Differences between SSD and HDD:
Hard disk drive is a nonvolatile storage device used in both computers and laptops. So that it retains the data in the system even when there is no power. These are metal platters with a magnetic coating. Coating stores the data, whether that data consists of weather reports, digital music collection, audio, video etc. It consists of read and writes head on an arm so that it accesses the data while platters are spinning in hard drive enclosure. It is typically faster and better, the precision and speed of the HDD drive is also high so that it has the capacity to store large amount of data in a small area.
SSD stands for solid state drive. When compared to hard disk drives these are traditional disk based hard drives. The functionality of SSD is same as HDD but there is small difference in storing the data. Instead of magnetic coating on the top of their platters, the data is stored in the form of interconnected flash memory chips. These chips may be installed permanently on system’s mother board, on PCI cards, etc. It has no moving components like spinning disks, read and write heads etc. It makes use of NAND flask memory to store the data. SSD’s are noiseless, less susceptible to physical shocks, etc.
Advantages and Disadvantages of HDD and SDD:
Both SSD and HDD’s have same functionalities. Like they boot the system, store the applications, store the important files, etc.
- Price: SSD’s are more expensive than HDD’s in terms of rupees per GB. For the storage of 1TB internal 2.5 inch drive, you have to pay Rs 4000 for HDD whereas SDD charge Rs 6000.
- Fragmentation: Because of their recording surfaces, hard disk drives works better with larger files that are laid down in contiguous blocks. So that in one continues motion the drive head can start and end its read. When hard drives are starting to fill up, large files can become scattered around platter of the disk, which is known as fragmentation. While read and write algorithms have improved so that the effect is minimized, the fact is that HDDs can become fragmented, while SSDs doesn’t care where the data gets stored in the memory chips, since it doesn’t consists of physical read head. Thus, SSDs are inherently faster.
- Durability: An SSD has no moving parts, so that it keeps the data safe even when the laptop is dropped or shaken, etc. while it is operating. Most of the hard drives park their read and write heads when the system is off, but when they are in operation, they are flying over the drive platter at hundreds of miles an hour. Besides, even the parking brakes have limits. If you’re rough on your equipment, an SSD is strictly recommended.
- Availability: Hard drives are simply more plentiful. There are many brands of HDD’s like Seagate, Toshiba, Western Digital, Samsung, and Hitachi, etc. than the SDD’s models than SSDs.
- Overall: As from the above advantages and disadvantages HDDs win on capacity, price, and its availability. SSDs are best if the ruggedness, form factor, speed, noise, or fragmentation is important factors to you. If it weren’t for the cost and capacity issues, SSDs would be most preferable.