Data migration options

Your system administrator must select the data migration method that is the best compromise between efficiency and effect on your storage users. You must consider remapping, drive reformatting, and partitioning when you replace existing storage.

When you replace existing storage, take note of the following considerations:
  • You can partition the storage so that its virtual disks are similar in configuration to the drives that they are replacing.
  • New configurations must be large enough to accommodate the existing data.
  • When data is moved, the data must be in a certain state, which typically requires an interruption in updates or changes while the movement occurs. Depending on the amount of data and the migration method, data unavailability can result for up to several hours.
Note: You can take advantage of this opportunity to do some remapping. A one-to-one relationship between the allocation and distribution of data is not required, although it is allowed. For example, you can take advantage of using a maximum of 255 logical subsystems.