HP XP P9000 for Compatible High Perf FICON Connectivity Software - Manual (Page 42)

Back-end performance
Function
The back-end transfer can be monitored. The back-end transfer is the number of data transfers
between the cache memory and the hard disk drive. The graph contains following information.
•
Cache to Drive
The number of data transfers from the cache memory to hard disk drives.
•
Drive to Cache Sequential
The number of data transfers from hard disk drives to the cache memory in sequential access
mode
•
Drive to Cache Random
The number of data transfers from hard disk drives to the cache memory in random access
mode
Storing period
Short-Range can be specified.
Selection of monitoring objects
Select monitoring objects in Performance Objects field. The combination of items is shown as
follows.
Item on right side of Monitor
Data field Item on left side of Monitor
Data field Item on right side of Object
field Item on left side of Object
field
Total Back Trans. (count/sec) None Logical Device*
Cache to Drive
Drive to Cache (Sequential)
Drive to Cache (Random)
Total Back Trans. (count/sec) None Parity Group*
Cache to Drive
Drive to Cache (Sequential)
Drive to Cache (Random)
Total Back Trans. (count/sec) None LUN*
Cache to Drive
Drive to Cache (Sequential)
Drive to Cache (Random)
* Volumes that do not accept I/O from the host, such as pool-VOLs, are not monitored.
Hard disk drive usage statistics
Function
The usage rates of the hard disk drive of each LDEV or parity group can be displayed.
42 Working with graphs