A few days ago friends asked, $ 70 second-hand Western Digital 500G black disk, okay? First of all the price changes, 2019 is a new solid-state hard drives, memory, flash memory and other products plummeted year, many second-hand goods such as mechanical hard drives also plummeted, mostly fell below half of last year. A few days ago about the investigation, and now the second-hand desktop 500G hard drive, Taobao more than the market price at 45-60 yuan, 120 yuan a year earlier and down.

Most people dismissive of second-hand computer hardware life. However, once an understanding of the hardware, it will open a new field. Because these are mostly used hardware from the original machine to the low-cost acquisition of removed, together with the new hardware and there is no difference, just a few more dust. For example, an original price of 2000 yuan -4000 yuan computer, a few years sold to recycling, the price is only $ 50-100, cheaper bad computer (which can be split out a lot of good hardware). The computer sold to recycling, the majority of the hardware and not so familiar, if not sold, can only take a place at home, so books like 1 yuan/kg to sell the computer.

Used hardware price is about 10?50?f new hardware, almost equal to give away. The need for a test, or a play, or save money, can come in great handy, and the same basic quality and new products. Because a qualified electronic products, most of them can be used for more than 15 years, in addition to the computer motherboard relatively short life.

Understand the hardware of friends, all know that the hard drive is very afraid of the earthquake of products. Used hard can it?

The answer is yes, use, and easy to use. Secondary hard drive and a new hard disk delivery channels, packaging is exactly the same. Couple of years ago, I bought in Jingdong 2T new Seagate hard drive, simple packaging to no shock package, only the hard drive tray, plus a courier bags, but fortunately there are 2-year warranty. Later, after Saowan hard disk, no bad sectors, it is still good to use.

Used hard disk shock package, generally better than when I bought in Jingdong 2T new Seagate hard drive is much stronger, so do not worry about it. If there are bad sectors, most sellers have presented shipping insurance, return directly.

Back to the topic, to buy a mechanical hard disk Notes

Whether it is new or second-hand hard drives, detection methods are the same. Actually there is no overall scanning bad sectors, if there are bad sectors, and immediately returned to the seller, can not have a bad track, because the bad sectors will spread. Some software can be shielded, or repair bad sectors, such as DiskGenius software. However, after some time there will be bad sectors in other places.

Hard disk has bad sectors, tantamount to waste, because the data is valuable.

If the hard drive is not bad sectors, some time before scanning or no bad sectors, then the mechanical hard drive life in general will be very long, up to ten or more years, decades.

Here it is recommended only two bad sectors detection software must be used:

DiskGenius 4.5.0

HDTunePro 5.5

Please note the version number to be the same way. Because of the time, simply a small amount of shots, very simple to use. Please scan in Win7 PE.

First scan it again with DiskGenius 4.5.0, if no bad sectors, will eventually prompt no bad sectors. Then HDTunePro 5.5 scan it again, if there is no bad sectors, all the boxes in green.

4.5.0 DiskGenius use, in the hard disk, the right mouse button to scan "bad sectors and repair detection (Y) start detection", the default timeout 3000 milliseconds. As shown below:

HDTunePro 5.5 to use, click on the upper left corner, select the hard disk. Then, select the top of the "Error Scan", click "Start", as shown below:

$ 70 second-hand Western Digital 500G black disk okay?

Positioning black disk Western Digital is the highest quality enterprise drives, but I personally have a black shadow on Western Digital disk. At the end of 2014 I spent 300 yuan to buy a brand-new 1.5T black disk Western Digital to buy when there is no bad sectors. But after some days, there are a few bad sectors scan. I was just hard to use a 50cm, 20cm long SATA power extension cable, in order to facilitate the switch hard disk. Only to find that an extension cord, I spent a long time with a lot of hard disk will be knocking (ie boot hard disk will hear a motor on it, pause the sound), the system does not recognize hard drive, only to find that the problem is in this species extension cords insufficient supply.

At the same time, however, this extension cord, there are many hard disk can be used normally. It was difficult to find a reason for my extension cord caused.

So far there are no conditions can determine the piece of hard disk failure caused the SATA power extension cable, or piece of 1.5T WD black disk itself is defective. So, I have a black shadow on Western Digital disk.

Coincidentally, in terms of quality, I am very reliable Seagate hard drives, there is a good all-500G Seagate hard drive, bad sectors, use the same extension cord. Then I put the extension cord reinforcement, then there is no knocking phenomenon, as shown below. Core hard line 4, the yellow line 12V +, + 5V for the red, the black line is negative. Because the two black lines are shared, there is no reinforcement, only to 12V +, 5V + reinforcement.

Below, from the left, the original line 1 and 4, the intermediate 2 and 3 are like after reinforcement.

$ 70 to buy Western Digital 500G black disk, it is better to buy a $ 50 Seagate 500G hard disk, cheap, quality is more assured. Because Seagate and Western Digital hard drive, I checked a lot of users post, Seagate lower failure rate. And the same age products Seagate reads a lot faster than Western Digital.