Table of Contents
Advertisement
most recent backups in the media database may not have been fully replicated and thus may
not be usable for restore.)
Figure 57 Data Recovery from the Target VLS
1.
The source VLS becomes inaccessible to the remote VLS and to the backup host.
2.
The source tape library and drive are deleted from the backup host (cartridge media pools
remain).
3.
The target VLS is enabled using the VLS LUN mapping feature in the GUI.
4.
The backup application server configures the target library and tape drives and performs a
barcode scan.
5.
The backup application recognizes data cartridges within the new library.
6.
Data is restored using target cartridges (unknown to the backup application) where the most
recent backup is forward referenced.
Restore the VLS over the LAN/WAN
Another method of recovery is to restore the backups over the WAN/LAN from the target device
back to a rebuilt source device. The restore over WAN/LAN can be initiated from the source
device in the "Restore Media" task in LAN/WAN destination library slots, where you can then
select which target cartridges you want to restore back to their matching cartridges on the source
device.
The LAN/WAN restore is a whole cartridge non-deduplicated copy so the entire contents of the
cartridge are read back over the LAN/WAN, and the resulting restored cartridges on the source
device will never deduplicate against any other cartridges on the device (until they are recycled
and then overwritten with new backups). Given this, you would be limited by the bandwidth of
the replication link in terms of how much data can be restored, and so generally you would restore
the cartridges containing the last full backup and any incremental backups after this point. These
can then be used by the backup application to import/restore from the source device's virtual
library to replacement servers.
122 Replication
Advertisement
Table of Contents
