USB设备无法识别的五大原因
来源：U大侠
　　U盘的出现给我们带来了很大的方便，它的作用主要是用于储存和传输数据等，因此也备受消费者们的欢迎。但是有不少的用户在将U盘插入电脑使用的时候，都有遇到过USB设备无法识别的情况，这是怎么回事呢？今天U大侠小编就和大家说说USB设备无法识别的原因。
　　1、在USB读写时千万不可将其拔出，不然可能烧毁设备，win7系统任务栏中多出USB设备额图标，打开该图标就会在列表中显示U盘设备，选择将该设备停用，然后你再拔出设备，这样会比较安全。
　　2、可能是USB接口电压不够。当把移动硬盘接在前置USB口上时就有可能发生系统无法识别出设备de故障，因为移动硬盘功率比较大要求电压相对比较严格，前置接口可能无法提供足够的电压，当然劣质的电源也可能会造成这个问题。解决方法：移动硬盘不要接在前置USB接口上，更换劣质低功率的电源或尽量使用外接电源的硬盘盒。
　　3、主板和系统的兼容性问题，最著名的就是NF2主板与USBde兼容性问题。假如是在NF2de主板上碰到这个问题的话，则可以先安装最新denForce2专用USB2.0驱动和补丁、最新的主板补丁和操作系统补丁，还是不行的话尝试着刷新一下主板deBIOS一般都能解决。
　　4、系统或者BIOS问题，当你在BIOS或操作系统中禁用了USB时就会发生USB设备无法在系统中识别。解决方法系开启与USB设备相关de选项。就系开机按F2或DEL键，进入BIOS，把enable usb device选择enable即可。
　　5、前置USB线接不正确。当主板上deUSB线和机箱上de前置USB 接口对应相接时把正负接反就会发生这类故障，因为正负接反很可能会使得USB设备烧毁。所以尽量采用机箱后置deUSB接口，也少用延长线。也可能是断口有问题，换个USB端口看下。
　　另外要注意：大家WINDOWS下格式化时要选择FAT，不要选FAT32。
　　相关文章：
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　(满)　(满)　(满)RabbitMQ - Plugins
RabbitMQ supports a variety of plugins. This page documents
the plugins that ship with RabbitMQ 3.6.8.
To enable plugins, use
rabbitmq-plugins enable plugin-name
And to disable plugins again, use:
rabbitmq-plugins disable plugin-name
You can see a list of which plugins are enabled with:
rabbitmq-plugins list
The rabbitmq-plugins comand will enable or
disable plugins by updating the plugin configuration
file. It will then contact the running server to tell it to
start or stop plugins as needed. You can use the
-n option to specify a different node, or use
--offline to only change the file.
For more information on rabbitmq-plugins,
In addition to the plugins bundled with the server, we also
offer binary downloads of plugins which have been
contributed by authors in the community. See the
more detail on which plugins are available and how to
install them.
rabbitmq_auth_backend_ldap
Authentication / authorisation plugin using an external
LDAP server.
rabbitmq_auth_mechanism_ssl
Authentication mechanism plugin using SASL EXTERNAL to authenticate
using SSL client certificates.
rabbitmq_consistent_hash_exchange
Consistent hash exchange type.
rabbitmq_federation
Scalable messaging across WANs and administrative
rabbitmq_federation_management
Shows federation status in the management API and UI. Only
of use when using rabbitmq_federation in conjunction with
rabbitmq_management. In a heterogenous cluster this
should be installed on the same nodes as rabbitmq_management.
rabbitmq_management
A management / monitoring API over HTTP, along with a
browser-based UI.
rabbitmq_management_agent
When installing the management plugin on some
of the nodes in a cluster, you must install
rabbitmq_management_agent
on all of the nodes in the cluster. You can install the
full management plugin on as many of the nodes as you
rabbitmq_mqtt
An adapter implementing the MQTT 3.1 protocol.
rabbitmq_shovel
A plug-in for RabbitMQ that shovels messages from a queue on
one broker to an exchange on another broker.
rabbitmq_shovel_management
Shows shovel status in the management API and UI. See the
Only of use when using rabbitmq_shovel in
conjunction with rabbitmq_management. In a
heterogenous cluster this should be installed on the same
nodes as rabbitmq_management.
rabbitmq_stomp
support in RabbitMQ.
