Figure 74 Storage Migration - Fujitsu ETERNUS DX100 S4 Design Manual

3. SAN Functions
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 short-
en the time for the stopped operation. This method is suitable for cases requiring continued host
access during the data migration.

Figure 74 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 devices can be specified and up to eight migration paths can be created
for each migration source device.
The capacity of a volume that is to be specified as the migration destination area must be larger
than the migration source volume capacity.
For online Storage Migration, the capacity of the migration destination volume must be the
•
same as the migration source volume.
For offline Storage Migration, stop server access to both the migration source volume and the
•
migration destination volume during a migration.
For online Storage Migration, stop server access to the migration source volume and the mi-
gration destination volume before starting a migration. In addition, do not access the migration
source volume from the server during a migration.
Online storage migration can be manually resumed on the following volumes after the process
•
(of deleting a copy session) is complete.
TPV/FTV capacity optimization is running
-
Flexible Tier Migration is running
-
- An Advanced Copy session exists
• For the migration destination device, the FC port mode needs to be switched to "Initiator" and
the port parameter also needs to be set.
• Make sure to delete the migration path after Storage Migration is complete.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
ETERNUS DX
FC
Storage Migration
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