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An Alternate Solution To Hard Drives Recording.
Posted by vineetagarwal on March 11, 2007
Since the launch of the hard disk drives it has been very popular in the computer industry from saving people to loose their valuable data.But has anyone ever taught about the technology used beneath the working of the so called hard drive. Like with every good thing there is a bad thing associated with it, the same way along with the advantages of the hard drives there exists some of the limitations with the working of the hard disk.
Limitations of the current generation hard drives:
The storage capacity of any hard drive is dependent upon the “areal density”.By areal density I mean that how many bits of data an be recorded in a given area of disk real estate.The rate at which the areal density is growing is becoming limited due to a fundamental limit in magnetic recording technology known as the “super paramagnetic effect”.The fact that related this limit is that the magnetic material on the disk surface is made up of various minute particles. Because of the randomness of size and shapes, each bit written on the disk must cover 100 such small magnets in order to store the data reliably.
If the sizes of these magnets are lowered then it is quite possible that they lose their “magnetic orientation” (the side that is magnetic south may become magnetic north or vice versa.). This may happen due to excitation because of the heat developed inside the drive or may be also because of the room temperature. This heating restricts the head from reading the bit correctly i.e. 0 or 1 which leads to a data loss.Now you must be wondering about the limitation, but technology has a break for everything and a alternate to this the “perpendicular recording” technique.
Advantages of perpendicular recording:
This offers 10 times the storage density of longitudinal recording; on the same recording media i.e. you get more storage space and faster drives. This means the newer hard drives with perpendicular recording will be able to deliver to the range of terabit and above in terms of sheer storage capacities.
