To put it in another way drive data remains in an inaccessible state. If right actions are not implemented on time, it can prove to be burdensome at later stages when your data gets completely damaged. Another possibility could be drive head problems and some corruption issues stinging around storage disk that needs to be resolved. If it gets any sort of damage then drive will eventually get corrupt – letting partial access to saved data on storage device. It is responsible for read/write and data access operations on drive.
A firmware is a software that is written to hard disk platters and plays a vital role for proper functioning of hard disk. It is an indication that there is some trouble in a part of firmware. What could make hard drive to show less space? Of course, there are quite number of chances that data on such drive can be affected at times. This could even give rise to some doubts whether data residing on hard drive are safe or not.
You might wonder what might have gone wrong with the disk for showing such unusual behavior. Indeed, it sounds like a serious matter when system hard drive shows wrong size capacity.