What are the relative advantages and disadvantages of SSDs and HDDs?

Question

What will be an ideal response?

Answer 1

HDDs (hard disk drives) are very cheap indeed in terms of storage. They suffer several disadvantages:
They are power hungry because of the rotating platter. They are slow because of the rotational latency and access time. They are physically vulnerable to shock because of the head?surface height. They are relatively bulky.
Solid state storage consumes less power, has no rotational latency or seek time (just the access time of flash memory). SSDs are not susceptible to shock (flash memory is used in aircraft black box recorders). They are smaller than disk memory and can be built into any circuit (they don’t have to be in a disk sized box).
However, SSDs are currently very expensive in terms of cost per stored byte.
One disadvantage of the flash memory used in SSDs is that the storage mechanism is error prone and has a limited life time in terms of the number of write cycles that can be carried out. Moreover, it has been reported that flash memory is reaching its maximum theoretical density.