The first time I purchased the U disk, when I wrote the graduation thesis in 2003, the Buffalo 32M U disk, 1.44M floppy disk than the dozens of K read and write speeds, it is convenient too much, and then with the U disk .
For more than a decade, the main purpose of U disk is to facilitate the installation of system disk and copy the data to others for use, and used seven or eight U disk with capacities ranging from 4 to 32G. Most of the U-disks are event awards or credit card gifts, among which there is also a dumb thing like a 350-megabyte U disk.
Now let's introduce the USB flash drive on hand, read the U disk master control information, run ATTO and CDM tests, and add personal subjective feelings in recent years.
1 Kingston DataTravler 2000 32G Encryption U diskRecently, because the unit needs to purchase a public security U disk, store key server passwords, backup server configuration files, and other information, it has contacted the Kingston DataTravler 2000 keyboard encryption U disk.
Such a high-priced encrypted U disk, if not used to store Bitcoin wallets, Zhang Aunt valued friends generally do not have such a high degree of confidentiality for personal use. I also chose this U disk because of the encryption needs of the unit's server password.
What is special about it is that it has an alphanumeric keyboard that locks the flash drive with a combination of words or numbers, providing easy-to-use PIN protection. After the flash drive is unplugged from the USB interface, the auto-lock function will be activated. After ten attempts to enter the PIN code, the user will destroy the encrypted file data. Does this sound cool?
It uses full-disk AES 256-bit hardware data encryption in XTS mode. Encryption is done on the flash disk instead of the host, leaving no PIN marks on the system for reliable security.
Why is it safer to say that Ah Cai had done Trojan program development in the early years, knowing that the host-side keyboard enters a password, and there are multiple possibilities to steal the password.
Ah Cai knows at least three or more methods - the first is a contact-type intrusion, insert USB keylogger at the keyboard USB interface. Remote intrusion can use low-level keyboard hook Rootkit Trojans and virtual device-driven camouflage keyboard drivers, disguised themselves as Windows system keyboard drivers, capture the real key records and then forward the password to obtain the password.
In order to achieve such a function, it also built a 3.7V lithium battery. In this way, after the USB interface is unplugged, data will be automatically destroyed when the powerless state continues to switch the U disk lock and perform brute-force cracking. U disk has aluminum alloy shell, and there is a rubber waterproof seal design, but the official information does not describe the IP67 and other waterproof properties, so Ah Cai is not sure whether this U disk is not to support waterproof design.
Actual operation Enter the password to unlock the video. The green light that is unlocked after the correct input will be on. At this time, the Windows system sound that is inserted into the USB flash drive will be heard.
Check U disk is used in Group PS2251-13 master control, flash memory particle information is unknown.
The hardware-encrypted USB flash drive with a retail price close to 1,000 yuan has a good read/write speed. The ATTO test continuously reads 160 M/s and writes at 90 M/s.
CDM's write speed performance is not so good, only 47M/s
Mainly to do WS2012 R2 server system installation disk (of course, only emergency situations, of course, most of the time through the iLO 4 remote loading ISO file installation system is more convenient.) And all server password backup, including iLO, Windows administrator, and The background password of the information system.
This Rais key U disk has a belief in halo, once won the red dot design award. Jingdong iamakey version has been removed, can only come to a model of the same encrypted version of the link.
What I have is the LaiCe iamakey 8G version without encryption five years ago. To be honest, it has a terrible literacy performance. It is a product that sells industrial designs. Now, it is a domestic copycat. USB 2.0 interface, 5M write speed, standard slag ah. With such performance, it will sell 99 yuan in 12 years, mainly selling designs.
You asked me why I bought it? In 2012 when young and ignorant greedy and sleek in style, oh ......I didn't know that the performance was so unbearable, but it was a simple and durable metal case. I threw it in my pants pocket and was washed in the washing machine. It was still safe.
LaiCe iamakey U disk uses the SMI Hui Rong master, TLC particles.
