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2. Basic Functions
Data Migration
Data Migration
Storage Migration
Storage Migration is a function that migrates the volume data from an old storage system to volumes in a new
storage system without using a host in cases such as when replacing a storage system.
The migration source storage system and migration destination ETERNUS AF are connected using FC cables. Data
read from the target volume in the migration source is written to the migration destination volume in the
ETERNUS AF.
Since Storage Migration is controlled by ETERNUS AF controllers, no additional software is required.
The connection interface is FC. In addition, the direct connection and switch connection topologies are
supported.
Online Storage Migration and offline Storage Migration are supported.
Offline method
•
Stop the server during the data migration. Host access becomes available after the data migration to the
migration destination volume is complete. Therefore, this method prevents host access from affecting the
ETERNUS AF and can shorten the time of the migration. This method is suitable for cases requiring quick data
migration.
•
Online method
Host access becomes available after the data migration to the migration destination volume starts. Operations
can be performed during the data migration. Therefore, this method can shorten the time for the stopped
operation. This method is suitable for cases requiring continued host access during the data migration.
Figure 67
Storage Migration
The source storage system
The Storage Migration function migrates whole volumes at the block level. A data migration can be started by
specifying a text file with migration information that is described in a dedicated format from ETERNUS Web GUI.
The path between the migration source and the migration destination is called a migration path. The maximum
number of migration volumes for each migration path is 512.
Up to 16 migration source storage systems can be specified and up to eight migration paths can be created for
each migration source storage system.
The capacity of a volume that is to be specified as the migration destination area must be larger than the
migration source volume capacity.
ETERNUS AF
FC
Storage Migration
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