Removing disk units that have device parity protection from a disk pool without mirrored protection

 

This checklist shows the sequence of tasks that you use to remove one or more disk units from an IOA 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 system to dedicated service tools (DST) mode to perform the tasks in this checklist.

When you perform the tasks in this checklist, the system moves large amounts of data. Make sure that you have completely saved your system in the event that you need to recover from an error situation.

 

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.

Most tasks in the checklist include links to other topics. Refer to these topics if you need more information about how to perform a particular task.

Task	What to do	Where to learn more
1.___	Display your current disk configuration.	Evaluating the current configuration
2.___	Calculate the space requirements for the disk pools that are involved in disk removal.	Calculating disk space requirements
3.___	Use option 21 from the Save menu to save your entire system.	Save your system with the GO SAVE command
4.___	Restart your system 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 OpeniSeries Navigator Service Tools.
5.___	Remove disk units that you plan to remove from the system.	Moving and removing 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.	Excluding disk units from a parity set
7.___	Stop device parity protection for all the disk units in the Input/Output Processor (IOP).	Stopping 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.	Moving and removing disk units
9.___	Start device parity protection again.	Starting device parity protection
10.___	Verify that your disk unit configuration is correct.	Evaluating the current configuration
11.___	Print your disk configuration to have available in case a recovery situation occurs.	Printing your disk configuration
12.___	Restart your system.

 

Parent topic:

Disk protection checklists