portable ssd We Tested 30 Portable Hard Drives with Embarrassing Resultsadmin
We Tested 30 Portable Hard Drives with Embarrassing Results【portable ssd】
hard drivesSSD OEM portable ssd This is about to reach the 618 shopping festivalportable ssd+ 8618750919058, there are small partners who want to buy 3C products can be grasped. I recently worked on portable hard disks knowledge point 1:
SD is directly translated into an SSD, which is a storage device that reads and writes data through electronic signals.
HDD directly translates to hard disk drives (what we call mechanical hard disks), which is a mechanical storage device that rotates through platters and reads and writes by a magnetic head.
we selected 7 SSDs and 23 HDDs were tested on a total of 30 mobile hard drives, due to the difference in the structure of the two hard disks, the common comparison will be very unfair, so we made a separate comparison of the same type of hard disks.
of which 7 SSD mobile hard disks are priced at 599-1288 yuan, and the capacity is between 240-256GB, except for Sony’s USB3.1 standard, other products are USB 3.0 standards. We tested from three dimensions: sequential read and write (40%), random read and write (40%), and usable capacity ratio (20%).portable ssd
23 HDD mobile hard disks between 359-799 yuan, the capacity is 1TB, all using USB 3.0 interface, except for the Lanshuo brand is 3.5 inches, the rest are 2.5 inches. Since the specifications are the same, the actual usable capacity is 931GB, so we only measured two dimensions: sequential read and write (50%) and random read and write (50%).
knowledge point 2:
3.0 and USB
3.1 is actually a USB specification initiated by Intel and other companies, we can simply understand that this specification will give us the highest speed of reading and writing to limit, and the USB 3.1 limit value is much higher than USB 3.0, and we test the device’s read and write speed is far from reaching this value, so everyone understands it.
SSD comprehensive TOP 1
Samsung T3 250GB 799 yuan
recommended reason: As one of the few 1.8-inch SSD mobile hard disks on the market, Samsung T3 series products are not only small in size, but also have a maximum 2TB version to choose from, which can meet the needs of different users. Whether it is sequential reads and writes, random reads and writes, or the usable capacity ratio level is relatively prominent.
SSD minefield products should not be touched
Patriot SD01S 699 yuan
do not touch the reason: although the price of the SSD mobile hard disk in this test is not much different, the difference between the performance in theory will not be too obvious, but this patriot is an accident, sequential read and write and random read and write speeds are generally low, but the price is not low, although this mobile hard disk also has advantages, that is, the usable capacity ratio of 99%.
HDD comprehensive TOP1
Lacie Porsche Design 569 yuan
Why: You may not have seen this brand, but LaCie is a big brand from France and is recognized as the leading manufacturer of storage devices in Europe. Of the 23 products we tested, the comprehensive read and write speed is the fastest, and the value will not disappoint you. Because the difference between HDD mobile hard disks is not very large, so everyone can choose according to their own preferences.
knowledge point 3:
sequential read: the speed at which large files are opened in the portable hard disk / the speed at which large files are copied from the portable hard disk to the computer.
sequential write: the speed at which large files are copied from a computer to a portable hard disk.
random read: the speed at which small files are randomly opened in the portable hard disk / the speed at which small files are randomly copied from the portable hard disk to the computer.
random write: the speed at which small files are randomly copied from computer folders to the removable hard disk.
you can see from the data that the overall read and write speed of these SSD mobile hard disks is still good, except for patriots.
as can be seen from the data, these HDD mobile hard disks will vary, but they are not particularly obvious.
1、Sequential read and write
we will uniformly change the hard disk to exFat format, use disk Speed Test software for sequential read and write testing, select the 5G file size option for testing, and take the average after two tests.
2, random read and write
random read and write test using QuickBench software, the test recorded Standard Averages (random read and write average) items, the final result is also the test twice to take the average.
the usable capacity ratio of SSD mobile hard disks
in fact, in this dimension, the gap between 7 SSD mobile hard disks is not large, everyone chooses according to their own needs, if you really care about the use of space, you may wish to change a larger capacity product.
but I still want to show you the data, after all, I have worked hard for so long.
this test is over, but I have something to say before I finish.
Q: Is the life of an SSD hard drive really as short as the rumors say?
A: No, we can safely choose boldly. Although the number of erases and writes of the three flash memory particles used on common SSD hard disks is not much, this number does not directly indicate the life, and the life of the SSD hard disk needs to be calculated.
formula: SSD life = SSD capacity * number of erasures / write magnification factor factor, household SSD write magnification factor factor factor is “1”.
if a 128GB MLC SSD has 3000 erases, then the life calculation result according to the formula is 384TB, simply put, if your average internet speed is 4MB/s, you download it continuously for 24 hours, and it will take more than 3 years to complete. I believe that no one will use a portable hard disk in this way, so everyone does not have to worry about life.
Q: which is better for SSD and HDD moving hard disks?
A: In theory, SSDs are definitely better in terms of performance, but it is unfair to compare them because of the differences in the construction of the two hard disks. All I can say is choose an SSD if you care about performance and have a good budget, and hdD if you don’t have enough budget and need mass storage.
SSD (left)/HDD (right).
1, our evaluation results are not interfered with by the brand side, only rely on the detection data to speak;
2, the evaluation recommendation is not suitable for everyone, please buy according to your own situation;
3, if the content of the article is inappropriate, please criticize and correct, we will be humble to improve