LAN-free backup

A LAN-free backup  is a backup of server data to a shared, central storage device without sending the data over the local area network (LAN). It is usually achieved by using a storage area network (SAN).[1]

Note that trivial backup to a dedicated, unshared storage device (such as local tape drive) does not meet the definition.[citation needed]

## Contents

* 1 Technical aspects
* 2 See also
* 3 References
* 4 External links

## Technical aspects

The goal of LAN-free backup is to reduce the load on LAN and reduce the time it takes to complete the backup.[1] It offers an alternative way of backup than a simple data copy to network-attached storage (NAS) over LAN.[citation needed]

It comes in different flavours:

* with backup server:[1] in addition to a shared storage device (usually a traditional tape library), there exists a central server arbitrating access to device (for all the other SAN servers). The central server however, does not handle data stream itself.[citation needed]
* without backup server:[1] the storage facility (usually a virtual tape library, or VTL) is smart enough to handle multiple data accesses without intermediate component.[citation needed]

## See also

* Data backup
* Storage area network
* Network-attached storage
* Fiber Channel technology

## References

1. ↑ 1.0 1.1 1.2 1.3 Preston, W. Curtis (2007-01-03) (in en). Backup & Recovery: Inexpensive Backup Solutions for Open Systems. O'Reilly Media. pp. 210–212. ISBN 978-0-596-55504-7. https://books.google.com/books?id=6-w4fXbBInoC.

## External links

* Description of Lan-Free Client Data Transfer Operation
* IBM Tivoli Storage Manager: LAN/WAN Backup; ServerFree Backup; LANFree Backup; and Split-Mirror Backup - What Does It All Mean?

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