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Four points about SSD hard drive
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Steve Kowalsky
What is SSD
Many friends may not be aware of it, and in fact the SSD is that of the hard disk (solid state drives), which is defined as the hard disk made by using solid state electronic storage chip array, which consists of a control unit and a storage unit (flash chip, DRAM chip). Solid hard disks are identical in their specifications and definitions of interfaces, their functions and methods of use to those of normal hard disks, and in their product form and dimensions to those of normal hard disks.It is widely used in military, vehicle, industrial control, video monitoring, network monitoring, network terminal, power, medical, aviation, navigation equipment and other fields.SSD solid state drive (SSD) currently occupies a very high position in the hard disk market.
SSD classification
Since solid-state hard disk technology is different from conventional hard disk technology, quite a few emerging memory manufacturers have been generated. The manufacturers can make solid-state hard disks just by purchasing NAND memory, fitting with the appropriate control chip. The next generation of solid-state hard disk universally uses the sata-2 interface, sata-3 interface, SAS interface, msata interface, PCI-E interface, ngff interface, CFAST interface, and sff-8639 interface. The storage medium of solid-state hard disks is divided into two types, one employing fl ash fl akes (flash chip) as the storage medium, and the other employing dram as the storage medium.
1.Solid state hard disk based on flash memory
Flash-based solid-state hard disks (IDE FLASH DISK, Serial ATA Flash Disk): FLASH chips are used as storage media, which is also commonly referred to as SSDs. Its appearance can be made into a variety of styles, such as notebook hard disk, micro hard disk, memory card, U disk, and so on. The strongest advantage of this SSD solid state hard disk is that it can be moved, and the data protection is not controlled by the power supply. It can be adapted to various environments, but it has a low service life and is suitable for personal users. In flash-based solid-state hard disks, storage units are divided into two categories: SLC (Single Layer Cell single-layer unit) and MLC (Multi-Level Cell multi-layer unit). SLC is characterized by high cost, small capacity, but fast speed, while MLC is characterized by large capacity and low cost, but slow speed. Each unit of MLC is 2 bits, which is almost twice as large as SLC.
However, since each MLC storage unit stores more data and is relatively complex in structure, the probability of errors increases, and error correction is required, resulting in a large performance lag behind that of simple SLC flash memory.In addition, the advantage of SLC flash memory is that the number of copies can be as high as 100,000, which is 10 times higher than MLC flash memory. In addition, to ensure the lifetime of MLC, control chips check and smart wear balance technology algorithms, so that the number of writes per storage unit can be shared equally to 1 million hour failure interval (MTBF).
2. DRAM-based SSD solid state hard disks
DRAM-based solid-state hard disks: DRAM is used as storage media and has a narrow application range. It mimics the design of traditional hard disks, can be set up and managed by file system tools of most operating systems, and provides industry-standard PCI and FC interfaces for connecting hosts or servers. There are two types of applications, SSD hard disk and SSD hard disk array. It is a high performance memory and has a long life. The disadvantage is that it needs a separate power supply to protect the data security.
As a hard disk using NAND as storage medium, SSD is ten times faster than traditional disc mechanical hard disk theory. Upgrading from mechanical hard disk(ssd) to solid state hard disk can greatly improve the speed of computer on/off, the speed of software loading and the fluency. However, some netizens often say that after upgrading the solid state hard disk, their computer does not feel faster or slower. What’s wrong? Next, let’s get your computer in control!
The importance of properly installing SSD interfaces is ignored
If you are using a laptop, make sure that the extension interface of the motherboard provides SATA 2, SATA 3, or M.2 interfaces, which directly affects whether the SDD you add will run at normal read/write speed. Generally, the reading and writing speed of SSD of SATA3 interface can reach about 500 MB/s, and can only reach up to 300 MB/s on SATA2. The theoretical speed is nearly twice as fast, so it is necessary to pay attention to the correct corresponding interface when adding SSD to the computer.
Some users like to take their notebook’s CD-ROM drive apart and transfer it to a hard disk, but many notebooks have only SATA 2 as the CD-ROM interface, which can make it less effective to install a solid-state hard disk. Due to the speed limit of the interface, high-speed SSD speed cannot be used. Half of these users are advised to change the installation location of the CD-ROM drive to the secondary drive (mechanical hard disk) and the hard disk to the SSD when installing SSD.
In addition, many new notebooks are now equipped with M.2 interface. When installing M.2 interface SSD, users also need to see if the interface supports PCI-E channel. The relevant NVMe drivers need to be installed correctly to avoid unstable data reading and machine jamming.
What interfaces and protocols are supported by the motherboard can generally be consulted in the product description. PC Xiao Bai suggests choosing the latest Core 8th Generation notebook or using Z300 Series Chip notebook, which upgrades the SATA 3 interface completely and supports the NVMe M.2 interface SSD. It is very convenient to install the driver automatically under Win10 operating system.
Common data is not installed on SSD disks
solid state drive don’t end up on your computer, and the speed at which data is read still depends on where you save the source address. When multiple hard drives are mixed and matched, for example, SSD + HDD is often chosen. If the data is still stored in HDD, it is still futile.
Solution: Reload the system and migrate the data using the newly installed SSD
The capacity of SSD is too small
To improve lifetime, SSDs(ssd) are usually erased only after the data has been fully written to its maximum capacity once, but when this process occurs, the performance of SSDs can be severely affected. Therefore, if the capacity is insufficient and often needs to be erased, the effect will be discounted.
Solution: Select large capacity SSD.
SSD are not optimized, such as no 4K alignment
Solid state hard disk 4K alignment is very important. The so-called 4K alignment actually refers to 4K advanced formatting, which requires 4K alignment of hard disk sectors. The 4K Advanced Formatting Standard specifies that the hard disk sector size is migrated from the current 512 bytes to 4096 bytes (or 4K). This change will improve formatting efficiency, which will help the hard disk to provide higher capacity while providing improved error correction.
When partitioning, it is important to check the 4K alignment. If you find that your SSD does not have 4K alignment, you can search for and download the software Paragon Alignment Tool above to make a lossless 4K alignment for your SSD.
These are the reasons and solutions for whether your computer is slow with a solid state hard disk, especially the 4K alignment problem. After checking these problems, users are confident that the speed will be greatly improved so that your computer can fly smoothly.
