Magnetic Tape Essay

Magnetic magnetic watchline is a average for magnetised record, do of a thin magnetizable coating on a long, narrow miscue of plastic film. It was developed in Germ any(prenominal), based on magnetic cable recording. Devices that record and play back audio and video utilise magnetic tape are tape recorders and video tape recorders. A wrench that stores computing machine info on magnetic tape is a tape drivOver years, magnetic tape can suffer from deterioration called sticky-shed syndrome. Ca drilld by engrossment of moisture into the binder of the tape, it can render the tape unusable. MeritsCapacity* 1 of the key advantages of magnetic tape is its capacity for holding entropy. Magnetic tape was the first medium able to hold a feature-length movie on a small, inexpensive doodad, thus enabling the home video grocery store of the 1980s. In addition, compact cassettes can hold music on both(prenominal) sides, giving them a 90-minute total playing condemnation, whic h is even greater than virtually CDs. switch* Magnetic tape is also easy to edit use a traditional linear-editing system. This can involve duplicating a portion of a tape to a master reel, or physically cutting the tape and attaching the desired portions together with glue, splicing cement or adhesive tape. Editing in this manner requires no special computer equipment and may be less expensive and/or easier to learn than nonlinear digital editing.DEMERITS genesis Loss* One of the disadvantages of magnetic tape is generation loss, which refers to the fact that to each one successive copy of a tape loses quality compared to the real. This can posit it difficult to use magnetic tape for editing-intensive projects, or when extremely laid-back fidelity is important. Digital media, on the other hand, can be copied and reproduced indefinitely with no visible or audible difference between the original and any of its copies.Durability* Another problem with magnetic tape is its intent ion to stretch away over time, causing the quality of the data to deteriorate. On old video tapes, this generally appears in the form of poor audio, and realize data can eventually suffer as intumesce. Over time magnetic tape acquires a layer of magnetic debris from recording and playback heads, which may need to be cleaned periodically to continue functioning.Mechanical mazyness* The mechanical complexity needed to use magnetic tape is nigh other disadvantage of the medium. Items like cassette and VHS tapes include two separate reels, as well as a mechanism for exposing a small portion of the tape inside a player or recording invention. Reel-to-reel tape players use multiple motors and moving parts, each of which is susceptible to mechanical failure. In the soil of digital media, flare pass-based memory uses no moving parts, thus eliminating this problem.Advantages and Disadvantages of a USB bourgeon DriveFebruary 27, 2012Advantages and disadvantagesAdvantagesCompared t o hard drives, flash drives use little power, draw no fragile moving parts, and for most capacities are small and light. Data stored on flash drives is impervious to mechanical shock, magnetic fields, scratches and dust. These properties make them suitable for transporting data from place to place and keeping the data readily at hand. moth-eaten drives also store data densely compared to many removable media. In mid-2009, 256 GB drives became available, with the ability to hold many times more data than a DVD or even a Blu-ray disc,2 well-nigh individual(prenominal) computers support USB as of 2010. Flash drives implement the USB mass storage device class so that most modern direct systems can read and write to them without installing device drivers. The flash drives present a childlike block-structured logical unit to the host in operation(p) system, hiding the individual complex implementation details of the various underlying flash memory devices.The operating system can u se any file system or block addressing scheme. Some computers can boot up from flash drives. curiously manufactured flash drives are available that have a poser rubber or metal casing designed to be seal off and virtually unbreakable. These flash drives retain their memory after be submerged in water, and even through a machine wash. divergence such a flash drive out to dry all originally allowing current to run through it has been known to take in a working drive with no future problems. Channel louvres Gadget Show cooked one of these flash drives with propane, froze it with dry ice, submerged it in various acidic liquids, ran over it with a jeep and fired it against a wall with a mortar. A company specializing in retrieve lost data from computer drives managed to recover all the data on the drive.42 All data on the other removable storage devices tested, using optical or magnetic technologies, were destroyed.DisadvantagesMain article Flash memoryLimitationsLike all flas h memory devices, flash drives can observe only a limited number of write and erase cycles before the drive fails.43unreliable source?44 This should be a consideration when using a flash drive to run application software or an operating system. To address this, as well as space limitations, some developers have produced special versions of operating systems (such as Linux in Live USB)45 or tired applications (such as Mozilla Firefox) designed to run from flash drives. These are typically optimized for size and configured to place temporary or intermediate files in the computers main RAM rather than store them temporarily on the flash drive. Most USB flash drives no longer include a write-protect mechanism, although a small number have a switch on the housing of the drive itself to keep the host computer from writing or modifying data on the drive. Write-protection makes a device suitable for repairing virus-contaminated host computers without assay of infecting the USB flash dr ive itself. A write-locked SD card in a USB flash card reader adapter is an effective way to avoid any writes on the flash medium.The SD card as a WORM device has an essentially unlimited life. A drawback to the small size is that they are slowly misplaced, left behind, or otherwise lost. This is a particular problem if the data they contain are sensitive (see data security). As a consequence, some manufacturers have added encryption hardware to their drivesalthough software encryption systems which can be used in conjunction with any mass storage medium achieve the same thing. Most drives can be attached to keychains, necklaces and lanyards. The USB stack is usually fitted with a removable and easily lost protective cap, or is retractable. USB flash drives are more expensive per unit of storage than biggish hard drives, still are less expensive in capacities of a few tens of gigabytes as of 2011 Maximum available capacity is increasing with time, but is less than larger hard dr ives. This balance is changing, but the rate of change is slowing..Most USB based flash technology integrates a printed circuit add-in with a metal tip which is simply soldered on. As a result the stress point is where the two pieces join. Some manufacturers quality control does not ensure a proper solder temp further alter the stress point. Since many Flash Drives stick out from a users laptop computer or PC they are likely to be bumped repeatedly in their life time and may break at the stress point. Most of the time a break at the stress point results in permanent damage to the printed circuit board where the joint is torn from the circuit. However, some manufacturers produce discreet flash drives that do not stick out and others use a solid metal uni-body that has no easily palpable stress point.