1. When data is recorded onto magnetic tape, it is written in blocks with inter-block gaps between them. The rate at which data is written or read determines how the tape drives will have to cope with the rate at which data goes on and off the tape as well as the rate at which data is supplied to or demanded from the host.
Digital recording on magnetic tape was the first step in leaving records behind. Devices to retrieve the data were much less cumbersome than phonographs. Reading devices soon became portable as the tape recorder.
Magnetic tape is a medium for magnetic recording, made of a thin magnetizable coating on a long, narrow strip of plastic. It was developed in Germany, based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders. A device that stores computer data on magnetic tape is a tape drive.
Of these only CD-ROMs use LASERs to access the data. The others are magnetic storage devices.
the purpose of tape streamer is that to store data on a magnetic tape by the hard disk p.s it is the only purpose of streamer,,,
Magnetic tape backup of your data is done with a magnetic tape data storage system. You can use digital recording to store your digital data on the magnetic tape as a backup.
A hard drive comes with the Computer. A hard drive is considered permanent as opposed to magnetic tape. The data in tape can be accessed only serially whereas randomly in hard drive.
Magnetic tape devices used for storage in the business world are now being replaced with computer data bases. The computer data base can be saved to a compact disk.
Common hard disks with read/write heads are magnetic storage. The newer SSD (solid state drive) hard disks are not magnetic because there are no read/write heads. Solid state means no moving parts. SSD drives are labeled as such so you know what you are buying.
Tape drive and hard disk drive
magnetic
magnetic tapes are cheaper
These items are probably before your time. Back in the day before even cassette tapes were invented, tape-recordings were "reel to reel" like cinema film. These reel-to-reel tapes were used to record music and computer data in a mechanically linear fashion. A floppy disk is/was made of the same material but in a disk form like an LP record. Floppys came in use and tapes went obsolete since reels were bulky, tape often broke, crinkled, or became un-spooled from the reel
hard disk