HP XP Performance Advisor Software - Manual (Page 360)

NOTE: The backend transfer is the block of data that is transferred between the XP/XP7 disk
array cache and the RAID groups. Every read cache miss results in a backend transfer.
Following is a sample Findings section for an XP7 disk array:
A sample of each report is given below:
Total I/O Rate report
The Total I/O Rate report displays in a chart format, the number of total read and write I/O
operations over the entire period.
“Total I/O Rate” (page 361) displays a sample Total I/O Rate
report for the P9500 Disk Array.
360 Sample reports