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or even 4 K.Read Speed Read this file now. However, you must first clear the memory cache to ensure that the file is indeed read from the drive disk. Run the following command to clear the memory cache $ Sudo sh-c "sync echo 3>/proc/sys/vm/drop_caches" Read this file now $ Dd if =./largefile of =/dev/null bs = 4 k 165118 + 0 records in 165118 + 0 records out 676323328 bytes (676 MB) copied, 3.0114 s, 225 MB/s On the Arch Linux wiki page, there is a full page of information about vario
Flash genius is a flash parameter query tool that can quickly identify flash chip manufacturers, product categories, operating voltage, storage capacity, chip versions, feature types, and so on.The software is green, small, and easy to operate. It is a good assistant to electronic enthusiasts and digital maintenance personnel. Update history: V3.4 supports query of New spectek flash Models V3.0 introduces an English interface, which is suitable for non-Chinese users. It adds simple queries
s3c2440a and dm9000 is shown in Figure 3.11. The dm9000 is accessed and controlled through the data cable [15. 0], address bus ADDR [2], and h1102 chips. Figure 4.4 Ethernet CircuitInterface Circuit Design of 1.5 SD/mmccard In the navigation system, a large amount of spatial and geographic information needs to be stored. Both the CF card and SD card are suitable storage devices. In this system, SD card is selected as the storage device. The internal structure of the SD card is 3.9, and its si
interface with a speed of 6.0gb/s. This interface supports Gundam 600MB/S bandwidth throughput. Backwards compatible with SATA 3 GB/s interfaces. 2, determine the parameters of the hard driveI bought a 2.5-inch 7mm thickness of SanDisk, note that there are many types of thickness;3. Determine the model of the optical drive bayRemember that the MacBook Pro's optical drive bays and other optical drive bays are different, so make sure you buy the o
How to select a memory card The SD card (secure Digital Memory card) is a new generation memory device based on the semiconductor flash memory, which is widely used in portable devices, such as digital camera, personal digital assistant (PDA) and multimedia player. SD Card by Japan Panasonic, Toshiba and the United States SanDisk Company in August 1999 jointly developed. The size is like a stamp SD memory card, weighs only 2 grams, but has the high m
The small new Air12 standard USB2.0 interface and a standard USB3.0 interface, so what is his measured data? Let's take a test. Equipment: Small New Air12 one, SanDisk USB3.0 u disk One, the King USB3.0 mobile hard drive A Transfer file: A Win10 mirrored file for a single file of 4G degrees Solution: 1, USB3.0 mobile hard disk using Air12 USB2.0 interface to transfer large files, measured speed stability in 37mb/se
1. Price is the determining factor. These people generally to students mainly in school, buy U disk is mainly to store some learning materials and personal information, due to economic problems, cost-effective to them to tell is the most important, as for speed and stability, they do not care so much. Recommended Brand: Newman, Yi Jie, Tsinghua Violet (fake too much, the purchase should be prudent). Do not recommend Lenovo, NETAC, the price is not easy to use. 2. Stability is the determining fa
directly to the defragmentation of the SSD, and the normal switch does not pull the power off. At present, there are tests show that SSDs may be in the case of accidental power outages, the deadlock, failure. Also, pay attention to the manufacturer of the product you purchased, and whether you have released a new version of the hard drive firmware. HDD firmware is the software that manipulates the master, and its upgrade optimization will bring great benefits to your solid-state drive. Solid
1: The desktop home does not want to walk the line again. So went to a certain east bought a USB wireless network card. TP's wn725n USB, very small, is about the size of Logitech's superior receiver. 2: Drive can identify itself is not expected, since it is a USB card, insert USB, then LSUSB See the ID 0bda:8179 of a new line Realtek added root@debian:/# Lsusb Bus 001 Device 001:id 1d6b:0002 Linux Foundation 2.0 root Hub Bus 002 Device 001:id 1d6b:00 Foundation 3.0 Root Hub bus 003 Device 001:
------------------------------------------------------------------------------------------------- [768.307008] ==11==> hub_port_init 1[768.310661] Plug in USB Port3[768.495004] USB 5-1: New high Speed USB device number 4 using mstar-ehci-3[768.939901] USB 5-1: New USB device found, idvendor=0781, idproduct=5567[768.946801] USB 5-1: New USB device Strings:mfr=1, product=2, serialnumber=3[768.954111] USB 5-1: Product:cruzer Blade[768.958276] USB 5-1: Manufacturer:sandisk[768.962516] USB 5-1: seri
