ssd hard disk vs hard drive Ssd 120gb ssd 240gb ssd 512gb ssd 1tb ssd 2tb扬加勒
Based on this latitude, common SSD can be classified into three types: SATA, M.2, and PCIE.
The conclusions below are based on the control variable (type of interface), and all other conditions are equal by default.
SATA 2.5-inch solid-state disks have the same interface as the current mechanical disks on the market. They both have a power supply interface and a SATA3.0 data interface.
This type of SSD is also the early form of SSD.ssd hard disk
SSD with the M.2 interface are the favorite products of computer manufacturers in recent years. When used, they can be inserted directly into the motherboard interface and fixed with screws.
Both size and installation convenience are better than traditional 2.5-inch SOLID-state drives.
It should be noted that the M.2 interface supports both SATA and PCIE channels. If it uses the SATA bus on the mainboard, its performance is not significantly different from that of the traditional SOLID-state disk, while the M.2 interface SSD that uses the PCIE bus on the mainboard is the product with better performance.
The IDE protocol is a very old transport protocol for mechanical hard disks, and there is no need to discuss it.
ALTHOUGH the AHCI protocol performs better, it is only for mechanical hard disks and was born.
SATA protocol is the most widely used transmission protocol, faster transmission speed, high execution efficiency, but also support hot swap, currently on the market most of the hard disk or use SATA protocol, SATA 3.X has basically met all the needs of the civil market.
NVMe is a transport protocol specially developed for flash memory products. It is the optimal solution of SSD transport protocol, which can give full play to SSD performance and reduce latency.
Is the preferred SSD protocol for the M.2 interface.ssd hard disk
Flash-based SOLID-state drives (SSDS) are the main category of SSDS. Their internal structure is very simple. The main body of SSDS is actually a PCB board, and the basic accessories of this PCB board are the control chip, the cache chip (some low-end hard drives have no cache chip) and the flash chip for storing data.
Main control chip.ssd hard disk
Common SSDS in the market include LSISandForce, Indilinx, JMicron, Marvell, Phison, Sandisk, Goldendisk, Samsung and Intel and other master chips.
The master chip is the brain of the SSD. Its function is to reasonably allocate the load of data on each flash chip, and to undertake the whole data transfer and connect the flash chip with the external SATA interface.
The ability difference between different master is very big, in the data processing ability, algorithm, read and write control of the flash chip will be very different, which directly leads to the performance gap of SSD products up to several times.
ssd hard disk.Cache particles
Next to the master chip is the cache particle. Like traditional hard drives, SSDS need high-speed cache chips to assist the master chip in data processing.
It is important to note that there are some low-cost SOLID-state drive solutions that do not use this cache chip to save costs, which can have a certain impact on the performance, especially the read and write performance and service life of small files.
ssd hard disk.Flash memory chips
Except for the main control chip and the cache chip, most of the other positions on the PCB are NAND Flash chips.
NAND Flash memory chips are divided into SLC (single-level Cell) , MLC (multi-level Cell) , TLC (Trinary Level Cell),
Three-layer Cell)  and QLC (Quad-level Cell, four-layer Cell).
Another eMLC (Enterprise Multi-level Cell) is an “enhanced” version of MLC NAND flash memory, which to some extent Bridges the performance and durability gap between SLC and MLC.