Tape Spanning; Replication And Tape Attach - HP D2D Manual

If it is over 400 GB, the cartridge Max Size is set to 800 GB.
If it is over 800 GB, the cartridge Max Size is set to 1.6 TB.
Cartridges over 1.6 TB are not writable.
The Used Size is always reported correctly.

Tape spanning

Spanning of multiple physical cartridges from a single cartridge in the HP D2D Backup System is
not supported. The data from the cartridge on the HP D2D Backup System must not exceed the
capacity of the physical cartridge on the attached tape storage device. Data from only one cartridge
on the HP D2D Backup System can be copied or exported at a time; it is not possible to select
multiple slots and copy them to a single physical cartridge.

Replication and Tape Attach

Tape Attach is particularly useful in two instances, if you have installed the optional replication
license and are replicating Virtual Tape Libraries:
1. The first synchronization of the cartridges will require significant bandwidth. To minimize the
impact on network traffic, you can use the Library or Tape Attach Copy functionality to create
a physical cartridge that can be shipped to the site of the Target Appliance and imported.
This process is known as seeding.
2. The same applies in reverse, if you need to recover a Source Appliance from a Target cartridge.
Because it is a function of the Web Management Interface, copy to tape for disaster recovery
purposes can occur at the replication Target Appliance in the Data Center without the need for
any involvement from hosts on remote sites. All scheduling and processing becomes a Back Office
task. Similarly, it provides an efficient option for replicating the first instance of data, which contains
the full backup, onto the Target Appliance without placing any load on network bandwidth.
(Deduplication ensures that subsequent replication tasks do not place much load on network
bandwidth.)
Figure 19 Replication and Tape attach
Seeding Virtual Tape Devices using Tape Attach
Use the Library or Tape Attach Copy functionality to create a physical cartridge that can be shipped
to the site of the Target Appliance and imported. You only need to seed with one full backup.
1. Host backs up to a Non Replicating library on the Source Appliance.
2. The first full backup is copied to a cartridge on a Tape Library.
3. The physical cartridge is shipped to the Data Center.
4. The first full backup is imported from Tape Library into a Non-Replicating Library on the Target
Appliance. It is also possible to import the cartridge into an unmapped slot of an existing
Replication-Target library.
5. Once imported create the replication linkage between Source and Target Appliances and
configure slot mappings.
46 Tape Attach information for G1 products