RAID 10 IOA migration

There are considerations and limitations when you migrate to a new class of IOA.

Before you begin the migration to the new IOA, as with any configuration change, it is important to do a normal system power down. The power down assures that all of your cache data is written to disk before the power down completes.

When you migrate to a new class of IOA, device parity protection might need to be rebuilt. During the rebuild of device parity protection, disk units are not protected.

Important: Because your disk units are not protected by RAID during a migration, it is necessary to perform a save.

You cannot migrate a parity set to adapters of a previous class of IOA after you migrated to a new adapter. You cannot migrate a parity set to the old generation of adapters and keep the data intact. This action requires a save and restore of disk unit data to prevent data loss. To migrate between RAID 5, RAID 6, or RAID 10 protection, you must stop and restart the device parity protection.

Note: You cannot migrate RAID 10 protected disk units to an adapter that does not support RAID 10.