# Defrag dialog box

You use this dialog box to issue the DFSMSdss™ DEFRAG command to defragment the volumes that you selected in the Tivoli® Enterprise Portal. To learn about the standard capabilities of a dialog box, see Standard tabs in the dialog boxes of the Storage Toolkit. The topic includes a link to the Reference guides for commands that are used in the Storage Toolkit.

The dialog box provides the following options:

- Exclude Datasets qualified by: You can add a qualifier to exclude data sets. Enter a fully-qualified name or pattern that identifies the data sets to exclude.
- Fragmentation Index: Specify an integer n. When fragmentation drops below the value of n, the defragmentation operation ends. The DFSMSdss facility places a decimal point before the value that you specify for n, as in these examples:
  - If you specify `1`, the value becomes `.1`.
  - If you specify `999`, the value becomes `.999`.
  - If you specify `001`, the value becomes `.001`.
- Fast Replication: Use the drop-down menu to set your preference for use of the DFSMSdss fast replication feature. If the Fast Replication option is blank (the default), fast replication is not enabled.
- Run as DFSMSdss Administrator: Select this option to cause the command to run with Administrator authorization in DFSMSdss. The user ID that you are using must be authorized as a storage administrator in DFSMSdss.
- Dynamic Allocation: Select this option to cause the command to use dynamic allocation for the affected data sets.
- Peer-To-Peer Remote Copy for FlashCopy®: Select this option to specify that a Peer-to-Peer Remote Copy (PPRC) primary volume is allowed to become a FlashCopy target volume. This option is ignored when FlashCopy is not used for defragmentation. RACF authorization might be required for this option.
- Consolidate: Select this option to enable the command to consolidate multiple extent data sets when possible.
- Write Check: Select this option to enable verification for the data moved by defragmentation. Verification increases the time required for the defragmentation operation.