Learn how to add additional disk units to an existing SVC configuration (including configurations using IBM FlashSystems or IBM Storwize storage devices)
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4. If the configuration contains FlashCopy, end the active FlashCopy with the ENDSVCSSN command.
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Important: After running ENDSVCSSN for a FlashCopy session, disk units in a FlashCopy IASP become non-configured disk units on IBM i. You can no longer use data in a FlashCopy IASP on the target node until a new FlashCopy is started. |
5. If the configuration contains either Metro Mirror or Global Mirror configure replication set up the target SVC storage controller and IBM i.
| Expand |
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| title | Configure Metro Mirror or Global Mirror Replication |
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Create the new disk units on the target SVC storage controller. Create the remote copy relationship.
| Warning |
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Important: Ensure that when creating the relationship not to check the box indicating that the volumes are already synchronized |
3. Start the remote copy relationship.
4. Wait for the remote copy relationship state to be either ‘Consistent Copying’ or ‘Consistent Synchronized’ depending on the configuration.
5. Add the remote copy relationship to the existing remote copy consistency group used by the environment. | Info |
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The remote copy consistency group name can be seen on the Display SVC Session (DSPSVCSSN) display. |
6. Assign these new disk units on the target SVC storage controller to the target IBM i. |
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7. Update the source copy description using the Change SVC Copy Description (CHGSVCCPYD) command.
| Tip |
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Tip:The joblog for the command will contain the following diagnostic message:
Message . . . . : The quantity of logical units does not match.
Cause . . . . . : The quantity of logical units specified in auxiliary
storage pool (ASP) copy description &1 does not match the quantity of
logical untis specified in ASP copy description &2. All operations
performed on ASP session &3 will fail until the quantity of logical units in
both ASP copy descriptions match.
Recovery . . . : Update the quantity of logical units in one or both ASP
copy descriptions. Step 8 updates the second copy description to resolve this. |
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