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Environment: Solaris 10,oracle 11.2.0.4 2nodes RACSymptoms: Rman backup error is as followsRMAN-00571: ===========================================================RMAN-00569: =============== ERROR MESSAGE, STACK follows ===============RMAN-00571: ===========================================================Rman-03009:failure of allocate command on DEV_0 channel at 12/05/2014 10:25:25Ora-19554:error allocating device,
Device files: block Device file B: A device that is randomly accessed by block;character device file C : by character, linear device;Common block device file B: HDDDevice file name for the hard disk device:IDE, ATA:HDSATA, SCSI, U
I. Linux USB driver levels 1. devices, configurations, interfaces, and endpointsThe logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has one or more configurations: Each USB device provides different levels of configuration information,
/*** Device_create-creates a device and registers it with sysfs* @ Class: pointer to the struct class that this device shoshould be registered* @ Parent: pointer to the parent struct device of this new device, if any* @ Devt: The dev_t for the char device to be added* @ Drvd
I. Overview Speaking of writing I2C drivers in Linux, there are currently two main methods: one is to treat I2C devices as a common character device, the other is to use the Linux I2C driver architecture. The two drivers are compared below. The advantages of the first method (corresponding to the disadvantages of the second method) include:● The idea is straightforward and you don't need to take the time to understand the complex I2C subsystem operati
How to use the platform device driver to write the driver:-------------------------------------------------------------------------1. Implement device orientation first:1) read the chip manual and obtain resources from the schematic diagram.2) construct a platform device structure and add platform Resources3) link our device
Linux MTD (Memory technology Device) subsystem analysisFor Atheros Char deviceRead the Linux MTD Source code Analysis to this part of the overall understanding, combined with the existing code, analysis of how Atheros MTD is used.Linux kernel:2.6.31.Atheros platform:qca9890???Refer to the Linux MTD Source code Analysis , where MTD is divided into 4 layers, from top to bottom: Character device node, characte
If you have multiple Android devices (including Android emulators) connected to your PC, you will need to use the Adb-s DeviceID shell when you enter the console. More trouble, this article has written a shell script file (need to be used under Linux or OS X, Windows needs to be newly written with bat or cmd).The basic idea is to use the ADB devices command to scan how many Android devices are connected to the PC, then intercept the device name from t
Recently encountered this problem of headache, baffled its solution, fools, cantilever thorn shares these things have done, finally see hope, so save, feel tidy share to everyone, hope to help.The initial understanding of cell phone resolution and web pixel is that it is twice times the difference.But what's puzzling is why we need 1.325 of this data, which is what it turns out to be:Give me a chestnut:The following is my excerpt and translation, want to know more text at the end of the link ha
As you know, on Windows IoT Core, if you use hardware such as a USB sound card and a camera with a microphone outdoors, you'll have multiple audio devices available. However, the system does not currently provide a direct UI to set the audio input or output device. After review, we can use the command line to change the default audio device, as follows.In the case of Raspberry Pi, I use a USB sound card, pl
This mainly covers the bindings between the coordinator and the terminal.This mechanism uses a button press or other similar action at the selected devices to bind within a specific timeout perio D. The End Device Bind Request Messages is collected at the coordinator within the timeout period and a resulting bindin G Table entry is created based on the agreement for Profile ID and cluster ID. The default end devic
Access Control of Device Files: exclusive devices, restrict access by only one user (Single User Access) at a time, block user access, and copy the device when the device is turned on. Exclusive devices are mainly used to allow drivers to maintain a atomic_t variable. This variable is initialized to 1, indicating that it is available. When open is enabled, it is
In the above-mentioned Drive series blog, we have learned about blocking and non-blocking, asynchronous notification, polling, memory and I/O port access, concurrency control and other knowledge, the key device driver is relatively simple, this chapter content can deepen our character device driver architecture, blocking and non-blocking, Interrupt timer and other relevant knowledge of the understanding. In
After sorting and digesting the device model, you have the foundation to compile a device driver program. You need to be familiar with the driver of the USB device because of the working relationship. Therefore, select the driver of the USB device as the start point. How can a USB
Directory: http://www.cnblogs.com/WuCountry/archive/2008/11/15/1333960.html[Do not provide illustrations. You are advised to download the source book from the Internet] 5.7. initializing the device handling layer: net_dev_initDevice processing layer initialization: net_dev_init An important part of initialization for the networking code, including traffic control and per-CPU ingress queues, is running med at boot time by net_dev_init, defined in n
In Unix-like operating systems,Loop Device,LoopbackDevice,VND(Vnode disk), orLofi(Loopback FileInterface) is a pseudo-device that makes a fileAccessible as a pseudo-device. A loop device may allow some kindData elaboration during this redirection; for example, the device may
A new set of driver management and registration mechanisms have been introduced from Linux 2.6:P latform_device and Platform_driver.Most of the device drivers in Linux can use this mechanism, the device is represented by Platform_device, and the driver is registered with Platform_driver.Compared with the traditional device driver mechanism (registration via Drive
Brief introduction A block device driver accesses a device primarily by transmitting a fixed-size random data Linux kernel video block devices are basic device types that differ from character devices The Linux block device driver interface allows the block d
Using asynchronous notifications in device drivers can make access to the device accessible to the application by the driver when it is accessible. Therefore, applications that use nonblocking I/O do not need to poll the device for access, and blocking access can be superseded by asynchronous notifications like "break". Asynchronous notifications are similar to t
Main device number and secondary device number Those names are called special files, device files, or nodes that are simply called file system trees, and they are usually located in the/dev directory Typically, the main device number identifies the driver that corresponds to the
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