Behind the excellent reading and writing performance of SSD

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Choosing which hardware to use to back up your precious files has always been a troublesome issue for every file manager. With the advancement of technology, the unit price per TB of solid-state drives ("SSD") has gradually decreased, and Because files are stored in NAND flash memory, there is no need to wait for motor rotation and head movement like traditional mechanical hard disks (HDDs). Therefore, they have much higher read and write speeds and lower power consumption than mechanical hard disks. When NAS sets up a disk array (RAID) and the budget is sufficient, it has become the choice of most people to use SSD to build a disk array and enjoy fast file access speeds. However, due to the innate structure of NAND particles, compared with traditional mechanical hard disks, if SSD is used for cold backup of files, the SSD may cause potential risk of file loss if the SSD is not powered on for a long time. The following will introduce the storage principles of SSD, and list the causes of this situation and corresponding strategies to make your valuable files more secure.


The storage principle of SSD and the situations that may cause file loss
NAND flash memory records data by storing electric charges in semiconductor elements. By changing the level of the potential, the 0 and 1 states of the data bits are changed to write or erase data. However, the internal charge may slowly drain or cause the potential to change due to the following conditions:

Physical aging:

Over time, the physical structure of NAND flash memory cells may gradually degrade, causing their ability to hold charge to decrease.



Leakage:

When not in use, charge-storing components may uae whatsapp phone number slowly lose charge due to small imperfections in the semiconductor material, such as extremely tiny cracks or defects.



Read-Write Wear:

As the number of read and write times (P/E cycles) increases and a large number of read and write operations are performed on the flash memory, the aging of the flash memory unit will be accelerated.



Storage temperature is too high:

Storing SSDs at high temperatures may accelerate hardware aging and cause the loss of internal charge.