Question 1: Why are solid-state drives so fast? principle? Because solid-state drives are made of advanced integrated circuits, unlike mechanical hard drives that require motors to run. I hope you will adopt them.
Question 2: What is a solid-state drive? Why do solid-state drives transfer data so quickly? Features
1. Fast reading and writing speed. Using flash memory as the storage medium, the reading speed is faster than that of mechanical hard drives. SSDs do not use magnetic heads and their seek time is almost zero. The sustained writing speed is very astonishing. Most current SSD manufacturers will claim that the sustained reading and writing speed of their SSDs exceeds 500MB/s. This is quite impressive compared to the 100MB/s speed of mechanical hard drives.
The speed of solid-state drives is not only reflected in continuous reading and writing. Fast random reading and writing speed is the ultimate secret of solid-state drives, which is most directly reflected in most daily operations. Related to this is the extremely low access time. Currently, the fastest mechanical hard drive is about 14 milliseconds, while the solid state drive can easily reach 0.1 milliseconds or even lower.
2. Physical characteristics, low power consumption, no noise, anti-vibration, low heat, small size, wide operating temperature range. SSDs have no mechanical motors and fans, and the noise level is 0 decibels when working. Flash memory-based SSDs consume less energy and generate less heat during operation (but high-end or large-capacity products will consume more energy). There are no mechanical moving parts inside, there will be no mechanical failure, and there is no fear of collision, impact, or vibration. A typical hard drive can only operate within a range of 5 to 55 degrees Celsius. Most solid-state drives can operate at -10~70 degrees Celsius. Solid-state drives are smaller and lighter than mechanical hard drives of the same capacity.
Mechanical hard drives do not have these advantages. Solid-state drives are more durable, cooler, more shock-resistant, and more portable than mechanical hard drives. Therefore, solid hard drives can be widely used in military, automotive, industrial, medical, aviation and other fields.
3. Low price/capacity ratio. This refers to the ratio between capacity and price. Compared with solid-state drives, the price-capacity ratio of mechanical hard drives is indeed incredibly low. In the past, the price of a 1TB mechanical hard drive was around 700 yuan, with an average price of 0.36 yuan/GB. At present, the price of 128G solid-state hard drive on Taobao has dropped to about 750 yuan, and the price will continue to drop.
4. Lifespan limit. Solid state drive flash memory has the problem of limited erasing and writing times, which is why many people criticize its short lifespan. A complete erasure of flash memory is called 1 P/E, so the life of flash memory is measured in P/E units. The lifespan of 34nm flash memory chips is about 5,000 P/E times, while the lifespan of 25nm is about 3,000 P/E times. Does it seem like your lifespan is shorter? This is true in theory, but with the improvement of SSD firmware algorithms, new SSDs can provide less unnecessary writes. Let’s take another specific example. For a 120G SSD, writing a 120G file is considered a P/E. Under normal use, even if an ordinary user writes 50G every day and completes P/E once every 2 days, there will be 180 P/Es in a year. You can calculate by yourself how many years 3,000 P/E will last. I believe that by then, the solid-state drive will have been replaced by some other novelty.
Other features
At present, the interface specifications and definitions, functions and usage methods of solid-state interconnection disks are the same as those of ordinary hard disks, and the product appearance and size are also consistent with ordinary hard disks. The operating temperature range of its chip is very wide (-40~85 degrees Celsius).
At present, the main factor hindering the popularity of SSD solid state drives is the product price. The current price of 64GB SSD products on the market is about US$400, while the price of 128GB products is about US$800. Calculated, the price per GB is around US$6, which is still nearly 20 times higher than the current price of US$0.25~0.4 per GB for traditional mechanical hard drives.
Secondly, the capacity of SSD solid-state drives cannot fully meet the needs of users.
Thirdly, the lack of support from terminal devices is another major problem faced by SSD solid-state drives.
