Currently, due to its high cost, it is gradually being popularized in the DIY market. Because SSD technology is different from traditional hard disk technology, it has given rise to a number of emerging memory manufacturers. Manufacturers can build SSDs by simply purchasing NAND memory and matching it with the appropriate control chip. The new generation of SSDs commonly use the SATA-2 interface.
There are two types of storage media for SSDs, one using flash memory (FLASH chips) as the storage medium and the other using DRAM as the storage medium.
Solid state drives have the following advantages over regular hard disks:
Fast startup
No motor to accelerate the spinning process.
Small read latency
No magnetic heads, fast random reads, minimal read latency. According to the relevant tests: two computers in the same configuration of the computer, equipped with solid state hard disk notebook from boot to appear desktop a *** only 18 seconds, while equipped with a traditional hard disk notebook total *** with 31 seconds, the two almost have almost half the difference.
Fragmentation doesn't affect read times
Relatively fixed read times. Since addressing time is independent of where the data is stored, disk fragmentation does not affect read times.
Fast write speeds
DRAM-based SSDs are extremely fast to write to.
No noise
Because there are no mechanical motors or fans, the noise level during operation is 0 dB. Some high-end or high-capacity products are equipped with a fan, so noise will still be generated.
Lower heat generation
Low-capacity flash-based SSDs consume less power and generate less heat during operation, but high-end or high-capacity products will consume more.
No mechanical failure
There are no mechanical moving parts inside, so no mechanical failure will occur, and there is no fear of collision, shock, or vibration. This means that even when moving at high speeds or even when tilted over, normal use will not be affected, and the possibility of data loss can be minimized if the laptop is accidentally dropped or collided with a hard object.
Larger operating temperature range
Typical hard drives only operate in the 5 to 55 degree Celsius range. Most SSDs can operate in temperatures from -10 to 70 degrees Celsius, and some industrial-grade SSDs can operate in temperatures from -40 to 85 degrees Celsius and beyond (e.g. -55 to 135 degrees Celsius for RunCore military-grade products).
Smaller and lighter
Lower-capacity SSDs are smaller and lighter than drives of the same capacity. However, this advantage diminishes as capacity increases. Up to 256GB, SSDs are still lighter than regular hard drives of the same capacity.
[edit]Disadvantages of SSDs
SSDs have the following disadvantages when compared to traditional hard drives:
High cost
Price per unit of capacity is 5 to 10 times (flash-based), or even 200 to 300 times (DRAM-based) more expensive than traditional hard drives.
Low capacity
Currently the maximum capacity of SSDs is much lower than that of traditional hard disks. The capacity of traditional hard disks is still growing rapidly, and IBM has reportedly tested a 4TB traditional hard disk.
Susceptibility to external influences
Because they are not shielded in a Faraday cage like traditional hard drives, SSDs are more susceptible to the adverse effects of certain external factors. Such as power outages (especially in DRAM-based SSDs), magnetic field interference, static electricity, and so on.
Limited write life
Write life is limited (flash-based). Typical flash memory has a write life of 10,000 to 100,000 cycles, and specialized ones can have a write life of 1,000,000 to 5,000,000 cycles, yet some parts of the file system (such as the file allocation table) will still be written to more than this limit throughout the life of the computer. A purpose-built file system or firmware can share the write locations, giving SSDs an overall lifespan of 20 years or more.
Data is difficult to recover
Data is difficult to recover from corruption. Once damage occurs in the hardware, if it's a traditional disk or tape storage method, you may still be able to salvage some of the data through data recovery. But with solid state storage, once a chip is damaged, it's almost impossible to recover data from a chip that's been broken into pieces or pierced by electrical current. Of course, this shortcoming can be sacrificed to make up for the storage space, the main use of RAID 1 to realize the backup, and the traditional storage backup principle is the same. Because of the current high cost of SSDs, it is still expensive to backup in this way.
Shorter battery life
Based on real-world testing, laptops using SSDs have shorter battery life than 2.5-inch traditional hard drives with 5400 RPM when running at idle or low loads.
Higher power consumption
DRAM-based SSDs consume more power than traditional hard disks at all times, especially when they are turned off and still require power or data loss.