HP StoreOnce Backup - Manual (Page 167)

Glossary
A
Autoloaders An autoloader is a Virtual Tape Device that has a single tape drive and multiple storage slots.
(A library has multiple tape drives.) Each storage slot contains a cartridge that can be allocated
to a specific backup task; for example, one cartridge can hold Monday's data, another can hold
Tuesday's data, and so on. In this way, backup applications are able to implement tape rotation
strategies that accommodate differing backup requirements for daily, weekly, monthly, yearly
backups.
B
Backup devices
and slots See Virtual Tape Devices.
C
CIFS Common Internet File System (CIFS) is a protocol for interfacing to hosts on a Windows network.
The HP StoreOnce Backup System supports this interface for connecting to NAS targets from a
Windows network.
D
Deduplication Data deduplication compares blocks of data being written to the backup device with data blocks
previously stored on the device. If duplicate data is found, a pointer is established to the original
data, rather than storing the duplicate data sets. This removes, or “deduplicates,” the redundant
blocks. See also the HP StoreOnce Backup System Concepts Guide.
The main benefit of deduplication is that it is possible to store more data and retain data for
longer on each device. The host using the device has access to a greater depth of historical data
that would otherwise have been archived offline.
Figure 55 Data stored after deduplication
E
Emulation types HP StoreOnce products emulate a range of physical Tape Autoloaders or Tape Libraries. Supported
emulation types are listed below:
•
HP 1x8 G2 Autoloader (HP D2D2500)
•
HP MSL2024 Library
•
HP MSL4048 Library
•
HP D2DBS Library
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