HP StorageWorks MSA2012i HP StorageWorks 2000 Modular Smart Array Reference Gu - Page 171
Viewing the Event Log, Viewing Statistics
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Viewing the Event Log The system's event log contains important information about the status of the system, virtual disks, and disk drives. Check it regularly to monitor the status of your system. For information about viewing the event log and about specific events and errors, see "Using Event Logs" on page 218. Viewing Statistics Viewing statistics can help you interpret performance based on configuration of an individual element of your storage solution, such as FC HBA, iSCSI Ethernet adapter, driver, SAN, or host operating system. The statistical information is useful to profile applications and their usage of a virtual disk, which can be used to determine if additional virtual disks would increase performance and what RAID level fits your needs. You can analyze the performance of the same application using different RAID levels to determine which level has the best performance. See Appendix B for more details on RAID levels. Note - The statistics are provided as general information for your use when analyzing system performance. They are not intended for benchmarking purposes but more so to accurately track your testing and to compare with benchmark testing. The rate statistics and cumulative statistics pages update at 60-second intervals and sampled rates become valid after two minutes. The real-time statistics page updates at 2-second intervals. Thus, real-time statistics give you an instant look at system performance, while rate and cumulative statistics average the performance numbers over a longer period. Statistics might not be accurate across events that alter virtual disks and volumes, including additions, deletions, and component failures. After such events, or if you are monitoring performance or changing how you are using volumes, you should reset the statistics; see "Resetting Statistics" on page 177. Chapter 5 Monitoring System Status 171