Reliability, Availability, And Serviceability Features - IBM Storwize V5010 Manual

12.1 Reliability, availability, and serviceability features

This section describes the reliability, availability, and serviceability (RAS) features of the IBM
Storwize V5000 Gen2, as well as monitoring and troubleshooting. RAS features are important
concepts in the design of the IBM Storwize V5000 Gen2. Hardware and software features,
design considerations, and operational guidelines all contribute to make the IBM Storwize
V5000 Gen2 reliable.
Fault tolerance and a high level of availability are achieved with the following features:
The RAID capabilities of the underlying disk subsystems
The software architecture that is used by the IBM Storwize V5000 Gen2 nodes
Auto-restart of nodes that are stopped
Battery units to provide cache memory protection in a site power failure
Host system multipathing and failover support
High levels of serviceability are achieved with the following features:
Cluster error logging
Asynchronous error notification
Dump capabilities to capture software-detected failures
Concurrent diagnostic procedures
Directed maintenance procedures
Concurrent log analysis and memory dump data recovery tools
Concurrent maintenance of all of the IBM Storwize V5000 Gen2 components
Concurrent upgrade of IBM Storwize V5000 Gen2 software and microcode of drives
Concurrent addition or deletion of a node canister in a cluster
Software recovery through the Service Assistant Tool
Automatic software version correction when a node is replaced
Detailed status and error conditions that are displayed through the Service Assistant Tool
Error and event notification through Simple Network Management Protocol (SNMP),
syslog, and email
Access to the Service Assistant Tool through the tech port for network connection
problems
Remote support personnel is able to access the system to complete troubleshooting and
maintenance tasks
At the core of the IBM Storwize V5000 Gen2 is a redundant pair of
canisters share the load of transmitting and receiving data between the attached hosts and
the disk arrays.
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Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
node canisters
. The two