Adding disk units without disk protection

 

This checklist shows the sequence of tasks that you use to configure disks on a new system. Whether you need to perform all the tasks depends on the disk protection that you want on your system.

Disk protection provides more information about the disk protection that is available.

 

Disk pools with mirrored protection

You can add disk units to a disk pool that has mirrored protection without stopping and starting mirrored protection. You must add disk units in pairs with equal capacities. The added disk units will always be paired with each other. You might want to choose a later time, when your system can be unavailable for several hours, to stop and start mirrored protection. When you start mirrored protection again, the system evaluates the pairing for all disk units on your system. This might provide a higher level of availability for failures that affect an Input/Output Adapter (IOA), an Input/Output Processor (IOP), or a bus.

 

Attention

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 perform them. 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. 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.___	Use the Disk Unit Graphical View window to find empty slots for the disk units you want to install.	Evaluating the current configuration
2.___	Right-click an empty slot and start the Install Disk Unit wizard to guide you through the process.
3.___	Use the Add Disk Unit wizard to add non-configured disks to existing or new disk pools. You will have the option to start compression or to add disk units of equal capacity to mirror-protected disk pools if disks are available for these actions.	Adding a disk unit or disk pool
4.___	Change the storage threshold for any disk pool if required. The default storage threshold for each disk pool is 90%.	Setting the threshold of a disk pool
5.___	If you chose to create protected disk pools and you included pairs of disk units to be mirrored, you might want to restart to the dedicated service tools (DST) mode and start mirroring for those disk pools now.	Starting mirrored protection
6.___	If you started mirrored protection for the system disk pool or for a basic disk pool, wait until your system completely restarts.
7.___	Verify that your disk configuration is correct.	Evaluating the current configuration
8.___	Print your disk configuration to have available in case a recovery situation occurs.	Printing your disk configuration

 

Parent topic:

Disk protection checklists