HP StorageWorks XP Performance Advisor Software v4.6 User and Troubleshooting Guide (T1789-96094, June 2010)

Total I/O Rate Detail report
The Total I/O Rate Detail report shows in a chart format, the number of Sequential IO/s, Random
IO/s, and CFW IO operations, over the entire period. “Total I/O Rate Detail” on page 328 shows a
sample Total I/O Rate Detail report for XP1024.
Figure 28 Total I/O Rate Detail
.
The sequential frontend IO/s are when data is read from or written to consecutive addresses. The
random frontend IO/s are when applications address non-consecutive blocks of data. CFWs are a
special class of IO/s generated by HP's XP Continuous Access remote mirroring software.
NOTE:
If there are no data points available for the dates selected, blank chart be displayed. If all the data
values are zero for the dates selected, a chart with a horizontal line along X axis be displayed in the
center.
Read/Write Ratio report
The Read/Write Ratio report shows in a chart format, the ratio of read activity to write activity, over
the entire period. This is for both sequential and random read/write activity. “Read/Write
Ratio” on page 329 shows a sample Read/Write Ratio report for XP1024.
Appendix B328