Solid-state drives have the following advantages over regular hard drives: 1. Fast startup, no motor to accelerate the spinning process. 2. No magnetic head, fast random reads with 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, both almost half of the gap. 3. Relatively fixed read time. Since addressing time is independent of where the data is stored, disk fragmentation does not affect read times. 4. DRAM-based SSDs are extremely fast to write to. 5. No noise. Because there is no mechanical motor or fan, the noise level is 0 dB during operation. Some high-end or high-capacity products are equipped with a fan, so noise is still generated. 6. 6. Low-capacity flash-based SSDs consume less energy and generate less heat during operation, but high-end or high-capacity products consume more energy. 7. There are no mechanical moving parts inside, so there will be no mechanical failure, and there is no fear of collision, shock, or vibration. So that even in high-speed movement or even with the flip tilt will not affect the normal use of the situation, and in the laptop accidentally dropped or collided with hard objects can minimize the possibility of data loss. 8. Wider operating temperature range. Typical hard disk drives only operate in the 5 to 55°C range. Most SSDs can operate in temperatures from -10 to 70°C, and some industrial-grade SSDs can operate in temperatures from -40 to 85°C or even greater (e.g. -55 to 135°C for RunCore military-grade products). 9. Low-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.
Solid-state drives have the following disadvantages over traditional hard drives High cost. The price per unit of capacity is 5 to 10 times (flash-based) or even 200 to 300 times (DRAM-based) that of a traditional hard disk. 2. Low capacity. Currently, the maximum capacity of SSDs is much lower than that of traditional hard disks. The capacity of traditional hard disk is still growing rapidly, and IBM has reportedly tested a 4TB traditional hard disk. 3. Because they are not shielded in a Faraday cage like conventional hard disks, SSDs are more susceptible to the adverse effects of certain external factors. For example, power outages (especially for DRAM-based SSDs), magnetic field interference, static electricity, etc. 4. Limited write life (flash-based). Typical flash memory has a write life of 10,000 to 100,000 times, and customized ones can have a write life of 1,000,000 to 5,000,000 times, however, 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 customized file system or firmware can share the write locations, giving the SSD an overall lifespan of 20 years or more. 5. Difficult to recover from data corruption. Once the damage occurs in the hardware, if it is a traditional disk or tape storage method, you may still be able to save some of the data through data recovery. But if it is solid state storage, once the chip is damaged, it is almost impossible to retrieve the data from the chip that is broken into several pieces or pierced by the 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. Due to the current high cost of SSDs, the use of this method of backup is still expensive. 6. According to actual tests, the use of solid-state drives in the idle or low load operation of the laptop, the battery voyage is shorter than the use of 5400RPM 2.5-inch traditional hard disk. 7. 7. DRAM-based SSDs consume more energy than traditional hard disks at all times, especially when they are turned off and still require power, otherwise data is lost. 8. Users have reported that MLC-based SSDs may occasionally crash when running under Windows XP. This is due to the fact that the file system mechanism of Windows XP is not suitable for SSDs. Windows 7 is optimized for SSDs and disables traditional hard drive mechanisms such as SuperFetch, ReadyBoost, and boot and program prefetching to better leverage the performance of SSDs.