In addition, although each sector of the current SSD can be read and written repeatedly 100,000 times, some applications, such as the LOG record of the operating system, may read a certain sector multiple times. Write, and in this case, the actual life of the SSD has not been tested. However, through the management of storage cells by balancing algorithms, their life expectancy will be extended.
In reality, SDD solid-state drives are used in notebooks. Firstly, they can increase the speed of startup and shutdown, and speed up the reading of data. For office workers, they can save a lot of time. Secondly, they make a lot of noise when working. Low, compared to ordinary mechanical hard drives, almost zero, allowing you to... >>
Question 3: Why are solid-state drives faster than mechanical hard drives? Because mechanical hard drives are affected by the platter Due to rotation speed and seek speed limitations, the current continuous read and write speed of a single hard disk cannot exceed the speed of SATA2.0 (the burst speed may be higher), although the interface is SATA3.0. The internals of solid-state drives are actually similar to the multi-channel mode of RAID0 mode (the speed of mechanical hard drives will be greatly improved if multiple hard drive groups are used in RAID0, but the data security is significantly lower than that of a single hard drive), and the read and write latency of flash memory particles is low. Therefore, the continuous read and write and random read and write speeds are higher than those of mechanical hard disks. With the gradual introduction of SSDs using PCI-E channels, the continuous read and write speeds are more than 2G/S, which is far from the 200M/s of mechanical hard disks with a speed of 7200 rpm. S speed.
Question 4: Why does the computer become faster after replacing the solid state drive? The answer is as follows:
The benefits of solid state drives and the differences between solid state drives and ordinary hard drives
1. Quick start, no motor acceleration and rotation process.
2. No need for magnetic heads, fast random reading, and minimal read delay. According to relevant tests: When two computers have the same configuration, the notebook equipped with a solid-state drive only takes 18 seconds from booting to the desktop, while the notebook equipped with a traditional hard drive takes a total of 31 seconds. There is almost a gap of nearly half.
3. Relatively fixed reading time. Because seek time is independent of where the data is stored, disk fragmentation does not affect read times.
4. DRAM-based solid state drives have extremely fast writing speeds.
5. Low-capacity flash memory-based SSDs have low energy consumption and heat generation during operation, but high-end or large-capacity products will consume higher energy.
6. There are no mechanical moving parts inside, there will be no mechanical failure, and there is no fear of collision, impact, or vibration. This will not affect normal use even when moving at high speed or even with flipping and tilting, and it can minimize the possibility of data loss when the laptop is accidentally dropped or collides with a hard object.
7. Wider operating temperature range. A typical hard drive can only operate within a range of 5 to 55 degrees Celsius. Most solid-state drives can work in -10~70 degrees Celsius, and some industrial-grade solid-state drives can also work in -40~85 degrees Celsius, or even larger temperature ranges.
Question 5: Why does the SSD solid-state drive have a larger capacity and a faster read and write speed? Because the SSD is composed of multiple storage chips, the larger the capacity, the greater the number of chips. The reading and writing speed of each chip is the same, but the reading and writing speed of multiple chips is faster. c
Question 6: Why does it not feel faster after installing a solid-state drive? Installation of the solid-state drive
1. 4K alignment of the solid-state drive
You can use win7 system Partition and format the solid-state drive, or use the hard disk partition tool Diskgen software (at least version 3.7 or above) to align the solid-state drive to 4K.
2 Turn on the hard disk AHCI function
At present, most desktop computers are in IDE mode by default. To turn on the hard disk AHCI mode, you need to enter the Bios and set it up. Most notebooks already use AHCI mode by default.
The general steps to enter the BIOS to turn on the AHCI mode of the hard disk are: Restart the computer, press the Del key to enter the BIOS when starting the computer, select Devices→ATA Drives Setup→Configure SATA as→AHCI, and finally press the F10 key to save And exit the BIOS
In addition to the above two basic important knowledge points, there are also other aspects that have a greater impact, such as turning on the energy-saving function of the motherboard and mistakenly connecting the third-party SATA3 Interfaces, etc. will have a great impact on the speed of solid-state drives, which are introduced below.
