Datasheet

8068ch13-Maintenance and Troubleshooting.fm Draft Document for Review January 29, 2013 12:52 pm
524 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 the IBM Flex System V7000
Storage Node reliable.
Fault tolerance and high levels of availability are achieved by:
򐂰 The 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:
򐂰 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 the 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.
13.2 Hardware and LEDs descriptions
This documentation helps you determine the system state using the LED indicators on the
enclosure
13.2.1 Understanding the system state using the control enclosure LEDs
The IBM Flex System V7000 Storage Node control enclosure is installed in the IBM Flex
System Enterprise Chassis and the machine type and model (MTM) is as followes:
򐂰 Machine type and model (MTM) for the control enclosure is 4939-A49, 4939-H49, or
4939-X49.
򐂰 Machine type and model (MTM) for the expansion enclosure is 4939-A29, 4939-H29, or
4939-X29.
It contains two node canisters and up to 24 2.5-inch drives. Both spinning hard disk drives
(HDD) and solid state drives (SSD) are supported.