Please answer the following questions (1 -3): A magnetic disk drive has 1, 024 b
ID: 3572171 • Letter: P
Question
Please answer the following questions (1 -3):
A magnetic disk drive has 1, 024 bytes per block and 2, 048 blocks per track. Each surface has 65, 536 tracks and there are two surfaces (one platter). What is the capacity of this disk in megabytes? Show your work, (note: the problem was constructed such that it can be worked without a calculator. Describe the function of the Memory Data Register (MDR) Explain why access to a file that's stored contiguously on a magnetic disk is faster than access to a file not stored contiguously.Explanation / Answer
1.
capacity of the disk can be calculated as:
capacity=2 * no of platters * tracks per platter * sectors * bytes per sector
=2 * 1 * (2 * 65536) * 2048 * 1024
=549755813888 bytes
=524288 MB
2.
A MDR is the register from control unit that contains the data to be stored in the computer storage, or data after a fetch from the computer storage.The MDR is a two-way register
3.
Contiguous files are the files on disk that is not broken apart.
One sector is adjacent to another. And hence contiguous file is faster to read and write than one that is non contiguous.