HP XP Array Manager Software - Manual (Page 65)

Transfer rate for parity groups and external volume groups (When the Subsystem folder is selected):
Transfer rate for parity groups or external volume groups (When the Box 1 folder is selected):
Transfer rate for volumes:
Note: It is possible that the transfer rate for a parity group or an external volume group is not equal to
the sum of the transfer rate for each volume in that group. This is because the Auto LUN window omits
fractions below the decimal point when displaying the transfer rate for each volume.
Note : If there is no volume in a parity group, hyphens (-) are displayed in place of performance
statistics on a parity group.
Figure 31 Transfer Rates for Disks
The list displays the following:
• : When the green checkmark icon is displayed on the left of an item, the graph displays
workload statistics about the parity group, the external volume group, or the volume.
• PG: Indicates the parity group ID or the external volume group ID. If the ID starts with the letter E,
the group is an external volume group.
• LDEV: Indicates the volume ID. If the ID ends with the symbol #, the volume is a an external volume.
• Emulation: Indicates the emulation type.
• Trans.: Indicates the size (in megabytes) of data transferred to the parity group, the external
volume group, or the volume per second.
• Read Hit: Indicates the read hit ratio.
• Write Hit: Indicates the write hit ratio.
• Back Trans.: Indicates the number of data transfers per second between the parity group (or the
external volume group, or the volume) and the cache memory.
• Response Time: This column indicates the time for replying from the parity group, the external
volume group, or the volume when I/O accesses are made from the host to them. The unit is
milliseconds. The average response time in the period specified at Monitoring Term is displayed.
Notes:
• For mainframe volume or the parity groups that contain mainframe volumes, the values of
Response Time are always 0.
• This column displays a hyphen (-) if the I/O rate is 0 (zero).
• CLPR: This column indicates numbers and names of CLPRs corresponding to each parity group,
external volume group, or volume in the format CLPR-number:CLPR-name. For details on CLPRs,
see HP StorageWorks XP24000 Disk/Cache Partition User’s Guide.
XP24000 Performance Monitor User's Guide 65