Backup to tape drive

Backup of data to tape is one of the most well-known backup methods and has been well-proven for many years.

With their large to very large capacities and long durabilities, data tapes are the first choice for backups. A streamer is a magnetic tape drive for archiving and restoration of data. On a streamer, the data is written sequentially to the medium, i.e. from the beginning to the end. This also means that search process can take some time.

With the appropriate software, backup archives can be automatically copied to a tape drive, i.e. the backup archive is always created on a local hard drive first and then copied to tape in one go.

Popular drive types: TRAVAN, QIC, DLT, MLR, SLR, LTO, AIT, DDS, and DAT tape drives

Tape drives are established as an ideal backup tool because of their numerous security concepts, for private as well as professional use!

Tape backup to Travan

Travan Streamer (Quantum, Seagate, Certance) is the ideal backup solution for smaller servers, workstations, PCs and notebooks. They are particularly suitable for businesses with a few PCs or home offices, where only small amounts of data have to be backed up. Travan Streamer are characterized by their simplicity. They consist almost exclusively of the drive motor, the read/write head and some electronics. That makes them very robust and extremely reliable. Problems that one knows from e.g. DAT drives are not an issue here. Quantum Travan streamers are now available in the 7th generation with 20 GByte net capacity.

Tape backup to SLR

SLR (Scalable Linear Recording) is a recording method for streamers and the product name of Tandberg streamers. The streamers of the Tandberg SLR series (Single Linear Recording) are suitable for 4 to 200 GByte of data at a transfer rate of up to 600 MByte/min. The SLR technology was already developed in the end of the 70s, and the devices were initially known as QIC streamers. Because of their robust mechanical layout, SLR streamers offer a maximum of data security and reliability. Because 80% of the wear parts are contained in the data cartridge, including the tape guide, the wear and tear is extremely low. The modern drives of Tandberg Data are all equipped with Multi-Linear-Recording (MLR) technology, by which both the capacity of a cartridge and the speed is increased. Through magnetic head servo technology, unique in this class, a very high technical reliability of the drives is achieved. According to experience, Tandberg equipment runs very cleanly and stable. It is used in the professional sector.

Tape backup to DAT

DAT (Digital Audio Tape) drives are based on the 3.5'' format (4mm technology). Conventional DAT drives are available in sizes of 2 to 40 GByte. DAT Streamer record data using the helical track procedure (helical scan). The corresponding medium is very cheap, although comparatively not as durable as other drive types. The storage period is restricted, the requirements for the storage of such a medium are very high.

The capacity figures for DAT are usually determined with unrealistically high compression rates. In practice, only the uncompressed value is of any relevance. Because of the relatively large "cut" due to bad tape sectors ("Drops"), the real achieved capacity is usually smaller. In addition to that, DAT drives using the DDS-3-standard recognize and report pollution to the head too late. However, these devices are very popular and used frequently.

Tape backup to LTO

LTO (Linear Tape Open) drives were introduced by HP, IBM and Seagate in 1998. The medium size is 105 x 102 x 21 mm and one tape can hold between 100 and 800 GByte, depending on the LTO standard. The data is stored on the magnetic tape in several parallel tracks. 4 generations have been developed so far, where each new generation has typically offered a two-fold increase of data rate and capacity over its predecessor. Generation 3 has introduced WORM tapes and drives for one-time writing. In generation 4, an optional AES-256 encryption was introduced.

Tape backup to DLT

The DLT (Digital Linear Tape) technique was developed in 1994 by DEC. It also uses longitudinal tracks, but only one reel. The tape is wound onto a fixed reel in the drive with a special mounting mechanism. The drives offer a transfer rate of 10 MByte/sec and data capacities between 40 and 80 GByte with automatical error checking (parity checking, CRC and EDC (Error Detection Code) of the data blocks).