Fujitsu ETERNUS CS800 S6, User Manual

Page: 370 / 561

11.4 Receive VTL
The partition and its cartridges are recovered on the target system. All data stored on
the partition at the time the snapshot was saved is available.
After recovering the partition, you must add tape drives to the partition. The tape drive
type must be identical to the original partition so that the media is compatible. In
addition, you must map the devices before the VTL partition is accessible.
If the partition contains media, you will only be able to select the highest capacity tape
drive for that media type. For example, if the partition contains SDLT600 tape cartridges,
you will only be able to select DLT-S4 tape drives when mapping devices to the recovered
partition.
When a VTL partition is recovered on a target system, a new serial number is
created for the partition.
After you recover a partition, if you want to continue backing up data to the
partition, you must remap your backup application to point to the target system
instead of the source system.
Performing a Failback For a Partition
Perform a failback of a VTL partition if a source system that was previously unavailable
becomes available again. When you failback a partition, you select a received snapshot.
The ETERNUS CS800 copies the snapshot from the target system back to the source system.
You can then perform a recover operation to recreate the partition on the source system
just as it was at the point in time when the snapshot was saved.
Before you can failback a partition, on the original source system, you must add
the original target system to the list of allowed replication sources (see
"Adding
a Replication Source" on page 259 ). This is because, during failback, the original
target is acting as a source when it sends a snapshot to the original source.
1. To perform a partition failback:
On the target system, select a snapshot in the Snapshots List and click Failback .
The Failback Target page displays (see "Failback Target Page" on page 371 ).
ETERNUS CS800 370