Hewlett-Packard StorageWorks 12000 - Virtual Library System EVA Gateway Manual
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Brand: HP
Category: Power Supply , Storage
Type: Manual
Model: HP 6000 - Officejet Wireless Color Inkjet Printer , HP StorageWorks 12000 - Virtual Library System EVA Gateway , HP StorageWorks 9000 Virtual Libr
Pages: 218 (10.09 Mb)
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With reverse replication the deduplication store at the source has to be repopulated again from the
beginning so reverse replication will take longer than “normal replication” after initialization. After
reverse replication, the normal source to target relationship is reestablished automatically. Further
replication will take place from source to target in the normal manner.
It is also possible to reverse the replication even if the target D2D system has lost the mapping. This
is the case if a source library is accidentally deleted. Recovery is similar to the above except that only
the replication wizard will be available. The recover first mapping tick boxes have to be manually
‘ticked’ for each tape which is required to be reverse replicated.
Reverse Tape Initialization on the D2D
A third method is also available. At the data center, copy the tape contents required at remote site
C directly onto physical tape using the tape offload functionality within HP D2D Backup Systems.
Typically these tapes would be the last fully synchronized full backup and any incrementals required.
These tapes can then be transported to remote site C along with the tape library they were prepared
on (if necessary). Importing the tapes back onto a brand new replacement D2D2500 at remote site
C effectively initializes the deduplication store at remote site C and the required data can be recovered
from the replacement D2D device. The data transferred on the physical tapes is in 100% backup
application format. When it is imported into the replacement D2D at remote site C, the import process
of reading the physical tape regenerates all the necessary hash codes and the deduplication store at
remote site C. The data can even be recovered directly from the physical tapes at remote site C if
required; this is exactly the same process as tape initialization.
D2D Systems98