Interface Information Tab - HP StoreOnce User Manual

Table 6 Emulation types for tape devices (continued)
Emulation type
MSL G3 series (8x96)
Library:
ESL-E series Library:
EML-E series 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:
An important consideration when configuring VTL devices is that the library and each drive
that you configure for it counts as a separate device. There are practical limitations on the
number of devices that each host or HBA can access.
For iSCSI VTL devices a single Windows or Linux host can only access a maximum of 64
devices. A single library with 63 drives is the most that a single host can access. Configuring
a single library with more than 63 drives will result in not all devices in the library being seen
(which may include the library device). The same limitation could be hit with multiple libraries
and fewer drives per library.
The total device value also applies to NAS shares and Catalyst stores. If you configure the
full value as VTL devices, you will not be able to configure any NAS shares or Catalyst stores
for that appliance.
Please refer to the HP Best Practices for VTL, NAS, StoreOnce Catalyst and Replication
implementations for maximum and recommended values.

Interface Information tab

This tab shows interface information for the media changer and drives on the selected library.
The information for the Interface Information tab is generated automatically and changing it is not
recommended.
The following information is provided for a device that is configured to use the iSCSI interface.
20 VTL (Virtual Tape Libraries) functions
Description
This is a tape library device with a maximum of four embedded Ultrium tape drives and 96
cartridge slots.
This is an enterprise tape solution which allows you to configure up to 200 drives per node
and up to 4096 cartridges per library.
This is an enterprise tape library solution which allows you to configure up to 200 drives
per node and up to 4096 cartridges per library.