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DLT

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- DLT (digital linear tape) is a form of magnetic tape and drive system used for computer data storage and archiving. A special compression algorithm, known as Digital Lempel Ziv 1 (DLZ1), facilitates storage and retrieval of data at high speeds and in large quantities.

In the DLT drive, data is written on the tape in dozens of straight-line (linear) tracks, usually 128 or 208. Some cartridges can hold 70 gigabytes (GB) of data when compression is used. A variant of DLT technology, called SuperDLT, makes it possible to store upwards of 100 GB on a single cartridge. The SuperDLT drive can transfer data at speeds of up to 10 megabytes per second (Mbps).

DLT is one of several technologies developed in recent years to increase the data-transfer rates and storage capacities of computer tape drives. Some examples of competing devices include the linear tape open (LTO) drive, the advanced intelligent tape (AIT) drive, and the Mammoth drive.

Learn more about Tape backup and libraries

Here comes LTO-5 tape technology, ready or not: Even with a slow economy and adoption of LTO-4 by no means complete, the LTO Consortium is gearing up to offer LTO-5, which is slated for release in early 2010.
How to estimate the lifespan of LTO tapes: This tip outlines what you need to consider when estimating the lifespan of LTO tape. It's not as black and white as LTO tape manufacturers would like you to believe.
Criteria for choosing the right tape encryption solution for your data backup plan: How do you decide which tape encryption product is right for your enterprise? Learn about what factors you need to look at before deciding on an encryption product.
LTO-4 tape technology finally catching on -- tape storage isn't dead yet: Built-in encryption and the need to archive for compliance spark interest in LTO-4 tape as a companion to disk backup, and LTO-5 will offer more improvements.
Data storage backup security tutorial: Tape encryption and cloud backup: Data storage backups are an necessary element of data protection plan, but they're often the biggest source of security woes.
Avoid data loss with proper tape storage handling procedures: Curtis Breville answers some of the most common questions about tape handling.
Storage Decisions Session Downloads: Backup Technologies Track (Chicago 2009): This Storage Decisions Chicago 2009 track explores topics including data deduplication, virtual tape libraries and managing your backup budget.
Data backup and recovery technology tutorials: Learn about the latest data backup and recovery technology trends in our technology tutorials.
Data backup and recovery tutorial: Tape storage: Learn about recent advancements in tape backup and recovery, how tape encryption impacts backup and how to buy a tape library in this tape technology tutorial.

CONTRIBUTORS:	Eleanor Parmalee
LAST UPDATED:	05 Aug 2001

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More resources from around the web:

-	Digital Storage Works sells a DLT drive.
-	ZDNet UK compares SuperDLT and LTO.
-	ZDNet also compares AIT, DLT, and Mammoth drives.

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