The surface of a magnetic tape and the surface of a magnetic disk are covered with a magnetic material which helps in storing the information magnetically. Both are non-volatile storage. Despite these similarities both differs in many aspects from their appearance to their working, their cost and much more. The basic difference between magnetic tape and magnetic disk is that magnetic tape is used for backups whereas, magnetic disk are used as secondary storage.
Let us discuss some more differences between magnetic tape and magnetic disk with the help of comparison chart shown below. Used as a secondary storage. Physical Plastic thin, long, narrow strip coated with magnetic material. Several platters arranged above each other to form a cylinder, each platter has a read-write head.
Use Idle for sequential access. Idle for random access. Access Slower in data accessing. Fast in data accessing. Update Once data is fed, it can't be updated. Data can be updated. Data loss If the tape is damaged, the data is lost.
In a case of a head crash, the data is lost. From Several hundred GB to Terabytes. Expense Magnetic tapes are less expensive. Magnetic disk is more expensive. This chart shows the time required for one drive to read a single file.
For tape and optical disk storage systems, it is assumed that time is needed to load media into the drive and access the desired data. When the data size is small, an HDD system, which is online, can read the data in a very short time because its access speed is high.
However, when the data size is approximately 30 GB or more, the transfer speed of a tape system is advantageous, and it can read data faster than a HDD system. This shows that HDD systems have the edge for small data sizes, and that tape systems are superior for large data sizes. The optical disk system shows inferior performance in both areas.
Tape Storage Disk Storage vs. Tape Storage. Because of their reduced cost, HDDs are now commonly used in a wide range of fields.
It appears as if they have substituted for tape media in backup applications. The magnetic tape is a sequential storage device. The data can only be read as a serial input. Magnetic tapes are mostly used in Audio cassettes and video cassettes. Magnetic tapes are used as digital data storage devices as well as analog data storage devices. A magnetic disk operates the same way a magnetic tape does, but magnetic disks can usually store a large amount of data than the magnetic tapes.
The main advantage of the magnetic disk is that data can be read from anywhere. A magnetic disk is also more portable than the magnetic tape.
Computer hard disc drives are the main devices that use magnetic disks. Magnetic disks are not shockproof. A shock can change the current magnetic condition of a material.
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