Let's just focus directly on:
advantage:
Practical: Now the performance bottlenecks of notebooks are basically hard drives, which will upgrade the solid state to enhance the experience very much, and the large-capacity solid state is more expensive. After buying this product, the mechanical hard disk of the original machine can be used as a data warehouse;
Cheap: In fact, for its work materials, it is not cheap
Sexuality can be used: Sexuality can be used, connected mechanical hard disk speed is stable and reliable
Disadvantages: Poor workmanship
Summary: If your notebook plans or has been upgraded to solid state, it is highly recommended to buy this type of product to keep the original mechanical hard disk reserved (of course, if you can find better quality workmanship products, this product is not recommended to buy ), you can lower The cost retains large storage space.
Navigation bar: If you don't like to watch, please jump directly to the chapter of interest
Chapter 1: The Purchase Process / (Cause)
Chapter II: Unpacking and Installation Process (When you get it, you can open it and install it. The following is the pseudo-opening)
Chapter 3: Mechanic Hard Drive Connection
Chapter IV: Detailed Explanation of Dismantling and Workmanship
Chapter 5: Evaluation Recommendations
Foreword:
Relatively want to be a little transparent, the previous experience of the use of the article is published anonymously, but now the mother asked the test to want to test, there must be non-anonymous original articles, so can not be pleasant anonymity.
Chapter 1: The Purchase Process/CauseAs recently seen in the Aunt Zhang, there are value friends mixed 51, there is a single X220, Haitao X220 article, poisoning want to experience ThinkPad, no money to buy new, so he also went to a second-hand foreign garbage to play . In order to enhance the experience, it is necessary to upgrade the solid state of the hard disk, so the solid state is started in Jingdong, but the solid state is very expensive. Finally, a cheap 200G is selected. After upgrading the solid state, it was found that the Nima 200G was not enough. The system used 70G, installed a few games and lost 40G... and thought of using an optical drive to install a mechanical hard disk as a data warehouse. So in the cat to find optical drive hard drive bay.
The following is the Tmall link: Basically, each model of the laptop drive of the various models can find the corresponding hard drive bay to install the hard drive, which means that this post content applies to almost all laptops with optical drive.
Taking into account that this product is simply to achieve brackets, transfer interface function, brand, model basically will not have much impact, so a random selection of 29.9 yuan (trading price of 29.9 yuan):
(The following link is another, and the one I bought has been removed)
When there is a box outside the express delivery, the packaging is still acceptable:
In order to save costs, and because the sales channels are in Tmall, no display is required, and corrugated cartons are used directly in the outer packaging of goods. Although this is a wise choice, it is still delicate.
Unpacking the family portrait: a bag of screws (this bag is not used), the bubble bag packaging bracket body
Hard disk tray body:
It is also good to look at the materials used for rough work. Both sides are covered by stainless steel. The corners are also OK. There is no hand burr.
Install the hard disk and the machine:
The following is the diagram installed in the notebook, the notebook is the ThinkPad T430, first remove the original drive, and then install the bracket into the notebook, is particularly simple:
According to the information searched by the Internet, the T430's optical drive interface is also SATA 3. The interface speed will not be a performance bottleneck.
Because of less knowledge of the hard disk, only a simple test in the speed test, only for reference, not enough comprehensive understanding also hope that the hard drive into the bracket for the Hitachi 5400 320G hard drive, the older one:
(The main hard disk is Jianxing T9 200, the following name is the name of this mechanical disk)
Copy from the solid state into a folder containing a total of 9.51GB of 5 movies. The stopwatch of the mobile phone is about 3 minutes and 21 seconds. 58
When the speed of copying is about 33-40M/S, it will reach 70-80M/S at the beginning of each file, generally stable at 35M/S.
