What is SSD?
SSD is the abbreviation for Solid State Drive or Solid State Disk, is a data storage device that uses a variety of ICs such as memory used to store data or information.
SSDs integrate silicon-based memory chips as storage media for writing and reading persistent data. SSDs, also known as flash drives or flash cards, are inserted into slots on server computers – called server side flash storage – or as part of various corporate flash storage systems.
As an analogy, we may be familiar with USB flash drives or USB thumb drives or USB memory sticks. The electronic device that we use to store data that we often carry is plugged into the computer’s USB terminal when it wants to retrieve or store data.
SSD can be considered an advanced version of a much larger capacity USB flash drive and acts as a replacement for the hard drive used on computer devices.
So, SSD is an electronic device that works to store data such as hard disk (HDD: Hard Disk Drive), but its construction is like a USB Flash Drive that consists of multiple ICs as memory.
Like the USB Flash Drive, SSD also does not have a moving component in it. Data or information is only stored on microchips. Unlike the hard drive that has a mechanical arm that moves here and there to write and read data on a magnetic disk. This difference makes SSDs work much faster than hard drives.
Hard drives (HDD) move mechanically to collect and store data or information, while SSDs move electrically to store and retrieve data or information. Of course SSDs work faster than HDDs.
Solid state component
Generally, SSDs use what is called NAND-based flash memory. This is a type of non-volatile memory. In short, nonvolatile means that the memory can still store data even if the supply voltage is off. This is the basic principle of permanent memory, just like a USB flash drive.
At first, many doubted the robustness of the data stored in this type of memory. They assume that the data can only be stored for a few years. Data disappears if stored longer. But reality is not the case, especially with the latest technology. Even data can be stored securely for up to 200 years.
So far, hard disk or often abbreviated HDD has become the standard storage medium for desktops and laptops. As technology evolves, storage media also evolves. Currently, what is being discussed is SSD, which is a development of HDD technology.
Basically, SSD is the same as HDD. It’s just not stored on magnetic layers like HDD. SSD stores all data on interconnected flash memory chips. Flash memory on SSDs is clearly different from what is used on Flash disks in terms of type and speed. The flash memory chip on SSD has a higher speed than flash disk. With the same capacity, the price of SSD is much more expensive than Flashdisk.
Different Between HDD and SSD
Components or materials found on the HDD, such as platter, head, etc. greatly affect the size or dimensions and weight of the HDD itself. Because HDD technology is very dependent on disk rotation, this makes a limit on how small HDDs can be produced. While SSDs are free from these restrictions, so the size of SSDs can be depreciated along with the times.
The available SSD is 2.5 inches, which means this SSD is only intended for laptop use. As the size of the laptop gets smaller and the number of tablet PC users explore the web, you will see SSD capabilities that can easily adapt to the size of the laptop / tablet.
Without moving parts, SSD products are the thinnest storage option available. Moving parts are especially good for thin and light PCs and complex and industrial designs. For standard notebooks, SSDs are available in 5 mm and 7 mm height. By comparison, hard disks are available in standard 7 mm and 9.5 mm designs.
Responese when used
HDD applies mechanical elements, resulting in bad side effects including:
– High power consumption
-Motor rotation and the disc cause high noise on the SSD, because it has no mechanical elements, the effect is:
-SSD heat or temperature is not as high as the HDD.
-Electricity consumption is very small, SDD needs enough power less than 1 watt while the HDD requires power reaching more than 10 watts
-There is no motor rotation and the disk makes SDD not at all noisy.
Speed of write
Data Read and Write Speed
SSDs provide peak performance for booting and high read / write performance to support computing that requires better multitasking capability. In this section SSD shows a very significant difference. SSD read and write speeds are even 8 times faster than HDD. SSD installed PCs can go through a boot process in seconds, certainly not exceeding 1 minute. While the time needed for a longer HDD depends on specifications, and certainly not faster when compared to SSD.
One contributing factor is that SSDs do not use rotating discs or mechanical factors severely limit the electronic capabilities of the HDD.
SSDs look more durable just because of the solid state design. Without moving parts, SSDs can withstand bumps, falls, and higher extreme temperatures.
Because of its spiral shape, HDD is very good for storing large files located in adjacent blocks. And when the HDD capacity starts to full, the files that have been stored can be scattered, this is what is known as fragmentation.
The effect of fragmentation is the decrease in performance of the HDD itself. In this situation, to restore the performance of the HDD, we usually do defrag to restore it. Whereas on SSD we don’t need to bother thinking about the quiet issue of fragmentation because the data is stored on a flash chip.