3.

Explain with the help of a diagram how the IO devices coordinate with the processor, main memory, and cache.

http://www.cse.iitm.ac.in/~vplab/courses/comp_org/Input_Output_Organization_11.pdf

B. Given the following specifications, calculate the average time for reading 1kb sector (of data) on disk into main memory:

Disk speed - 15000 rpm, average seek time = 5ms, data transfer rate = 100MB/sec, and controller overhead = 0.1ms

C. Describe the RAID3 and RAID4 disk systems clearly bringing out their differences, particularly with respect to writing new data blocks.