transmission. Which of the four types of transmission a device can support is the property of the device itself, which is determined during hardware design. For example, a pure USB flash drive must support batch transmission and control transmission. Different transmission requirements have different endpoints, so for a USB
Some people say that the optical drive will not be used in the future. The Blu-ray HD format has just been defeated by the hddvd format, and it is too late to celebrate the victory. The fate of the optical drive will soon be eliminated. With the increase in network bandwidth and the popularization of Mobile 3G/4G, as the capacity of hard disks and USB
Rome was not built in one day. Before making the USB flash drive work, we actually made a lot of preparations for the driver. We continue to follow our feelings. storage_probe (), 972 to 975 rows, and a series of functions named init _ * are called at the moment. here some lock mechanisms and wait mechanisms are involved, but...
Rome was not built in one day. Be
unsigned int delay_use = 5;
111 module_param (delay_use, uint, S_IRUGO | S_IWUSR );
112 MODULE_PARM_DESC (delay_use, "seconds todelay before using a new device ");
Set delay_use to 5, while module_param is a macro provided by Linux Kernel 2.6, so that delay_use can be set when the module is loaded. (If this parameter is not set, the value 5 indicates that a new device is waiting for a delay of 5 seconds .) Why latency? When the inserted USB
The first step is to view all the current disk information and find the device ID of the USB disk. For example:/dev/sdb specific operation method: (1) enter the sudofdisk-l command in the terminal and press enter to view all current disks. (2) Check the USB flash disk or the disk information you need to search for. You can exclude it by knowing the disk size. Aft
Rome was not built in one day. Before making the USB flash drive work, we actually made a lot of preparations for the driver.
We continue to follow our feelings. storage_probe (), 972 to 975 rows, and a series of functions named init _ * are called at the moment. Here some lock mechanisms and wait mechanisms are involved, however, it is only initialization, but i
When a USB flash drive or camera is inserted into the USB port, how can the program detect it?Hey, what the landlord wants is similar to a small program I recently wrote. The following is my simple USB flash
will have a different ending. When the birds choose to fasten gold on the wings, it means that it gives up its wings and fly high; choosing cloud-sky fight means giving up the burden of being out of the body.
So here, we need to carefully check the path we have chosen. Obviously, we have already said that for a USB flash drive, spec specifies that it belongs to
high; choosing cloud-sky fight means giving up the burden of being out of the body.
So here, we need to carefully check the path we have chosen. Obviously, we have already said that for a USB flash drive, spec specifies that it belongs to the bulk-only transmission mode, that is, its US-> protocol is us_pr_bulk. This is just determined in get_device_info. Theref
introduce it later.
Our story is based on the drivers/usb/storage directory. In fact, the code here clearly shows how the USB flash drive we frequently access is working and how it is driven. But the code in this directory does not live in a paradise. They are always closely related to the outside world. You can cont
For a USB-enabled motherboard to be installed on a USB flash drive, you must first prepare a hard drive with a system installed to complete the following steps.
1
1, using BOOTICE.EXE to write to the hard disk master boot record as Grubdos, the startup file name is GRLDR
The following describes the usb_stor_control_thread () function. What wakes up is the up ( (us-> sema) from the queuecommand, and us-> sulfate is assigned to the Server Load balancer, in contrast, the Server Load balancer is a parameter passed in when the SCSI core layer calls the queuecommand. Focus on usb_stor_control_thread (). Row 3: As mentioned earlier, we have to look at the dev_mutex lock from a higher perspective after reading the entire module.
Line 3: If us_fw.x_disconnecting is set,
The following describes the usb_stor_control_thread () function. What wakes up is the up ( (US-> SEMA) from the queuecommand, and us-> sulfate is assigned to the Server Load balancer, in contrast, the Server Load balancer is a parameter passed in when the SCSI core layer calls the queuecommand. Focus on usb_stor_control_thread (). Row 3: As mentioned earlier, we have to look at the dev_mutex lock from a higher perspective after reading the entire module.
Line 3: If us_fw.x_disconnecting is set,
Get what we need from the two tables, and then the following code is expanded around the two pointers. (Unusual_dev and id) continue to read get_device_info ().
Row 3: Record unusual_dev in us. There is also such a member in us. In this way, it will be easy to use after recording. Because us runs through the whole story, it is very convenient to access its members and can be accessed at any time, however, the us_unusual_dev_list and storage_usb_ids tables will not be reused this time. Because w
Use an 8 gb usb flash drive to create multiple USB SeriesInitial Exploration of the System Boot Disk
Tool preparation: (search online)Can be found)
1. hp formatting tool.Rar
2. grub4dos-0.4.3-07-08-27.rar
3. grubutil-1.1-bin-w32-19.rar
4. UT163 Mass Production EngineerUT163 MPTool setup-v3.9.29.0.rar
5.
I have always recommended using group policies to disable automatic playback. Today, I saw a question post in the forum. This post attempts to describe a point of view-to avoid double-clicking or inserting a USB flash drive (mobile hard drive) poisoning, the Group Policy Editor alone is invalid. You need to modify the
Reprinted from: http://blog.csdn.net/helen_phding/article/details/6563303
Now more and more friends are switching from the PC camp to the Mac camp. Because they are two completely different operating systems, the compatibility is not very good, so many people have encountered some problems, today, I will discuss with my friends the problem of USB flash drives and mobile hard
What should I do if my computer cannot recognize the USB flash drive?
Right-click my computer and select "manage" from the shortcut menu to open the "Computer Management" window. In the computer management window, select disk management under "Storage". If you can see a USB flash
A 64 m old USB flash drive is useless. If the USB flash drive is large enough, you can use more powerful mini Linux and winpe with more tools. This time we installed winpe + maxdosv6plux + dwarf dos5.3 + cdlinux0.4.9 + mclinux2.02
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