Talk:Magnetic tape
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Shouldn't there be a mention about the predecessor, iron wire? Kwantus (Nevermind, it's under reel-to-reel.)
There should also be mention of capacities that have been recently achieved - LTO-3, 800GB compressed. -Tapeman
"Tape remains a viable alternative to disk due to its higher bit density and lower cost per bit" -- These tend to be true only for narrow usages these days. The article currently seems to have a wide scope but a narrow focus, which results in it being slightly misleading.
In the table of tape formats, there is an error: Dectape II is NOT a 3/4" format! It used a preformatted DC150 cartridge, a baby brother to the QIC (aka DC300). I don't know exactly what size the tape was but it was on the order of 4mm or 1/8". I don't know how to edit this common table. Jeh 02:28, 18 August 2006 (UTC)
[edit] 6250 bpi, 3200 bpi
Anyone have information on the recording techniques used for 6250 bpi and 3200 bpi 9-track tapes? The 3200 format is described as "Double Phase Encoding"; I think it may be the same as 1600 only denser (as some tape drives can do 3200 bpi) but I'm not sure. The 6250 format is called GCR, but in this case that's an error-correction code. I'd like to know what the actual recording technique was (NRZi, maybe?). One reference states that a 6250 bpi tape had over 9000 flux transitions per inch, but the numbers don't add up for either PE or NRZi (6250 * 8/7 = 7142 takes the error correction code into account if it's NRZi). There's an ANSI standard (X3.54) but I'm too cheap to buy it for curiosity's sake. Nybbler 20:21, 2 March 2006 (UTC)
Nevermind... found it. It's RLL(0,2), which is a rate 5/4 code. And 4 synchronization codes are inserted every 316 data codes, which gives 6250 * 8/7 * 5/4 * 320/316 = (approx) 9042. Nybbler 15:33, 6 March 2006 (UTC)
[edit] Image:Magnetic tape.jpg has been listed for deletion
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[edit] Removing Link
I am looking for information about the process of magnetic recording. What I get when I click on this link (at "Guitarz-for-ever"), besides advertisement links, direct product links, and links for "Eddie Van Halen" and "Motivation to Acheive Success", is seven basic paragraphs on the evolution of recording. If there is any appropriate information, i.e. information concerning the subject of this encyclopedia article, it is not directly accessible. Renfield 16:08, 19 June 2006 (UTC)
