HP D2D HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 37

Glossary

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Glossary A Autoloaders B Backup devices and slots C CIFS D Deduplication 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. See Virtual Tape Devices. 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. 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. 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 The host using the device has access to a greater depth of historical data that would otherwise have been archived offline. 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 MSL2024 Library • HP MSL4048 Library • HP D2DBS Library • HP MSL8096 Library (HP D2D4300/D2D4100) • HP ESL-E Library (HP D2D4300/D2D4100) • HP EML-E Library (HP D2D4300/D2D4100) • HP D2DBS Generic Library If it is supported by your backup application, HP D2DBS Generic Library is the preferred emulation type because it does not emulate any physical library types in existence and is clearly identifiable as a StoreOnce device. It is the most flexible emulation type available; however, backup application support varies by software vendor. F Fibre Channel (FC) Fibre Channel (FC) supports network connectivity over fibre optic cabling or copper wiring. FC has a different set of standards and network connection protocol to Ethernet and different configuration requirements. FC HP StoreOnce Backup Systems may be connected to both a Fibre Channel SAN and an Ethernet (as an iSCSI device) network. The FC connection is used only to 37

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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.
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.
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 MSL2024 Library
•
HP MSL4048 Library
•
HP D2DBS Library
•
HP MSL8096 Library (HP D2D4300/D2D4100)
•
HP ESL-E Library (HP D2D4300/D2D4100)
•
HP EML-E Library (HP D2D4300/D2D4100)
•
HP D2DBS Generic Library
If it is supported by your backup application, HP D2DBS Generic Library is the preferred emulation
type because it does not emulate any physical library types in existence and is clearly identifiable
as a StoreOnce device. It is the most flexible emulation type available; however, backup
application support varies by software vendor.
F
Fibre Channel (FC)
Fibre Channel (FC) supports network connectivity over fibre optic cabling or copper wiring. FC
has a different set of standards and network connection protocol to Ethernet and different
configuration requirements. FC HP StoreOnce Backup Systems may be connected to both a Fibre
Channel SAN and an Ethernet (as an iSCSI device) network. The FC connection is used only to
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