This checklist shows the sequence of tasks that you use to remove one or more disk units from an input/output adapter with built-in device parity protection. These tasks apply when the disk pools 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 restart your server to dedicated service tools (DST) mode to perform the tasks in this checklist.
Before you begin
Print a copy of this checklist. Check off the configuration tasks as you or the service representative perform them. This checklist provides an important record of your actions. It may help you diagnose any problems that occur.
| Task | What to do | Where to learn more |
|---|---|---|
| 1.___ | Display your current disk configuration. | Evaluate the current configuration |
| 2.___ | Calculate the space requirements for the disk pools that are involved in disk removal. | Calculate disk space requirements |
| 3.___ | Use option 21 from the Save menu to save your entire system. | Save your server with the GO SAVE command |
| 4.___ | Restart your server and select the option to use dedicated service tools (DST). | "How to Start Dedicated Service Tools (DST)"
in Backup and
Recovery  . From the taskpad in iSeries™ Navigator, select Open iSeries Navigator
Service Tools. |
| 5.___ | Remove disk units that you plan to remove from the system. | Move and remove disk units |
| 6.___ | Exclude the disk units from device parity protection. If you were successful in excluding the disk units, skip to task 8. Otherwise, continue to task 7. | Exclude disk units from a parity set |
| 7.___ | Stop device parity protection for all the disk units in the IOP. | Stop device parity protection |
| 8.___ | Physically remove disk units. If you stopped device parity protection in task 7, continue with task 9. If you did not stop device parity protection, skip to task 10. | Move and remove disk units |
| 9.___ | Start device parity protection again. | Start device parity protection |
| 10.___ | Verify that your disk unit configuration is correct. | Evaluate the current configuration |
| 11.___ | Print your disk configuration to have available in case a recovery situation occurs. | Print your disk configuration |
| 12.___ | Restart your server. | Â |