This U disk write performance can only be described as poor, copy 1G small files have to wait for an hour, basically no use value, in addition to the system U disk no other significance.
The Ultra-Fit is the first USB 3.0 U disk I have, so it's still very emotional. This is also my favorite U disk, because it is very short, not because of the hands and feet touch the USB port to bend the U disk, no kidding, following the long MSI customized version of U disk I have almost broken the USB port . Jingdong bought 59 yuan in 14 years and now it has fallen to 35 yuan.
Its first read speed exceeded the USB 3.0 limit of 30M, let me see the potential of USB 3.0 storage devices.
Both write and read performance are no longer at the bottom of the pad, and they are 5 times faster than slag writes on TLC particles.
This U disk let me know that the original Kingston has U disk tradition of the year, but the dragon, snakes, horses, sheep in the past four years of the annual commemorative U disk design can only be described by good Ray, the material is also relatively red Rubber molds. Kingston of the Year of the Monkey released a USB 3.1 USB flash drive that looks relatively normal in aesthetics.
The commemorative U disk of the Year of the Goat has already gone offline. If value-friends think that the shape is still pretty, or collect a metal monkey version of it. Commemorative Edition 8G generally buy 59 yuan
This U disk is still USB 2.0+TLC garbage U disk specification, can only say 39 to buy a toy of the year only. Ah Choi's behavior of collecting embarrassment is similar to eating McDonald's packages to collect limited-edition toys.
Very mediocre U disk, starting price in 2012 should be 29 yuan.
No master and NAND flash memory particles were identified, but from the write speed, it was slightly better than the worst TLC.
Compared with the worst write performance of the TLC U disk in the worst line, when writing a large amount of files, it is also possible to go for a smoker to eat a meal.
The next two U-discs are premium grades. The first one is the 32G USB 3.0 U disk provided by the MSI graphics card, but this U disk Acacia needs Tucao, this is the only U disk that does not support USB boot. And can not start it on the power, plug this U disk must be turned on the black screen can not boot from the hard disk or SSD.
This makes the U disk use value greatly reduced, plus the U disk length is too long, but it is a plastic material, often encountered almost broken USB port, basically into the cold room, not easy to use.
Write only 5M, so it must be Micron TLC particles. After all, it's a giveaway. Writing speed is very moving.
In addition to the cool bean 16G, other U disk below $100 is a penny-a-delivery product, especially U-disks less than $30, basically all submitted for papers (in fact, graduated for many years, I do not know now university Whether the papers were submitted to U disk or CD-ROM, if it was hard to tell a difference, it would be the difference between TLC written by 5M, TLC written by 10M, and TLC written by 25M.
Of course, Kingston's DataTravler 2000 encryption U disk has a specific user group for this special security U disk. Although the read and write performance is not bad, it is not reflected in its read/write speed, but its price. Generally speaking, it is not an individual user's consideration of the product orientation of consumption.
But to sum up, U disk can actually be divided from the upper and lower third class from several performance indicators:
Upper U disk: Continuous read and write speed (minimum of two, typically write speed) > 90M/s ie USB 2.0 interface limit speed (30M/s) more than 3 times; using MLC flash memory particles; 4K random read Write speed> 4M/s Special mention, U disk if you want to live long (usually U disk is accidentally broken, washing machine water is bad, or lost), short-body design is better, even if the performance of long U disk Sandi CZ80 I heard that there have been no fewer than five people who accidentally broke the USB port when they encountered it.
Medium U disk: continuous read and write speed (minimum of two, typically write speed) > 30~60M/s ie USB 2.0 interface limit speed (30M/s) 1~2 times; use of TLC flash memory particles; 4K random read/write speed > 1~2M/s Medium U disk 39 yuan/32G can be used for casual use,
Lower U disk: Continuous read and write speed (minimum of two, typically write speed) < 30M/s ie USB 2.0 interface limit speed (30M/s) 1 time or less; using TLC flash memory particles; 4K random read Write speed < 1M/s U disk is not worth the money to buy, gifts are laughable.