Perform the following steps if you defined DASD volumes to belong to one storage group but you now want them to belong to a different storage group.

1. Display the Storage Group Application Selection panel (select option 6 from the ISMF Primary Option Menu for storage administrators).

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2. Supply values on the Storage Group Application Selection panel:

   CDS Name

   Is the name of the SCDS.

   Storage Group Name

   Is the name of the storage group.

   Option

   Select option 4, Volume.

   This displays the Storage Group Volume Selection panel.

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3. Supply values on the Storage Group Volume Selection panel:

   Specify a Single Volume (in Prefix), or Range of Volumes

   Type the serial numbers of the volumes you want to redefine.

   Option

   Select option 4, Delete.

   Press Enter to delete the volumes from their current storage group.

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4. Return to the Storage Group Application Selection panel.

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5. Supply values on the Storage Group Application Selection panel:

   Storage Group Name

   Is the name of the new storage group to contain the volumes.

   Option

   Select option 4, Volume. This returns you to the Storage Group Volume Selection panel.

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6. Supply values on the Storage Group Volume Selection panel:
   • Specify the volume serial numbers.
   • Select option 2 to define them to the storage group.

   Press Enter to process the values.

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7. Activate the updated configuration.

You are responsible for maintaining consistent physical connections. You must also be aware of multivolume data sets. In general, all of a multivolume data set must be in a single storage group (it is possible, when the primary storage group is stressed, for a multivolume data set to extend to more than one storage group). You must also maintain storage group, management class, and storage class consistency. If a data set has a management class with certain migration and backup attributes, and you redefine the volume containing that data set from one storage group to another, the new storage group might not be eligible for the same migration and backup processing.

You can also use the MVS SETSMS command to change the SMS status of volumes. Any SMS status that is changed by a SETSMS command is effective only until a new configuration is activated. The MVS status is not affected by either the SETSMS command or the activation of a new configuration. Only the SMS status is affected.