"The original mobile hard disk comes from professional hard disk manufacturers. Netizens believe in their strength and professionalism and choose to buy the original mobile hard disk. However, the past is contrary to our wishes. In our real life, we find that there are many unreasonable after-sales services for the original mobile hard disk.
Why do you want data without after-sales original mobile hard disk
Netizen xiaok bought Western Digital 1TB mobile hard disk a year ago, with the model of WD elements portable Se series 2.5-inch 1TB. Xiaok responded that there was no response when his mobile hard disk was connected to the computer recently. Xiaok took the mobile hard disk to the merchant for after-sales. The merchant said that the mobile hard disk after-sales needs to wait for one month. The hard disk returned from after-sales is a good product, not the original mobile hard disk.
There are very important files in xiaok's mobile hard disk. I hope to repair the disk body of the original mobile hard disk and retain the data. The merchant suggested that xiaok spend money to open the data recovery company to extract the data. His colleague reminded xiaok that if xiaok opens the mobile hard disk privately, western data will no longer undertake any subsequent after-sales service.
In desperation, xiaok asked for help in the forum. With xiaok's consent, we opened the West digital 1TB mobile hard disk and saw its true face. We took out the main body of the mobile hard disk and found that it could not be read using the SATA interface at all. Finally, xiaok spent 1800 yuan to extract data from the professional data recovery company, including more than 900 yuan spent on purchasing the hard disk before and after, with a total loss of 2700 yuan.
After the failure of the original mobile hard disk purchased by xiaok, he faced with difficult choices of data preservation and after-sales. Finally, he chose to preserve valuable data, which is called "losing his wife and breaking soldiers". What is the reason why the Western Digital 1TB mobile hard disk can not work? Now let's take a look at the disassembly drawing of this mobile hard disk.
The original mobile hard disk comes from four major hard disk manufacturers, namely western digital, Hitachi, Toshiba and Seagate. The majority of consumers have no doubt about the authority and professionalism of these hard disk manufacturers.
In addition, high cost performance is a great advantage of the original mobile hard disk, which is especially popular with consumers. What is the price advantage of the original mobile hard disk? They can be 20-30 yuan more expensive than simple similar notebook hard drives, and cheaper than assembling mobile hard drives.
However, when we disassembled the Western 1TB mobile hard disk used by netizen xiaok, we understood why the hard disk manufacturers could make the cost so low. The reason can be explained in one word: Province!
Western elements Full disassembly of 1TB mobile hard disk
Disk body of Western elements 1TB mobile hard disk
USB interface of Western Digital elements 1TB mobile hard disk
We carefully observed the appearance of the mobile hard disk without obvious bumps, and its USB interface was intact without signs of looseness. When we powered it on, we found that it was running, and it worked on multiple computers. Disk management found the hard disk. We preliminarily judged that the internal magnetic head or PCB of the mobile hard disk was faulty.
Disassembly of Toshiba original mobile hard disk
USB3.0 modular interface equipped with Seagate high-end ruipin mobile hard disk
The Toshiba original mobile hard disk mentioned above has a conscience compared with the Western Digital original mobile hard disk, and at least has an independent USB bridging module. The original Seagate ruipin mobile hard disk has an independent USB3.0 modular interface. It is obviously a high-end product, and the price is a bit higher than that of Toshiba and Western Digital.
Summary: there is no pie in the sky. Xiaok was greedy to buy cheap Western 1TB mobile hard disk, and paid a heavy price for the subsequent mobile hard disk failure.
Individual irresponsible hard disk manufacturers use consumers' trust in the original products to reduce the cost to the extreme. In fact, the hard disk manufacturers can achieve the degree of Western digital mobile hard disk without shell and directly add USB cable to the disk body.
And the warranty clause of the original mobile hard disk clearly stipulates that consumers cannot disassemble it without permission, otherwise they will lose the warranty. This provision is like a double-sided blade. While protecting the disk from being transferred and counterfeited, it also deprives consumers of their right to know. Ordinary consumers cannot know the internal structure of the original mobile hard disk.
Because xiaok netizens need to sell the mobile hard disk, we can't disassemble the 2.5-inch 1TB disk of Western elements portable Se series. Here we use a mainstream Western 500GB mobile hard disk for disassembly experiment to find out.
My passport essential se 500GB USB3.0 original mobile hard disk
Traditional notebook hard disk has SATA interface without USB bridge chip and corresponding circuit design
Western Digital 500GB mobile hard disk cancels SATA hard disk and power interface, and adds USB3.0 bridge chip and supporting circuit part on its PCB.
Brand hard disk box manufacturers are pioneers of mobile storage. Before the emergence of original mobile hard disk, the assembly of mobile hard disk has been in a dominant position for a long time. At present, only a few hard disk box manufacturers such as SSK Biao Wang and storage bus are left.
