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Posts Tagged ‘capacity drives’

Support information

1 What is information medium?

2 Which means that the media have a way of sequential or random access to information?
3 How we rank them according to the technology used in your configuration?
4) Make a list of at least 8 media find an image of each show its capacity for data storage and gives some general characteristics.
5) Find some images that show how to perform reading and writing data on magnetic media, in an electronic and an optical.

1 – With the constant evolution of computers in recent years, it is necessary that the information already developed by the computer to be memorized or stored in large capacity drives. These units are known as mass storage and are internal or external devices to the computer for storing large volumes of information, both programs and data.
These devices have a fundamental characteristic: the recorded information characters are not volatile, that remains even if power is disconnected.
The stored information will be treated later by another computer with similar characteristics to that was the source of information.

2-Sequential access: sequential access, the reading element of the device must pass through the space occupied by the totality of the data previously occupied space physically stored data comprising the set of information to be accessed.
Random access: the random access mode, the scan element can directly go to the address where the information is stored physically to be located without having to pass through to the stored between the start of the recording surface and the point where stores the information sought.

3-in computer keyboard is an input peripherals or devices, in part inspired by the keyboard of typewriters, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches that send information to the computer. After the punch cards and paper tapes, the interaction through the ticker-style keyboards became the primary means for computer input.

4 – The characteristics that must be taken into account on a hard drive are:
* Access Time: Average time it takes the needle on the track and placed in the desired sector, is the sum of average seeks time (on the track), while read / write and the average latency (seen in the sector).
* Average Seek Time: Average time it takes for the needle placed in the desired track is half the time taken for the needle to go from the track more peripheral to more central disk.
* Time read / write: Average time it takes for the disk to read or write new information, the time depends on the amount of information you want to read or write, the block size, the number of heads, lap time and the number of sectors per track.
* Average Latency: Average time it takes for the needle placed in the desired sector, is half the time spent on a full disk rotation.
* Speed: revolutions per minute of the dishes. The higher the speed of rotation, lower average latency.