Chapter 9. Reliability, Availability, And Serviceability - IBM z13s Technical Manual

Reliability, availability, and
Chapter 9.
serviceability
This chapter describes the reliability, availability, and serviceability (RAS) features of z13s
servers.
The z13s design is focused on providing higher availability by reducing planned and
unplanned outages. RAS can be accomplished with improved concurrent replace, repair, and
upgrade functions for processors, memory, drawers, and I/O. RAS also extends to the
nondisruptive capability for installing Licensed Internal Code (LIC) updates. In most cases, a
capacity upgrade can be concurrent without a system outage. As an extension to the RAS
capabilities, environmental controls are implemented in the system to help reduce power
consumption and meet cooling requirements.
The design of the memory on z13s servers is based on the fully redundant memory
infrastructure, redundant array of independent memory (RAIM). RAIM was first introduced
with the z196. The z Systems servers are the only systems in the industry that offer this
memory design.
RAS also provides digitally signed delivery and transmission of LIC, fixes, and
restoration/backup files. Any data that is transmitted to IBM Support is encrypted. The design
goal for z13s servers is to remove all sources of planned outages.
This chapter includes the following sections:
The RAS strategy
Availability characteristics
RAS functions
Enhanced Driver Maintenance
RAS capability for the HMC and SE
RAS capability for zBX Model 004
Considerations for PowerHA in zBX environment
IBM z Advanced Workload Analysis Reporter
RAS capability for Flash Express
© Copyright IBM Corp. 2016. All rights reserved.
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