HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 107

WAN Initialization, case where you may need to override tape initialization for example

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below. This option prompts you to select from the available "SAN Destination Library" devices to use for the tape export: The tape export will stack the virtual cartridges to replicate (the cartridges that contain the full backup) onto the available physical tapes in the selected SAN destination library. The tape export GUI will show the export status to the tape handler to determine which physical tapes are ready for removal, whether new tapes need to be loaded, etc. The format of these export/import tapes is unique via this process and associated with the physical tapes is a catalog which is sent over the WAN to the remote site as soon as the tapes are produced. On the subsequent import at the target site, the tape stack is read into the VLS and referenced using the catalog that was sent via the WAN. You must plug an HP Fibre Channel-attached tape library into the storage ports of the target device and add it as a "SAN Destination Library." Then you can run the "Import Tapes" task in the GUI to perform the tape import on the target. This will prompt to select the SAN destination library to use for the import and then instruct which tapes to load into this library, show the import status to the tape handler to determine which physical tapes are ready for removal, whether new tapes need to be loaded, etc. Once tape initialization is complete (all tapes successfully imported into the target device), subsequent replication jobs will be transferred over the LAN/WAN to the target device. In the case where you may need to override tape initialization (for example, a tape could not be imported because it was lost) you can force the switch to LAN/WAN replication using the "Cancel Tape Transport" task. WAN Initialization In certain circumstances where the volume of data required to be transferred for the initialization process is small and the link speed allows it to happen in a reasonable time, the WAN link itself can be used to initialize the target device. See the following diagram. To implement this way of tape transfer you should leave "Initialize via Tape Transport" unselected when creating the echo copy pools. VLS Replication Implementation 107

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below. This option prompts you to select from the available “SAN Destination Library” devices to
use for the tape export:
The tape export will stack the virtual cartridges to replicate (the cartridges that contain the full
backup) onto the available physical tapes in the selected SAN destination library. The tape export
GUI will show the export status to the tape handler to determine which physical tapes are ready
for removal, whether new tapes need to be loaded, etc.
The format of these export/import tapes is unique via this process and associated with the physical
tapes is a catalog which is sent over the WAN to the remote site as soon as the tapes are produced.
On the subsequent import at the target site, the tape stack is read into the VLS and referenced
using the catalog that was sent via the WAN.
You must plug an HP Fibre Channel-attached tape library into the storage ports of the target device
and add it as a “SAN Destination Library.” Then you can run the “Import Tapes” task in the GUI
to perform the tape import on the target. This will prompt to select the SAN destination library to
use for the import and then instruct which tapes to load into this library, show the import status to
the tape handler to determine which physical tapes are ready for removal, whether new tapes
need to be loaded, etc.
Once tape initialization is complete (all tapes successfully imported into the target device),
subsequent replication jobs will be transferred over the LAN/WAN to the target device. In the
case where you may need to override tape initialization (for example, a tape could not be imported
because it was lost) you can force the switch to LAN/WAN replication using the “Cancel Tape
Transport” task.
WAN Initialization
In certain circumstances where the volume of data required to be transferred for the initialization
process is small and the link speed allows it to happen in a reasonable time, the WAN link itself
can be used to initialize the target device. See the following diagram. To implement this way of
tape transfer you should leave “Initialize via Tape Transport” unselected when creating the echo
copy pools.
VLS Replication Implementation
107