Question

When computer needs to read data located on hard disk drive, there are two methods which may be used to locate the required data. Compare and contrast the two methods sequential access and random access? What are tracks, sectors, clusters and cylinders in hard disk drive? Why Solid-State drives are considered faster in data retrieval and seeking time?

Answer 1

Answer:

When computer needs to read data located on hard disk drive, there are two methods which may be used to locate the required data. They are as follows: 1. Sequential access 2. Random access Sequential

Answer 2

When the data read or write information to the file in an order that is sequential access, and in random access, it can access from anywhere in the file.

• Sequential access method performs based on sequential order, whereas in the random access method there is no particular order.
• Sequential access method allows the access to start from the first element only, then after checking the next element in order.
• In the random access method no need to start from the first element, can access any element based on the index number or address.
• Looks like an annual ring of a tree is the appearance of the tracks, which are tightly packed circles.
• Each platter of the disc is broken into different tracks, the number starting from zero on the outer side, the number goes increasing to the inner side of the platter.
• The track is also again broken down into smaller portions which act as the basic memory area, which is known as the sector.
• The group or collection of such smaller memory space or sector is the cluster.
• The track count on each side of the platter is known as a cylinder.
• Unlike hard drivers the SSDs have no moving or spinning part.
• In the case of hard drives they need to move and locate the location to read or write, but Solid-state drives it does not have any moving parts, which makes it faster.

#SPJ3