August 2015 - 31
IBM Systems Magazine, Mainframe - July/August 2015 - 32
IBM Systems Magazine, Mainframe - July/August 2015 - Tech Showcase: Businesses must look at the big picture to take advantage of analytics
IBM Systems Magazine, Mainframe - July/August 2015 - 34
IBM Systems Magazine, Mainframe - July/August 2015 - 35
IBM Systems Magazine, Mainframe - July/August 2015 - 36
IBM Systems Magazine, Mainframe - July/August 2015 - HotTECH Products
IBM Systems Magazine, Mainframe - July/August 2015 - 38
IBM Systems Magazine, Mainframe - July/August 2015 - 39
IBM Systems Magazine, Mainframe - July/August 2015 - 40
IBM Systems Magazine, Mainframe - July/August 2015 - Administrator: New technologies with the IBM z13 and DS8870 systems aim to reduce costs and improve resilience, scale and performance
IBM Systems Magazine, Mainframe - July/August 2015 - 42
IBM Systems Magazine, Mainframe - July/August 2015 - 43
IBM Systems Magazine, Mainframe - July/August 2015 - 44
IBM Systems Magazine, Mainframe - July/August 2015 - Solutions: ARCAD- Anonymizer; FDRPASVM, MVT Vault, STEPLIB-Rx 3.1; Topaz, ISPW V4.4, Savvytest 2.1
IBM Systems Magazine, Mainframe - July/August 2015 - 46
IBM Systems Magazine, Mainframe - July/August 2015 - 47
IBM Systems Magazine, Mainframe - July/August 2015 - Stop Run: 'Things just clicked' for IBMer looking for his path
IBM Systems Magazine, Mainframe - July/August 2015 - Cover3
IBM Systems Magazine, Mainframe - July/August 2015 - Cover4
IBM Systems Magazine, Mainframe - July/August 2015 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - July/August 2015 - 2015 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - July/August 2015 - SE2
IBM Systems Magazine, Mainframe - July/August 2015 - SE3
IBM Systems Magazine, Mainframe - July/August 2015 - SE4
IBM Systems Magazine, Mainframe - July/August 2015 - SE5
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