1) When the motherboard turns on the energy-saving mode, the performance of the solid-state drive decreases.
Usually when the energy-saving function of the motherboard is turned on, the frequency of the CPU will be reduced, which will also cause the performance of the solid-state drive to decrease. , because the CPU frequency is reduced by 10% during energy saving, and instructions are sent 10% slower. Therefore, the theoretical SSD performance will be reduced by 10% during the test. Therefore, if you want to maximize the performance of the solid state drive, please do not turn on the energy saving mode of the motherboard.
2) Misconnection of the third-party SATA3 interface affects performance
Many mainstream motherboards now support the SATA3.0 interface, such as Intel's B75 or above motherboards and AMD's A75 or above motherboards. There are SATA3.0 interfaces, which are also very important for solid-state drives. If the motherboard we choose does not support the SATA3.0 interface (for example, motherboards below H61 or A55 do not contain SATA3.0 interfaces), then the performance of the solid-state drive will be affected. The impact is greater. On the other hand, the test results of the third-party SATA3 interface solution were almost completely defeated by the native SATA3 results, especially in terms of starting applications speed, which was a full 20MB/s difference. (Starting Applications: Use IE to open the PCMark 7 specification 1.0 document and wait for a fully responsive hard disk operation record. 85% of them are random reads.) As a result, the score has dropped significantly. The use of a third-party SATA3 chip solution has greatly slowed down the random speed. , resulting in a sharp decline in its performance.
The main things to pay attention to are 4k alignment, AHCI, and SATA3 interface!
Question 7: Why is the computer still not running fast even after installing a solid-state drive? I also recently bought a Kingston 120GB SSD... My old computer has a SATA2 interface... The speed is much faster than yours... Read 380 MB/S... Write 130 MB/S. I use DDR2 memory...
I really can’t imagine that your system is so bad that it would measure such a low value... Do you want to take it to a repair shop and ask a professional to help you deal with it... After all Money is everything. It can solve all computer parts problems...
Question 8: Why add a solid state drive? SSD is far faster whether it is continuous reading and writing or 4k random/continuous reading and writing. Faster than traditional mechanical hard drives, it is the best choice for system disks and work disks. However, the cost per GB of SSD is much higher than that of HDD. For example:
The current market price of 128G SSD is generally 700 yuan, and the cost per GB is 5.468 yuan.
A 1.5TB HDD also costs about 700 yuan, with a cost of 2.14 yuan per GB.
However, the high speed and high shock resistance of SSD are unmatched by HDD.
Many computers are equipped with small-capacity SSD + large-capacity HDD to strike a balance between overall capacity, performance and price.
SSD is solid state drive.
Question 9: Why does a computer with a solid-state drive run so fast? Isn’t the speed of a computer determined by the CPU, memory and other important hardware? After all, the computer system is still installed on the hard disk. SSD (Solid State Drive) reads twice as fast as mechanical hard disk (SSD is 6GB/s, HDD is 3GB/s), and SDD is much smaller than HDD, so now all All ultrabooks are equipped with SDD. Generally, SDD is used as a system disk, which can achieve fast boot and 3s sleep startup; the CPU is used to calculate and convert data; the memory is used to store programs when the program is running, so many low-memory computers run There will be lags when running multiple programs; in addition, poor graphics cards will also cause computer lags and cannot read in high-resolution scenes, resulting in high CPU load. Each piece of hardware is related, so the computer's running speed is related to all hardware.
Question 10: Why are solid-state drives so fast? Is it because installing software on a solid state drive is faster or is it faster when installing the system? 5 points There are no mechanical parts in the solid state drive. Data is recorded by the main control chip and the memory chip. Which is faster electronically or mechanically?
This high speed is a property of the hard disk itself and has little to do with the system.