Migrating an existing disk array to a new RAID level

The SAS RAID controller supports migrating an existing RAID 0 or 10 disk array to RAID 10 or 0, respectively. This allows you to dynamically change the level of protection of a disk array while preserving its existing data.

When migrating RAID 0 to RAID 10, additional disks must be included into the RAID 10 disk array in order to provide the additional level of protection. The number of additional disks will be equal to the number of disks in the original RAID 0 disk array. The capacity of the disk array will remain unchanged and the disk array remains accessible during the migration. The disk array is not protected by RAID 10 until the migration completes.

When migrating RAID 10 to RAID 0, no additional disks are included into the RAID 0 disk array. The number of disks in the resulting RAID 0 disk array will be reduced to half the number of disks in the original RAID 10 disk array. The capacity of the disk array will remain unchanged and the disk array remains accessible during the migration.

To migrate an existing array to a new level, do the following:

Run the iprconfig utility by typing iprconfig.
Select Work with disk arrays.
Select Migrate disk array protection.
Select the disk array to which you want to migrate the disk array protection level.

Press c and use up arrow and down arrow keys to change the protection level, and press Enter. A screen will display similar to the following:

+------------------------------------------------------------------------------+ 

|                            Select Protection Level                           | 

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| Current RAID protection level is shown.  To change                           | 

| setting hit "c" for options menu.  Highlight desired                         | 

| option then hit Enter                                                        | 

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| c=Change Setting                                                             | 

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|/dev/sdf - Protection Level . . . . . . :   RAID 0                            | 

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|Press Enter to Continue                                                       | 

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|e=Exit   q=Cancel                                                             | 

+------------------------------------------------------------------------------+

Optional: If more member disks are required, for example when migrating from RAID 0 to 10, move the cursor by using the up arrow and down arrow keys at the list of candidate disks, and press 1 to select the desired disks. When you have completed your disk selection, press Enter. A screen will display similar to the following:

+------------------------------------------------------------------------------+ 

|                         Select Disk Units for Migration                      | 

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|A minimum of 2 disks must be selected.                                        | 

|A maximum of 2 disks must be selected.                                        | 

|The number of disks selected must be a multiple of 2.                         | 

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|OPT Name   PCI/SCSI Location          Vendor   Product ID       Status        | 

|--- ------ -------------------------- -------- ---------------- --------------| 

| 1  sg12   0003:00:01.0/2:0:2:0       IBM      HUS151473VLS300  Active        | 

| 1  sg13   0003:00:01.0/2:0:3:0       IBM      HUS151473VLS300  Active        | 

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|e=Exit   q=Cancel   t=Toggle                                                  | 

+------------------------------------------------------------------------------+

Optional: If fewer member disks are needed, for example when migrating from RAID 10 to RAID 0, the adapter will select the extra disks and take them out of the disk array automatically. No user intervention is needed.
Press Enter to confirm the RAID migration.
The migration between different RAID levels takes anywhere from several seconds to several hours. A progress screen displays the migration progress. Migration progress can also be found in the Display Disk Array Status screen and Display Hardware Status screen.

Last updated: Wed, May 24, 2017