ArVid

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ArVid 1020 ArVid 1052

ArVid (Archiver on Video) (Russian: АрВид, Архиватор на Видео) was a data backup solution using a VHS tape as a storage medium. It was very popular in Russia and the rest of the former USSR in the mid-1990s.

It was produced in Zelenograd, Russia by PO KSI.[1]

## Contents

* 1 Features
* 2 Disadvantages
* 3 Operation
* 4 Models
* 5 References
* 6 External links

## Features

* Using low-cost VHS tapes and recording units for data backup.
* High reliability
* Hamming code error correction
* Easy data copying between two VHS units (eliminating need of a computer for data copying)

## Disadvantages

* Inefficient tape capacity usage (only 2 grades of luminance signal spectrum were used)
* Poor software support

## Operation

A VHS recorder unit should be connected to an ArVid ISA board by a composite video cable. Unit operation is controlled by a remote control emulator using an LED.

Device may operate in two modes: low data rate at 200 KB/s and high data rate at 325 KB/s (equivalent to roughly 1.33× and 2.17× CDR recording speed). The original, lower recording speed was retained as a user option because not all VHS recorders of the time offered sufficient recording quality to reliably support the higher speed.

An E-180 video tape is able to hold 2 GB of uncompressed data at the lower rate, more than sufficient for most PC hard drives of the time. This can be shown by calculating 200 KB/s × 60 s/min × 60 min/h × 3 h = 2.06 GB (2.06 × 230 bytes), which also leaves a few minutes spare for header and synchronisation space.

Note that it is unclear here whether "200 kbyte" means 200000 (200 × 103) or 204800 (200 × 210); the above calculation assumes the latter, but the former still produces a capacity of 2.01 GB (2.01 × 230 bytes), providing 2.00 GB of capacity in a little under 2 hours and 59 minutes. Similarly, this means that an E240 4-hour tape, using the higher data rate, would be capable of storing between 4.35 and 4.46 GB (230 bytes), approximately equivalent to a standard single-layer recordable DVD.

## Models

* ArVid 1010, 100 kbyte/s, 4 kbyte RAM,[2] was first of ArVid devices. Its production started in 1992.
* ArVid 1020, 200 kbyte/s, no RAM, was a successor to ArVid 1010 using more advanced integrated circuitry.
* ArVid 1030/1031, 200 kbyte/s, 64 kbyte RAM, had better internal design, less power consumption, was smaller in size and was made using CPLD. It allowed automatic switching to a TV set when device was not in use.
* ArVid 1051/1052, 325 kbyte/s, 128/512 kbyte RAM

## References

1. ↑ http://pc2008.ru/ustroistva-arhivacii-dannih-i-strimeri/arvid.php Arvid (Арвид), стример на базе видеомагнитофона VHS Script error: The function "in_lang" does not exist.
2. ↑ http://andy.sumy.ua/old_computers/world_museum/detali_ussr.htm Script error: The function "in_lang" does not exist.

## External links

* "ArVid documentation" (in Russian). Archived from the original on 2005-02-07. https://web.archive.org/web/20050207182321/http://oldhard.hotmail.ru/pc/arvid/arvid.htm.
* ArVid description and images (in Russian)
* Drivers for linux and FreeBSD [|permanent dead link|dead link}}]
* "Drivers for Linux" (in Russian). Archived from the original on 2011-05-18. https://web.archive.org/web/20110518153645/http://www.pentahd.redline.ru/arvlinux/.
* "Arvid FAQ". Archived from the original on 2013-03-19. https://web.archive.org/web/20130319085844/http://faqs.org.ru/hardw/storage/arvidfaq.htm.

* v
* t
* e

Magnetic tape data storage formats

Linear|

| Wide (19–25.4 mm)|

* IBM 7340 (1961)
* LINCtape (1962)
* DECtape (1963)
* CDC 626 (1966)

|

Half inch (12.7 mm)|

* UNISERVO (1951)
* IBM 7 track (1952)
* TX-2 Tape System (1958)
* 9 track (1964)
* IBM 3480 (1984)
* DLT (1984)
* IBM 3590 (1995)
* T9840 (1998)
* T9940 (2000)
* LTO Ultrium (2000)
* IBM 3592 (2003)
* T10000 (2006)

Eight millimeter (8 mm)|

* Travan (1995)
* IBM 3570 MP (1997)
* ADR (1999)

Quarter inch (6.35 mm)|

* QIC (1972)
* SLR (1986)
* Ditto (1992)

"Eighth" (0.15) inch (3.81 mm)|

* KC standard, Compact Cassette (1975)
* HP DC100 (1976)
* Tarbell Cassette Interface (1976)
* Commodore Datasette (1977)
* DECtape II (1979)
* IBM PC Cassette (1981)

Stringy (1.58–1.9 mm)|

* Exatron Stringy Floppy (1979)
* ZX Microdrive (1983)
* QL Microdrive (1984)
* Rotronics Wafadrive (1984)

Helical|

| Three quarter inch (19 mm)|

* Sony DIR (19xx)
* Ampex DST (1992)

|

Half inch (12.7 mm)|

* Redwood SD-3 (1995)
* DTF (19xx)
* SAIT (2003)

Eight millimeter (8 mm)|

* Data8 (1987)
* Mammoth (1994)
* AIT (1996)
* VXA (1999)

Four millimeter (3.81 mm)|

* DDS/DAT (1989)

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