The core part of the hard disk box is the PCB board. The PCB board circuit design of these early brands is also relatively complete. We compare the PCB board of a storage bus T260 hard disk box with the PCB board of a Western Digital 500GB mobile hard disk.
Circuit protection design of USB bridge chip
Comparison of circuit protection design of USB interface
By comparing the above two figures, we can clearly feel that the workmanship of Western digital mobile hard disk has shrunk. Its high pulse current withstand voltage performance is obviously inferior to that of brand hard disk box. Its qualified circuit protection design can meet the needs of normal work, but it can not face extreme dangers.
The original hard disks of Seagate, Toshiba and Hitachi are designed with independent USB bridge chip modules. In order to reduce the volume of mobile hard disks, they are highly integrated. Their circuit protection design has shrunk to varying degrees, but these manufacturers still keep the most important functions for the sake of users: when the original mobile hard disks are faced with extreme high pulse current, The independent USB bridge chip module gives priority to protecting the disk body.
Summary: the author suggests that users should not connect the low-end and cheap original mobile hard disk to the computer for a long time every day if it is not necessary. The after-sales rate of some brands of mobile hard disk is often low in the first year and soars in the second and third years. The reason lies in the aging of electrical components, the reduction of withstand voltage value and the slow decline of the protective effect of the circuit.
The after-sales overlord terms of hard disk manufacturers do not guarantee the data security of users. They carry out after-sales service for hard disks according to the three-year warranty. Generally, they directly replace new products (the first year of the after-sales period) and good products (the second two years of the after-sales period).
If the label of your original mobile hard disk is obviously scratched, you may face the refusal of the after-sales department
In fact, the after-sales process of netizen xiaok was not smooth. Because his Western 1TB mobile hard disk label was slightly scratched, the merchant asked to increase the price by 100 yuan for warranty. Xiaok hesitated in the merchant's store for nearly an hour. During this period, the merchant repeatedly urged xiaok to make a decision between "after-sales renewal and data preservation". Finally, xiaok chose the latter.
Is there any way to avoid these risks? The original mobile hard disk is not allowed to be disassembled, but the assembly of the mobile hard disk is OK. Moreover, the brand hard disk box has experienced years of training, and they are still quite reliable. How about the performance comparison between the assembled mobile hard disk and the original mobile hard disk?
Consumers are most worried about the quality of assembled mobile hard disk. Therefore, we suggest to select SSK Biao Wang or storage bus mobile hard disk boxes of first-line big brands, which have one-year warranty and good reputation, exquisite workmanship and fashionable appearance. Secondly, notebook hard drives generally have a three-year warranty.
Consumers are also worried about another important problem, that is, how difficult it is to assemble and install mobile hard disks. Now the installation of brand hard disk box is quite simple. You only need to screw a few screws.
We choose a Biao King SSK with a price of 68 yuan in Jingdong Mall Black Hawk II HE-T300 Take the 2.5-inch hard disk case as an example. At the same time, we purchased a Hitachi 2.5-inch dual disk 1TB notebook hard disk with a price of 590 yuan at Zhongguancun store, and assembled the two DIY into a mobile hard disk.
Biao Wang SSK he-t300 hard disk box, accessories, notebook hard disk
DIY mobile hard disk assembly process
We connect the hard disk interface of the hard disk with the SATA slot on the PCB. Then we fix the hard disk and PCB board with screws.
Fixing process of a / b shell of mobile hard disk box
Then we install the A / b two-sided shells of the hard disk box. The hard disk shell adopts the combination of buckle and screw fixation. After we find the position of the buckle and fix it, we only need to screw four screws to form a completed mobile hard disk.
Appearance comparison of assembled mobile hard disk
The interfaces for assembling the mobile hard disk are obviously richer than those of the original mobile hard disk
We compare the appearance of the original mobile hard disk, Apple iPhone 4S mobile phone, bus card and assembled mobile hard disk. The appearance of the assembled mobile hard disk is not the same as that of the original mobile hard disk, and the volume is slightly larger. However, the scalability and interface of the assembled mobile hard disk are by no means comparable to the original mobile hard disk.
The performance of mobile hard disk is the focus of consumers' attention. Both the mobile hard disk we assembled this time and the original mobile hard disk of Western Digital adopt USB3.0 interface and dual disk 1TB / 5400 RPM notebook hard disk. Who has the better performance?
● bottom layer test: HD tune Pro v4.60
HD tune is a hard disk performance diagnostic test tool. It can detect the transmission rate of hard disk, burst data transmission rate, data access time and CPU Usage rate, health status, temperature, scanning disk surface, etc. In addition, the firmware version, serial number, capacity, cache size and current transfer mode of the hard disk can be detected in detail.
Note: SSK he-t300 is the model of hard disk box, and the disk body is Hitachi 5k1000-1000 (1TB) hard disk.
