Discuss disk access time with its requirements.
What will be an ideal response?
Answers will vary. The total time that it takes for a hard drive to read or write data is called the disk access time and requires the following:Seek time-The read/write heads move to the cylinder that contains (or will contain) the desired data.Rotational delay-The hard disks rotate into the proper position so that the read/write heads are located over the part of the cylinder to be used.Data movement time-The data moves, such as reading the data from the hard disk and transferring it to memory, or transferring the data from memory and storing it on the hard disk.A typical magnetic disk access time is around 8 milliseconds (ms). To minimize disk access time, magnetic hard drives usually store related data on the same cylinder. This strategy reduces seek time and, therefore, improves the overall access time. Because solid-state drives (SSDs) do not have to move any parts to store or retrieve data, they do not require seek time or rotational delay, and their access time is much faster than magnetic hard drives-essentially instantaneous at about 0.1 ms. Please see the section "Storage Systems" for more information.
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What will be an ideal response?