# Monitoring the space of user DASD groups

This topic describes the workspaces that report the status of user DASD groups space. This topic also describes the dialog boxes that you use to add, edit, delete, and migrate a user DASD volume group.

A user DASD group is a user-defined logical grouping of DASD volumes. Volumes within a user DASD group are typically related according to some criteria. You can define a user DASD group based on volume name, device address, SMS storage group, or one or more DASD volume attributes (for example, Fragmentation Index, Response Time, etc.). After you define a user DASD group, you can use the User DASD Group Performance and User DASD Group Space workspaces to view aggregated performance and space metrics for the group as a whole. From these two workspaces, you can drill down to other workspaces that display performance and space metrics for each volume in the group.

You can now dynamically allocate user DASD volume groups. This new feature of Tivoli OMEGAMON XE for Storage on z/OS Version 4.2.0 Interim Feature 2 replaces the functionality that was previously included in the Configuration Tool. User DASD groups are no longer defined within Configuration Tool. You access these workspaces through the User DASD Groups Space node in the Tivoli® Enterprise Portal

See Workspaces for general information on predefined workspaces and a list of all nodes that are included in the Tivoli OMEGAMON XE for Storage on z/OS product. Each node corresponds to a specific area of storage resource monitoring. And each node includes links to a unique set of storage resource workspaces. See Accessing workspaces to learn about navigating among workspaces. And see Integration with other products to learn about linking to the workspaces of other IBM Tivoli Monitoring products.

Note: User groups defined within the Configuration Tool are not visible in the Tivoli OMEGAMON XE for Storage on z/OS product unless they have been migrated. SeeMigrating user DASD group definitions for more information on how to migrate user DASD groups.

- Adding a user DASD group
  Use this dialog box to add a user DASD volume group.A volume is included in the group if it meets the criteria of at least one filter that is entered on the Volumes tab (if any are entered) and it meets the criteria of all filters that are entered on the Attributes tab.
- Editing a user DASD group
  Use this dialog box to edit a user DASD volume group.
- Migrating user DASD group definitions

## Navigating the workspaces of the User DASD Groups Space node

This section summarizes the workspace links that are available through the Navigator node. Depending on your monitoring goal, you follow a specific series of links to get detailed information about storage resources.

You start in the User DASD Groups Space node to navigate to the workspaces that you see in Table 1. You can access the workspaces in this table using the standard path and method for navigating workspaces.

Table 1. User DASD Groups Space node: bulleted list showing the hierarchy of linked workspaces
User DASD Groups Space User DASD Group Volume Space Dataset Space Summary Dataset Details Device Space Details User DASD Group Space Trend User DASD Group Volume Historical Space The following workspaces display the volumes that have the least favorable readings for the attribute within the User DASD Group: Lowest User DASD Group Volumes Free Space (Top 10) Lowest User DASD Group Volumes Free Space Percent (Top 10) Highest User DASD Group Volumes Fragmentation Index (Top 10)

## User DASD Groups Space workspace

This topic describes the main components of the principal workspace for this node.

The following sections describe various components of this workspace.

Views
  This workspace provides the following views. For a description of the attributes used as column headings in the workspace table view, review the attribute group definitions for this workspace in the online help. The help resource includes attribute descriptions that are displayed when you hover with the mouse pointer over a column heading.
  User DASD groups space table view

    The table view contains one row of data for each user DASD group. The view contains the following information:

    - The group name
    - The number of SMS and non-SMS volumes and the total number of volumes in the group
    - The status of the VTOC index
    - The lowest freespace percent of all volumes in the group
    - The highest fragmentation index of all volumes
    - The largest free extent
    - The total free space
    - The percentage of free space for the group and the total amount of space for the entire storage group
  User DASD groups with free space % < 10 bar graph
    This graph contains one bar for each user DASD group with a combined free space percentage that falls below 10%.
Workspaces that are linked to this workspace
  See Navigating the workspaces of the User DASD Groups Space node.

  Learn how to navigate among workspaces here: Accessing workspaces. Also see Integration with other products.

  See Workspaces for a list of all nodes provided in Tivoli OMEGAMON XE for Storage on z/OS.

## Summary information for the workspaces in this node

This section lists the views and related attribute groups for the workspaces of the User DASD Groups Space node.

See Workspaces for general information on predefined workspaces and a list of all nodes that are included in the Tivoli OMEGAMON XE for Storage on z/OS product. Each node corresponds to a specific area of storage resource monitoring. And each node includes links to a unique set of storage resource workspaces. See Accessing workspaces to learn about navigating among workspaces. And see Integration with other products to learn about linking to the workspaces of other IBM Tivoli Monitoring products.

See User DASD Groups Space workspace for more information on the primary workspace for this node.

User DASD Groups Space workspace
View | View type | Attribute group
User DASD Groups Space Report | TABLE | Volume Group Summary
User DASD Groups with Free Space % < 10 | BAR | Volume Group Summary

User DASD Group Volume Space workspace
View | View type | Attribute group
Volume Space Report | TABLE | DASD Volume Space
Volumes with Free Space % < 10 | BAR | DASD Volume Space
Volumes with Fragmentation Index > 650 | BAR | DASD Volume Space

User DASD Group Space Trend workspace
View | View type | Attribute group
User DASD Groups Space Trend Report | TABLE | Volume Group Summary
Megabytes of Free Space | BAR | Volume Group Summary

DFSMShsm™ Status workspace
View | View type | Attribute group
HSM Functions Status Report | TABLE | HSM Function Summary
Waiting Requests | BAR | HSM Function Summary
HSM Control Dataset Report | TABLE | HSM CDS
HSM Status Report | TABLE | HSM Status