572 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
13.1 Reliability, availability, and serviceability (RAS)
Reliability, availability, and serviceability (RAS) are important concepts in the design of the
IBM Flex System V7000 Storage Node. Hardware features, software features, design
considerations, and operational guidelines all contribute to make IBM Flex System V7000
Storage Node reliable.
Fault tolerance and high levels of availability are achieved as follows:
RAID capabilities of the underlying disk subsystems
IBM Flex System Flex System V7000 nodes clustering using a
Compass architecture
Auto-restart of hung nodes
Battery units to provide memory protection in the event of a site power failure
Host system failover capabilities
High levels of serviceability are achieved by providing the following capabilities:
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 IBM Flex System V7000 components
Concurrent upgrade of IBM Flex System V7000 Software and microcode
Concurrent addition or deletion of the IBM Flex System V7000 nodes canister in a cluster
Software recovery through a service panel push button
Automatic software version correction when replacing a node
Detailed status and error conditions displayed on the service panel
Error and event notification through SNMP, syslog, and email
At the heart of IBM Flex System V7000 Storage Node is a pair of node canisters. These two
canisters share the data transmitting and receiving load between the attached hosts and the
disk arrays. This section looks at the RAS features of the IBM Flex System V7000 Storage
Node system monitoring and troubleshooting.
We highly recommend that you review and be familiar with “IBM Flex System V7000 Storage
Node Configuration Limits and Restrictions,” at the following website:
http://www.ibm.com/support/docview.wss?uid=ssg1S1004369
Also, for the interoperability matrix, see the System Storage Interoperability Center (SSIC),
at the following website:
http://www.ibm.com/systems/support/storage/ssic/interoperability.wss
Before installing IBM Flex System V7000 Storage Node, make sure that you review the
content of this document: “Limitations with the Management of Flex System V7000 Storage
Node, Storwize V7000, and SAN Volume Controller Storage by IBM Flex System Manager,”
at the following website:
http://publib.boulder.ibm.com/infocenter/flexsys/information/topic/com.ibm.acc.com
montasks.doc/flex_storage_management.pdf
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