The magnetized tape is fed into the read-head. The magnetic field of the tape pigments permeates the region and the ferromagnetic ring with a slit helps permeate the field without attenuation. As the tape keeps moving, the tape guide on left side feeds the un-magnetized tape into the write-head and the magnetized part is received by the tape-guide on the right side. Reusable− It can remove a specific data and save another data at the same place. Therefore it can be reused.

The magnetized tape is fed into the erase-head, which applies a changing high-frequency and a high-amplitude current, inducing a proportional magnetic field in the head. This field is permeated the ferromagnetic ring into the tape, erasing the previous magnetization of the pigments. The top coat consists of a magnetic pigment held together by a binder to form an emulsion. The magnetic pigment consists of a ferromagnetic substance like ferrous oxide, chromium dioxide or pure iron. The pigment provides small magnetic domains that can be manipulated to create and store signals. The binder is a thermoplastic polymer like cellulose acetate or polyurethane, which has the magnetic pigment pigments embedded in it. The top coat is quite thin and ranges from 2um-13um in cross-sectional length.The lid of a rectangular box of sides \( 40 \mathrm{~cm} \) by \( 10 \mathrm{~cm} \) is sealed all round with tape. What is the length of the tape required? Access Time− Accessing a record requires accessing all the records before the required record. So access time is very large in magnetic tape.

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. a b "Sony develops magnetic-tape technology with the world's highest*1 areal recording density of 148 Gb/in2". Sony Global. Archived from the original on 5 May 2014 . Retrieved 4 May 2014. The basic principle behind the working mechanism remains the same for all magnetic tapes, irrespective of the year of manufacture. As materials science has advanced, tapes with suitable physical and chemical properties such as thin width, high flexibility, high data density, and resistance to humidity, were developed in the latter half of the twentieth century. Magnetic drums, magnetic tape and magnetic disks are types of magnetic memory. These memories use property for magnetic memory. Here, we have explained about magnetic tape in brief.Many motion picture production companies record their footage on tape after experiencing costly failures with both hard disk and flash. In 2014, Sony and IBM announced that they had been able to record 148 gigabits per square inch with magnetic-tape media developed using a new vacuum thin-film forming technology able to form extremely fine crystal particles, allowing true tape capacity of 185 TB. [3] [9] See also [ edit ] Find sources: "Magnetic tape"– news · newspapers · books · scholar · JSTOR ( May 2011) ( Learn how and when to remove this template message)