HD tune reading speed of assembled mobile hard disk
HD tune reading speed of Western Digital 1TB mobile hard disk
From the reading speed of HD tune, the average reading and writing speed of the assembled mobile hard disk is 86.7mb/s, the maximum reading speed is 110.1mb/s, and the minimum reading speed is 51MB / s.
The average reading and writing speed of Western Digital 1TB mobile hard disk is 92MB / s, the maximum reading speed is 118.2mb/s, and the minimum reading speed is 55mb / s.
● CrystalDiskMark
Crystal diskmark is a simple and easy-to-use hard disk performance test software, but the test items are very comprehensive, covering continuous read-write, 512k and 4KB Packet Random read-write performance, and 4K random performance when the queue depth is 32. The queue depth describes the maximum IO value that the hard disk can activate at the same time. The greater the queue depth, the higher the actual performance（ Crystal diskmark (CDM)
CDM read and write speed of assembled mobile hard disk
CDM read and write speed of Western Digital 1TB mobile hard disk
In terms of CDM read-write performance, the maximum read speed of the assembled mobile hard disk is 108.5mb/s and the maximum write speed is 107.7mb/s.
The average reading and writing speed of Western Digital 1TB mobile hard disk is 92MB / s, the maximum reading speed is 112.9mb/s, and the minimum reading speed is 112.7mb/s.
● application performance test: FastCopy
FastCopy is a compact file / directory copy tool with powerful functions and superior performance. It can fully tap the capabilities of file system and hard disk drive, and supports counting and timing. Here, two directories are used for testing: the first is the "drivers" directory containing 12638 files with a total capacity of 5380mb; The second is the "hdvideos" directory containing two files with a total capacity of 3620.9mb, which examines the ability of the file mobile hard disk to cope with a large number of small files and large file copies.
Actual copy speed of assembled mobile hard disk
Actual copy speed of Western Digital 1TB mobile hard disk
Through the FastCopy test, we can see that the actual transmission speed of small files in the copy batch of the assembled mobile hard disk is 45.84mb/s; The transfer speed of copying a single large file is 96.88mb/s.
The actual transmission speed of small files in batch copy of Western Digital 1TB mobile hard disk is 51.59mb/s; The transfer speed of copying a single large file is 101.71mb/s.
Test results
Test subproject
Assembling mobile hard disk
Original mobile hard disk
disparity
CrystalDiskMark read / write test (MB / sec)
read
one hundred and eight point five
one hundred and twelve point nine
-4.05%
write in
one hundred and seven point seven
one hundred and twelve point seven
-4.64%
HD tune read / write test (unit: MB / s)
Average read speed
eighty-six point seven
ninety-two
-6.11%
Maximum read speed
one hundred and ten point one
one hundred and eighteen point two
-7.35%
Minimum read speed
fifty-one
fifty-five
-7.84%
FastCopy actual copy test (unit: MB / s)
Single file copy speed
ninety-six point eight eight
one hundred and one point seven one
-4.98%
Fragmented file copy speed
forty-five point eight four
fifty-one point five nine
-12.54%
total
-6.78%
Generally speaking, the speed difference between the two mobile hard disks that also use dual disk 1TB notebook hard disk is small, and the performance of the assembled mobile hard disk is slightly inferior to that of the Western 1TB mobile hard disk. Considering the powerful expansion performance of the assembled mobile hard disk, we can replace the 7200 RPM notebook hard disk with stronger performance, and even directly replace the solid-state hard disk. The performance of the original mobile hard disk can only catch up with it.
No matter how fast the notebook hard disk is, it will have a speed of more than 100 megabytes. We use the notebook hard disk with the best performance to assemble the mobile hard disk. Comparing the performance with the original mobile hard disk is also 50 steps to laugh at 100 steps. At present, the price of solid-state disk is rapidly declining, and the brand high-capacity SSD mobile hard disk is often thousands of yuan. This creates an opportunity for us to assemble SSD mobile hard disk with hard disk box.
Method 1: manufacturing of mobile hard disk box
Cost: Samsung 830 series 256gb SSD (1680 yuan), storage bus T260 (170 yuan)
Branded hard disk cartridges and SSDs
Comparison between the assembled SSD mobile hard disk and the original mobile hard disk
Method 2: manufacturing of Seagate ruipin USB converter head
Seagate USB3.0 modular interface can be directly connected to SSD
The simplest SSD mobile hard disk was born
Performance effect of SSD assembling mobile hard disk:
HD tune read and write speed of Seagate USB3.0 modular interface test
CDM read and write speed of Seagate USB3.0 modular interface test
Of course, the mobile hard disk assembled by SSD easily kills the original mobile hard disk. Unfortunately, both brand hard disk box manufacturers and hard disk manufacturers
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