Advanced digital recording

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Advanced Digital Recording (ADR) is a magnetic tape -Speicher for backup ( Backup ) and archiving of data. It uses cassettes with 8 mm wide magnetic tape with a capacity of up to 60 GB.

ADR uses a linear recording method (similar to e.g. DLT , in contrast to helical track recording in e.g. DDS ). A servo system enables the tape to be positioned with a high degree of accuracy and thus a high track density (192 tracks) can be achieved. The tape is written in parallel in 8 channels; The error correction code is also distributed in the transverse direction ( Spatially Distributed Error Correction Code ), so that the information can still be restored even if a channel (24 tracks) is completely illegible (ie over the entire length of the tape).

ADR was developed by Philips and is based on technologies that were originally developed for the Digital Compact Cassette (DCC). The company OnStream was founded in 1999 for marketing purposes, but was dissolved in April 2003. The American Onstream Inc. had already filed for bankruptcy in March 2001, after which the business was continued by the Dutch subsidiary Onstream BV.