The best Side of magnetic roll
The best Side of magnetic roll
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この節では、主にコンピュータ用の磁気テープの記録媒体としての特性について説明する。
中川靖造「ドキュメント 日本の磁気記録開発 ――オーディオとビデオに賭けた男たち」全国書誌番号:
Flexible magnetic sheeting rolls and strip rolls are straightforward to use and simple to govern, making them a well known option for a lot of shopper, professional, industrial and retail purposes.
Pretty early or affordable tape recorders moved the tape merely by rotating the tape takeup reel. This simplified layout demands only one motor. This arrangement leads to variable tape speed. As tape accumulates within the motorized takeup reel, the spool of tape step by step enhanced in diameter, leading to it pulling the tape across the recording head significantly quicker.
Early IBM tape drives, such as the IBM 727 and IBM 729, ended up mechanically refined flooring-standing drives that utilised vacuum columns to buffer extensive u-shaped loops of tape. In between servo control of effective reel motors, a lower-mass capstan generate, plus the lower-friction and controlled rigidity of the vacuum columns, speedy start out and quit in the tape in the tape-to-head interface could possibly be reached.[a] The quick acceleration is feasible as the tape mass in the vacuum columns is compact; the size of tape buffered during the columns provides time for you to speed up the superior-inertia reels.
As soon as a tape equipment was put in and calibrated, there was no require for just about any attendant engineering, apart from to spool or switch the tape being used on it. Day-to-day maintenance consisted of cleansing and occasionally demagnetizing the heads and guides.
Helical scan recording writes short dense tracks in a diagonal way. This technique is used by nearly all present-day videotape programs and a number of other data tape formats.[citation wanted]
Despite the fact that a recording on tape may perhaps are already created at studio high quality, tape velocity is definitely the limiting issue, very similar to little bit amount limitations electronic recording. Reducing the speed of analog audio tape will cause a uniform lessen in the linearity of your frequency response, increased track record sound (hiss), a lot more obvious dropouts wherever there are actually flaws while in the magnetic tape, and shifting of the (Gaussian) background sounds spectrum towards lessen frequencies.
Documents and objects can be copied straight to a tape repository jogging LTFS technology, so they keep their native construction and metadata.
By registerring like a member on This great site you should be able to see A large number of scans/images, you may leave remarks or level releases detailed In this particular databases and interact / exchange your know-how, you might have also access to the tunes itself wherever it can be offered and/or specified authorization with the artist/band.
Early reel-to-reel customers realized to manipulate segments of tape by splicing them with each other and altering playback pace or route of recordings.
File systems call for info and metadata being stored on the data storage medium. Storing metadata in one position and facts in An additional, as is finished with disk-based mostly file programs, demands repositioning activity. Subsequently, most tape units utilize a simplified filesystem during which files are addressed by selection, not by filename. Metadata such as file title or modification time is usually not stored in the slightest degree. Tape labels retailer these types of metadata, and they're employed for interchanging information involving magnetic tape programs.
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Both variations characteristic a removable liner above a rubber-based mostly adhesive. Signal Exhibit with magnetic tape is great since the glimpse may be very cleanse (without having noticeable sign holder) and indications could be very easily repositioned.