In the same folder (9.5 films total for 5 movies), copying from the mechanical disk to the solid state, the mobile stopwatch is manually timed to about 2 minutes 2 seconds 87, and the speed is stable at about 80M/S (this may be the upper limit of the reading speed of this disk). :
Desktop hardware platform (disregard the company's machine configuration):
Desktop 7200 rpm 250G mechanical hard drive 
CrystalDiskMark test data:
Left: laptop hard disk test data in the bay, right: desktop hard disk test data:
Even though the read speed and random write data exceeded the 7200-rpm hard drive of the desktop computer, it was a little unexpected. This shows that the hard drive bay can play the loaded hard disk performance (when it was originally intended to install the solid state removed and loaded into the bay test, but After dismantling, it was found that there was no need to measure the PCB --- the inside of the PCB has no other electronic components other than the three chip resistors.
Chapter IV: Detailed Explanation of Dismantling and Workmanship The first impression from the unpacking of the package to the cradle feels good. After all, the price of 30 bucks, but also a bicycle? Looking at the positive and negative double-covered stainless steel shell, feel good, corner treatment is also OK, there is no flash, but after a closer look, you will find that the surface is often only an illusion.
After a simple comparison, it is found that there is a pit phenomenon in the bracket panel plastic:
Although it is known that such a hard disk tray is only a transfer function, it is very curious to want to know the internal structure of the tray and the status of electronic components, and is also very curious about the price of such cabbage. Can businesses earn money? Then he decided to dismantle the solution and found that after the dismantling, he found that the bracket's work was really flattering. . .
Open the cover and find that the LED light is plugged in this seam, and the installation position of the led light is not designed.
There is a problem with the dimensions of the bracket panel and the bracket body design, there are traces of trimming on the fixed foot, and the corresponding wire duct is not designed for the wire.
The panel and the bracket body are actually fixed by two plastics. Is it still hot? This process should not apply to mass production? ? ?
After removing the back cover, you can see the back of the bracket is also very simple, the back of the PCB on the right is also very simple 
Continue to remove the PCB. After removing the PCB, drop a small piece of tin with a diameter of about 1mm. If this tin is dropped on the pins of the SATA interface, there may be a risk of a short circuit. It can be seen that the manufacturer's SMT department has a good quality inspection. careless
The front of the PCB board is also very simple, except for the two SATA interface cards, there are only 3 resistors, and the largest resistor on the right is just a 0 ohm resistor that acts as a connection.
Obviously, it can be seen that the SATA interface plug-in has left a lot of tin prints, the plastic parts of the interface plug also have scalding, there are many small solder balls on the PCB board, and the interface pins have more serious air-welding and imaginary soldering. When the manufacturer was producing, the process of the SMT department was very poor, and the maintenance personnel's skill in repairing the finished solder was also poor.
The LED light board is also covered with tin beads
From the perspective of price alone, 29.99 yuan is really cheap, it may be the cheapest modular part of the entire notebook, and it also caters to the people's pursuit of a high "cost-effective" mentality. However, from the perspective of workmanship and design, this product is very bad:
The connection between the panel and the bracket is overheated. This original process may affect the stability of the product. The dimensions of the panel and the bracket may have a problem. (However, they must be assembled by cutting the legs of the panel). There is no LED cable inside the bracket. The process of the SMT department of the tank and the manufacturer is very backward, the soldering skills of the employees of the manufacturer are also relatively lacking, and the QC inspection labels are not found in the internal and external components of the product. There may be a possibility that the product will not be shipped when it is not tested.
Looking back at the components of the hard disk tray, under the premise of mass purchase, it is estimated that the cost of the entire bracket's components will not exceed RMB 5, plus the labor cost and the flat design cost estimate will be RMB 3/piece. With packaging materials and other costs, the cost of each bracket can be controlled within 10 yuan, and then count the postage, so at the price of 29.9 yuan, the gross profit of each piece can reach 10-15 yuan.
Judging from the internal work and structural design of this hard drive bay, the high sales volume of this bracket product is likely to come from the hands of a workshop-style small factory, and it is likely that the manufacturers do not even have standard production processes and testing standards. Under certain circumstances, it may pose a potential danger to the user's laptop. It is expected that merchants can launch higher-order products, instead of blindly pursuing low prices, they can consider producing higher-quality bracket products and increase sales prices slightly to protect the safety of users' computers.
The conclusion is at the very top, this concludes.
Thank you for being able to see this. The writing is rough and the mistakes are unavoidable. You also forgot to give us your instructions. thank!
You are worthy friends, and then you will.
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