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ArVid
ArVid
(Archiver on Video) (Russian: АрВид, Архиватор на Видео) is a data backup solution using a VHS
VHS
tape as a storage medium. It was very popular in Russia
Russia
and former USSR in mid-1990s. It was produced in Zelenograd, Russia
Russia
by PO KSI.[1]

Contents

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

Features[edit]

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

Disadvantages[edit]

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

Operation[edit] A VHS
VHS
recorder unit should be connected to an ArVid
ArVid
ISA board via 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 kbyte/s and high data rate at 325 kbyte/s (equivalent to roughly 1.33x and 2.17x CDR recording speed). The original, lower recording speed was retained as a user option because not all VHS
VHS
recorders of the time offered sufficient recording quality to reliably support this 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 x 60 x 60 x 3 = 2.06 GB (2.06 x 2^30 bytes), which also leaves a few minutes spare for header and synchronisation space. Note that it is unclear here whether "200 kbyte" means 200,000 (200 x 10^3) or 204,800 (200 x 2^10); the above calculation assumes the latter, but the former still produces a capacity of 2.01 GB (2.01 x 2^30 bytes), providing 2.00 GB of capacity in a little under 2 hours and 59 minutes. Similarly, this means an E240 4-hour tape, using the higher data rate, would be capable of storing between 4.35 and 4.46 GB (2^30 bytes), approximately equivalent to a standard single-layer DVDR. Models[edit]

ArVid
ArVid
1010 was first of ArVid
ArVid
devices. Its production started in 1992. ArVid
ArVid
1020 was a successor to ArVid
ArVid
1010 using more advanced integrated circuitry. ArVid
ArVid
1030/1031 had better internal design, less power consumption, was less in size and was made using CPLD. It allowed automatic switching to a TV set when device was not in use. ArVid
ArVid
1051/1052 introduced 325 kbyte/s data rate and 128/512 kbyte buffer cache (respectively).

References[edit]

^ http://pc2008.ru/ustroistva-arhivacii-dannih-i-strimeri/arvid.php Arvid (Арвид), стример на базе видеомагнитофона VHS
VHS
(in Russian)

External links[edit]

Wikimedia Commons has media related to ArVid.

" ArVid
ArVid
documentation" (in Russian). Archived from the original on 2005-02-07.  ArVid
ArVid
description and images (in Russian) Drivers for linux and FreeBSD[dead link] "Arvid FAQ". Archived from the original on

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