Checklist 9: Removing disk units that have device parity protection from an auxiliary storage pools without mirrored protection
Use this checklist to perform a sequence of tasks to remove one or more disk units from an input/output adapter (IOA). These tasks apply when the auxiliary storage pools (ASPs) containing the disk units do not have mirrored protection and when device parity protection is started for the IOA.
Use these tasks when you are permanently removing disk units from your system. Do not use these tasks when your are repairing or replacing a failed hard disk. You must stop your system and use dedicated service tools (DST) to perform the tasks in this checklist.
Before you begin, make a copy of this checklist. Complete the appropriate areas as you or the service representative perform the configuration tasks. This checklist provides an important record of your actions. It might help you diagnose any problems that occur.
Most tasks in the checklist include references to other topics in this document. Refer to these topics if you need more information about how to perform a particular task.
| Task | What to do | Where to read more about it |
|---|---|---|
| ___ Task 1 | Print your current disk configuration. | Displaying your disk configuration. |
| ___ Task 2 | Calculate the space requirements for the ASPs that are involved in removing disk units. | Calculating space requirements for an auxiliary storage pool. |
| ___ Task 3 | Use option 21 from the Save menu to save your entire system. | |
| ___ Task 4 | Start DST. | Starting dedicated service tools. |
| ___ Task 5 | Remove disk units that you plan to remove from the system. | Removing a disk unit from an auxiliary storage pool. |
| ___ Task 6 | Exclude the disk units from device parity protection. If you were successful in excluding the disk units, skip to task 8. Otherwise, continue with task 7. | Excluding a disk unit from device parity protection. |
| ___ Task 7 | Stop device parity protection for the IOA. | Stopping device parity protection on an input/output adapter. |
| ___ Task 8 | Power off the system and remove the disk units. | Removing disk units that have device parity protection for System i while powered on. Removing disk units that have device parity protection for System i while powered off. Removing disk units that have device parity protection for a IBM i. . |
| ___ Task 9 | Start device parity protection for the IOA. | Starting device parity protection for an input/output adapter. |
| ___ Task 10 | Verify that your disk configuration is correct and print a copy for your records. | Displaying your disk configuration. |
| ___ Task 11 | End DST. | Stopping dedicated service tools. |