Adding disk units to an existing auxiliary storage pool

Use this information to add disk units to an existing auxiliary storage pool (ASP).

Do things in the right sequence:

If you want to have device parity protection for the disks that you are adding, you should start device parity protection before you add the disk units to an ASP.
If you do not want to have device parity protection for the disks that you are adding, you should initialize and format the disk units before you add them to an ASP.
If you have more than one ASP on your system, you should plan how you want to add the new disk units before you begin this procedure.

When you (or your service representative) physically attach a new disk unit to your system, the status of the new disk unit is nonconfigured. Nonconfigured status means that a disk unit has not yet been assigned to an ASP on the system. You can assign disk units to an existing ASP. You create a new ASP by assigning disk units to it.

To assign nonconfigured disk units to an ASP, follow these steps:

From the Use Dedicated Service Tools (DST) menu, follow these steps:
1. On the Use Dedicated Service Tools (DST) display, select Work with disk units.
2. On the Work with Disk Units display, select Work with disk configuration.
3. On the Work with Disk Configuration display, select Work with ASP configuration.
4. On the Work with ASP Configuration display, select Add units to ASPs and balance data.
or from the System Service Tools (SST) menu, follow these steps:
1. On the System Service Tools (SST) display, select Work with disk units.
2. On the Work with Disk Units display, select Work with disk configuration.
3. On the Work with Disk Configuration display, select Add units to ASPs and balance data.

On the Add Units to ASP and Balance Data display, select Add units to existing ASPs and Balance Data.

                Add Units to ASPs and Balance Data

Select one of the following:

   1. Create unencrypted ASPs
   2. Create encrypted ASPs
   3. Add units to existing ASPs and Balance data

On the Specify ASPs to Add Units to display, enter the ASP number (1 through 255) for each disk unit that needs to be added to an existing ASP. This display lists all the disk units that are not configured.

                       Specify ASPs to Add Units to

   Specify the existing ASP to add each unit to.

Specify  Serial                             Resource
  ASP    Number      Type  Model  Capacity  Name 
  1      21-6C597    4327   050      70564  DD007
  1      50-128840F  2107   A84      70564  DD004
  1      50-128940F  2107   A84      70564  DD005
  2      50-128A40F  2107   A85      35165  DD011
         50-128B40F  2107   A85      35165  DD003
         68-0C8BA12  6717   050       8589  DD008
         68-0C9D209  6717   050       8589  DD009
         68-606E0    6718   050      17548  DD006
         68-0CDAB10  6718   050      17548  DD010 
         21-05348    4327   050      70564  DD012
         21-05322    4327   050      70564  DD013


F3=Exit     F5=Refresh     F11=Display disk configuration capacity 
F12=Cancel

Note: If you are performing a complete system restore, all the disk units on the system might not report in right away. Verify that the number of disk units displayed matches the number of disk units physically attached to the system. If they do not match, wait a few minutes and press F5 (Refresh) until all of the disk units report in.

If you require more than one ASP, type an ASP number next to each disk unit that you want to configure.
Number 1 is reserved for the system ASP. You can enter a number from 2 to 255. Numbers 33 to 255 are reserved for independent ASPs.
After you complete all units, press Enter.

The Confirm Add Units and Balance Data display shows what the entire system configuration will be when you add the units. Verify this configuration against your planned configuration.

                     Confirm Add Units and Balance Data  

Add will take several minutes for each unit.  The system will 
have the displayed protection after the unit(s) are added.   

Press Enter=Confirm Add units and Balance data. 
Press F9=Capacity Information to display the resulting capacity.
Press F10=Confirm Add and Balance data.
Press F12=Cancel to return and change your choice. 

            Serial                  Resource 
ASP  Unit   Number      Type Model  Name       Protection
  1                                            Unprotected 
        1   68-0CDAB35  6718  050   DD001      Unprotected
        3   21-6C597    4327  050   DD007      Unprotected 
        4   50-128840F  2107  A84   DD004      Unprotected 
        5   50-128940F  2107  A84   DD005      Unprotected
  2                                            Unprotected 
        2   50-100240F  2107  A82   DD002      Unprotected 
        6   50-128A40F  2107  A85   DD011      Unprotected   

F9=Resulting Capacity              F10=Add and Balance  
F11=Display Encryption Status      F12=Cancel

You can press F9 (Resulting capacity) to see how the change will affect your disk utilization.

You are shown the Resulting Capacity display:

                              Resulting Capacity   
The configuration change that you requested would result in the
 following ASP capacities.   

Press Enter to continue.
                -----------Current----------  ----------Proposed----------
                --Protected--  -Unprotected-  --Protected--  -Unprotected- 
ASP  Threshold    Size  %Used    Size  %Used   Size  %Used   Size    %used 
  1      90%         0  0.00%    70564 23.98%     0  0.00%   211692  8.00% 
  2      90%         0  0.00%    35165 00.00%     0  0.00%    70330  0.00%

Press Enter or F12 (Cancel) to return to the Confirm Add Units display.

Press Enter or F10 to confirm the selected disk units. If you want to make changes, press F12 to return to step 3
- If you press Enter, and you selected the option to balance data in step 1, the system will balance the data in the ASP and move data to the newly added disk units.
- If you press F10, the system will balance the data in the ASP and move data to the newly added disk units.
Adding units can take from several minutes to several hours. During that time, you are shown the Function Status display.
```
                                Function Status   

You selected to add units. 





                                     5 % Complete   
```
The system updates the display periodically.
Note: You can press F16 to return to the Use Dedicated Service Tools (DST) menu if you have other tasks to perform. However, you cannot perform any disk configuration tasks or end DST until the system has finished adding disk units.

The time it takes the system to add units depends on the type, model, and size of each unit being added and the ability of the system to do multiple adds at the same time.
If you have no other tasks to perform, end DST or SST.