Making Replication Target Libraries Visible To The Host - HP StoreOnce B6000 Series User Manual

MSL G3 series (8x96) Library: This is a tape library device with a maximum of four embedded
Ultrium tape drives and 96 cartridge slots.
ESL-E series Library: This is an enterprise tape solution which allows you to configure up to
192 drives per node and up to 16384 cartridges per library.
EML-E series Library: This is an enterprise tape library solution which allows you to configure
up to 192 drives per node and up to 16384 cartridges per library.
Flexible emulation
The ESL, EML and D2DBS emulations are particularly flexible because they allow you to configure
a large number of drives per library. This has two main benefits:
It allows for more concurrent streams on backups which are throttled due to host application
throughput, such as multi-streamed backups from a database.
It allows for a single library (and therefore dedupe store) to contain similar data from backups
that must run in parallel to increase deduplication ratio.
If using these flexible emulation types, the following factors should also be considered:
Although there are no hard limits on the number of drives that can be configured per library,
there are limits on the total number of libraries and drives that can be configured on an
appliance node. If you configure 1 library with 192 drives on an HP B6200 Backup System,
you will still have 47 libraries available in theory, but you will have no more drives.
The total value also applies to NAS shares. If you configure the full 240 value as VTL devices,
you will not be able to configure any NAS shares for that appliance node.
Please refer to the HP StoreOnce Best Practices for VTL, NAS and Replication implementations
for maximum and recommended values.

Making Replication Target libraries visible to the host

NOTE: See Chapter 5 for more details on replication configuration.
Replication Target libraries are not normally visible to the host, but you can configure devices to
make them visible to backup applications. This allows the backup application to:
Move cartridges from storage slots to drives in the library
Perform read and verify operations on the cartridge (but not write)
Perform load/unload operations on the tape device
WARNING!
and target libraries, it will not be able to distinguish between the source library and the target
library because the barcodes are duplicated in the two locations.
Why make target libraries visible?
There are two occasions when it may be useful to make a target library visible to the backup
application on the host.
To confirm that replication is working correctly and check the integrity of the replicated backup
by doing a test restore
To perform manual tape copy jobs to any tape device on the network using the backup
application
IMPORTANT:
temporarily into a physical tape device to read it.
28 VTL (Virtual Tape Libraries)
This facility should be used with care. If the backup application can see both source
You cannot change data on a Target library cartridge; you may only load it