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Analyzing DASD

The DASD Analysis options provide you with the tools that you need to manage storage resources (such as storage groups, pools, RAID physical disks, user volumes, DASD directors, subsystems, and other resources) for optimum space utilization, configuration, and performance.

You can drill down from each resource to a data set or volume.

The DASD Analysis options from which you can choose are divided into the following categories:

  • Configuration

    You can select a DASD resource, such as storage groups and pools, volumes, RAID physical disks, or subsystems. MainView SRM Reporting displays a view that shows real-time configuration information about all resources of that type; for example, a listing of all storage groups and pools along with the number of volumes and data sets within each pool, the size of each pool, and other data.

  • Space utilization

    You can select a DASD type, such as applications, subsystems, or RAID physicals and MainView SRM Reporting displays a view showing information about how your enterprise is using each resource of that type; for example, which applications are currently using the most DASD space. Information on the utilization of VTOCs, VTOC indexes, and VVDS data sets is available, as well as space utilization by DSORG, SMS status, and a number of other storage attributes. Suboptions are available that provide you with access to real-time data, historical data, or historical trending information on almost any resource.

  • Performance

    You can view either historical storage performance or real-time performance statistics. Select a resource such as channel activity, physical disks, or subsystems. MainView SRM Reporting displays a view showing detailed performance information about all resources of that type (for example, response time of each volume).

  • Data set management

    You can generate a report on data sets at the system-wide level, at a single resource level, or at the level of any subset of volumes, storage groups, or other resource that are specified in a VTOC Scan facility. Choose data sets using criteria such as high-level qualifier, age, size, and percentage used. Using the information in the report, you can prevent potential problems; for example, you can identify candidates for migration and then issue the HMIGRATE command to relieve space constraints.

  • Group and pool analysis

    You can view space utilization, performance data, configuration information, and data set analysis reports for the storage groups and pools in your enterprise. Select a pool and drill down to perform even more detailed historical or in real time analysis on a specific storage group or pool. Use the information in these views to anticipate and prevent out-of-space conditions or correct problems that cause slow response times. You can also view summary reports of the data sets within the storage groups and pools using properties such as data set size and age.

  • Volume analysis

    Using Volume Management reports, you can locate disabled and quiesced volumes in the enterprise. Volume Space reports help you accomplish tasks such as locating over-allocated volumes and volumes with allocated but unused space.

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