Predefined reports about disks You can run predefined reports to analyze the capacity of disks and performance of local disks. Running the Disks Capacity reportRun the Disks Capacity report to see information about the capacity of disks on storage systems.Disks Capacity reportShows a chart of the disk classes with the most allocated space, and a table with space statistics for all disks by class. Use the report to review space allocation in your disks.Running the Most Active Disks reportTo see which local disks that are on storage systems are the most active, use the Most Active Disks report. This report shows information only for SAN Volume Controller and Storwize® V7000 storage systems.Most Active Disks reportShows a chart of the 20 local disks that are most active, and details for all local disks, for a time period that you specify. Use the report to analyze the performance of local disks.Running the Performance of One Disk reportTo see performance metrics for a local disk on a storage system, use the Performance of One Disk report. Performance of One Disk reportShows four charts, and a table of performance metrics for a local disk over a time period. Use the report to analyze the performance of a local disk.Running the Compare Performance of Multiple Disks reportUse the Compare Performance of Multiple Disks report to compare up to four performance metrics for multiple local disks that are on storage systems. You can view reports about local disks on SAN Volume Controller, Storwize® V7000, Storwize® V7000 Unified, and Storwize® V3700 systems. For example, you can compare cache percentages, data rates, and I/O rates.Compare Performance of Multiple Disks reportShows up to four performance metrics for multiple local disks over time. Use the report to compare the performance metrics for local disks that are on storage systems.Parent topic: Predefined reports about storage systems and components