Currently, all plugins below are experimental. This
means we make no claims about their fitness for purpose or
stability, though they are in general under active
development.
rabbitmq_management_visualiser
Broker topology visualiser plugin which is itself a plugin
to the management plugin. Adds a Visualiser tab to
the management web interface, which then flexibly and
interactively displays channels, queues and exchanges, and
the links between them.
rabbitmq_tracing
Adds message tracing to the management plugin. Logs
messages from the
a couple of formats.
rabbitmq_web_stomp
A bridge exposing rabbitmq_stomp to web
browsers using WebSockets, using the WebSockets emulation
/ compatibility
rabbitmq_web_stomp_examples
Adds some basic examples to
rabbitmq_web_stomp: a simple "echo" service
and a basic canvas-based collaboration tool.
rabbitmq_amqp1_0
An implementation of the AMQP 1.0 protocol.
In This PageRelated Linksscala - Intellij sbt sbt-native-packager and enablePlugins error - Stack Overflow
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I have an sbt build that works when I run from the command line, but that Intellij does not like. My Intellij is running on Linux, its version is 14.1.4, my scala plugin is 1.5.2.
Intellij complains about my use of enablePlugins(JavaAppPackaging). The error is "Expression Type (DslEntry) must conform to Setting[_] in SBT file".
My project/build.properties file:
sbt.version=0.13.8
My project/plugins.sbt
addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.0.3")
And the first few lines of my build.sbt
enablePlugins(JavaAppPackaging)
organization := "org.bodhi"
name := "jar-patch"
version := "1.0"
The answer by @lifeGoGoGo on another thread
works for me (on Ubuntu, setting the custom sbt-launcher.jar in global settings and project settings of IntelliJ IDEA - as sensibly answered by @Mustafa on this thread - wasn't enough, but then adding the "lazy val" tactic was enough). So for example, this worked for me in build.sbt (obviously you change your plugin-details to suit what you are doing, as this issue is caused by IntelliJ and not by the specific plugin you want to enable):
lazy val root = (project in file(".")).
enablePlugins(ScalaJSPlugin).
name := "Scala.js Tutorial",
scalaVersion := "2.11.7",
version := "1.0"
IntelliJ uses a bundled SBT launcher which might be a different version than what you are running in the command line.
Since you already know that command line SBT works, you may point IntelliJ to use the command line SBT instead of the bundled one.
Go to settings page for SBT at Settings -& Build, Execution, Deployment -& Build Tools -& SBT.
In the launcher section, choose Custom and point to the SBT launcher installed in the OS. In Ubuntu, the default location is /usr/share/sbt-launcher-packaging/bin/sbt-launcher.jar
@karol: I had the same problem. I solved by choosing again at the moment of opening the project /usr/share/sbt-launcher-packaging/bin/sbt-launcher.jar in
"Import Project from SBT" -> Global SBT settings.
The issue is due to how IntelliJ IDEA marks syntax errors, which may mark valid code red. This particular error will be fixed soon.
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AndroidStudio异常： Plugins Suggestion Unknown features (Run Configuration[AndroidRunConfigurationType], Facet[android, android-gradle]) covered by disabled plugin detected. Enable plugins... Ignore Unknown Features
Plugins SuggestionUnknown features (Run Configuration[AndroidRunConfigurationType], Facet[android, android-gradle]) covered by disabled plugin detected. Enable plugins... Ignore Unknown Features
如上，今天碰到一个奇怪的问题。中午匆匆忙忙把电脑（win7）关机，这时候AS还没有完全退出，然后我选择了强制关机。当我下午打开AS时，提示上面的错误，于是在Google上找到了答案（答案在3楼）：
这是因为android surport没有被勾选导致的，勾选一下重启AS就可以了方法：左上角File &&
Setting && Plugins && 把Android Support勾选上，点击Apply，再点OK，会提示重启，重启完就好了。
希望对你有帮助！}