The parameters that characterize the operation of a hard disk are:
Disk type : Indicates its technology and physical structure. The basic types are: fixed-head disks, disk packs, disk cartridges, Winchester disks, and floppy disks.
Capacity : Indicates the content in octets (bytes) that
the disk is capable of storing. Storage capacity depends on the size of the recording surface, number of recording surfaces and type of recording (single or double density).
Size : Indicates the diameter of the plate where the magnetizable surfaces are located.
Average access time: It is the average time that the read/write head takes to access a given sector.
Transfer speed : Indicates the number of bytes that are transferred per unit of time between the central computer and the device or vice versa.
Rotational speed : It is the number of revolutions per minute at which the plate containing the magnetizable surface rotates.
Number of surfaces : It is the number of taxable surfaces.
Number of heads : It is the number of read/write heads that the unit consists of.
Number of tracks : It is the number of recordable circumferences. The number of tracks per surface is usually indicated.
Number of sectors per track : It is the number of blocks or physical records that are in a track.
Number of words per sector : It is the number of words that can be recorded in a sector.
Bits per words : Indicates the number of bits used by the recorded words.
Maximum Density : Indicates the maximum recording density on the tracks, that is, the recording density on the innermost track. This parameter is indicated in bits/inch or bits/cm.
Recording code : It is the code used for the magnetic recording of the information. From a practical point of view, it is interesting to know if the recording is made in single or double density.