11-inch model is maintained at the 2013 model level. There are many similarities between the 2015 and 13 MacBook Air in some internal chips. Red: 8 sandisk 05131 016G 16GB NAND Flash (total 128GB) Orange: Marvel 88ss9183 PCIe SSD Controller Yellow: Samsung k4b2g1646e 2 Gb (DDR3 SDRAM) Motherboard Red: 1.6GHz Intel Core i5 5250U processor, integrated HD Graphics 6000 Orange: intel® DSL5520 Thunderbolt 2 controller Yellow:
MongoDB now has two storage engines MMAPv1 and Wiretiger, of course, in addition to these two storage engines there are other storage engines.Such as: Memory Engine: Now the MongoDB version already has, the main cache service, it is mainly to do unit testing. Mongo-rocks: is a key-value engine that is used as a hybrid layer for Facebook's rocksdb Fusion-io: This storage engine is created by SanDisk and he is as far as possible bypassi
On a reference to the original code, anti-code and complement (see http://www.linuxidc.com/Linux/2015-02/113862.htm), but he also smoothed a half-day, a little understanding of the appearance, but can not be clearly expressed. Now remember the following two points:The inverse code and the complement of positive numbers are the same as the original code;Negative inverse code, complement and the original code is different, negative anti-code: The original code to remove the sign bit, the other val
==integernewnum); A at //compare integers with Newinteger -System.out.print ("Integer and Newinteger:"); -System.out.println (integernum==integernewnum); - - //comparison of two Newinteger -Integer INTEGERNEWNUM1 =NewInteger (127); inSystem.out.print ("Newinteger and Newinteger:"); -System.out.println (integernewnum==integerNewNum1); to + //compare two declaration variables less than 128
=/usr/local/mysql/data2/db-app2.pid Datadir =/usr/local/mysql/data2 Log =/usr/local/mysql/data2/db-app.log User = mysql [Mysqld3] Port = 3308 Socket =/tmp/mysql. sock3 Pid-file =/usr/local/mysql/data3/db-app3.pid3 Datadir =/usr/local/mysql/data3 Log =/usr/local/mysql/data3/db-app.log User = mysql [Mysqld4] Port = 3309 Socket =/tmp/mysql. sock4 Pid-file =/usr/local/mysql/data3/db-app4.pid Datadir =/usr/local/mysql/data4 Log =/usr/local/mysql/data4/db-app.log User = mysql [Mysqldump] Quick Max_al
show all tcp socketss-u-a show all UDP Socektss-o state established '(dport =: smtp or sport =: smtp) 'display all established SMTP connections ss-o state established' (dport =: http or sport =: http) 'display all established HTTP connections ss-x src/tmp /. x11-unix/* Find out all processes connected to X Server ss-s list current socket details: Show sockets brief information list current connected, closed, waiting tcp connection # ss-sTotal: 3519 (kernel 3691) TCP: 26557 (Estab 3163, closed 2
course, there are many improvements to this disadvantage ). The core idea of bovw is as follows. Some people have asked, there are many methods to extract image features, such as sift Feature Extraction and star feature extraction. Why do we need to use bovw models to characterize the image? Because of Sift, the feature vectors obtained by star feature extraction machines are multidimensional. For example, the sift vectors are 128 dimensions, and an
, 0Fields (field): 128, 0, 128 purpleKeyWord ' return ' (keyword ' return '): 255, 0, 0 redKeyword excluding ' return ' (except for keyword return): 255, 128, 0 orangeLocal variable declarations (variable declaration): 128, 128, 128
deep understanding of the 8583 protocol Initially, the financial system only large IBM companies to provide equipment, such as host and terminal, and then many large and small companies to enter, how to design a message protocol to solve the financial system between the exchange of messages, the agreement is called the ISO8583 agreement. For example, the ' Repeat Member management system ' is used on POS machines for 8583 messages. The financial industry involved in the data content is relative
▲ Effect Chart The method is not difficult, specific as follows: 1. Create a new text document 2. Copy the following code into it (be careful not to omit it): ; Copyright©microsoft Corp. [Theme] ; Windows-ids_theme_displayname_aero Displayname=alldarkevev2 THEMEID={30C467D0-E8DB-46AC-BC88-C9A157F57D63} [Control Panel\Desktop] Pictureposition=4 [VisualStyles] Path=%systemroot%\resources\the
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