Create An Ldev Io Report; About Ldev Activity Report - HPE XP7 User Manual

LDEV IO mapping information. The busiest LDEVs are displayed at different ranks in a tabular format. For
more information, see Create an LDEV IO report.

Create an LDEV IO report

Procedure
1. Select LDEV IO from the Report Type list.
2. Select the LDEVs and the RAID Groups based on the Frontend I/Os and Backend transfers from the
following lists:
• LDEVs from the FrontEnd LDEVs list
• LDEVs from the BackEnd LDEVs list
• Frontend RAID Groups from the RG(s) list
• Backend RAID Groups from the RG(s) list
NOTE: By default, Array Performance report is populated in the Report Type field in the Create
Reports page. Click on it again to remove it from selection.

About LDEV Activity report

You can view the maximum and least busiest LDEVs in an XP or an XP7 disk array through the LDEV
Activity report. The LDEV data can be for one of the following metric types:
• FontEndIO
• BackEndIO
• MB
• Utilization
• Read Response Time
• Write Response Time
The maximum and least busiest LDEVs are collated based on the maximum and minimum threshold
levels you specify, and also the metric type that you select. For the metric type and duration that you
specify, the average of the total performance of each LDEV is considered. Further, the average value is
verified with the set threshold levels to see if that particular LDEV's performance is above or below the
threshold limit. Based on their average values, the LDEVs are grouped in the top 100 busiest or the least
100 busiest LDEVs, and displayed in the CSV file. It implies that only those LDEVs that are above the
maximum and below the minimum set threshold limits are considered. The associated driver type is also
displayed for each LDEV. This information helps you to identify if the associated drive is supporting the
required LDEV performance. If not, move the LDEV to a different drive type.
Create an LDEV IO report 271