No Drive Letter for USB or Firewire Drive没有磁碟机代号为USB或FireWire驱动器
When you connect your USB or IEEE 1394 (Firewire) storage device (hard disk or USB drive) to your computer, Windows will pop up a notification messages that showing USB Mass Storage Device, and then Disk Drive was found.当您连接您的USB或IEEE 1394 （火线）存储设备（硬盘或USB驱动器）到您的计算机时， Windows会弹出通知的邮件显示USB大容量存储设备，然后在磁盘驱动器被发现。 However, you just simply can’t access the drive, and there is no automatic “Autoplay” prompt too, if you enable it.不过，你刚才根本不能访问的驱动器，并没有自动“自动”的提示太，如果您启用它。
The USB or Firewire storage drive doesn’t show up (not available and not accessible) in Windows Explorer or My Computer window, although it has been detected, even if the drive has been used properly before in the same computer. USB或FireWire存储驱动器并没有显示出来（无法使用，并且无法存取）在Windows档案总管或我的电脑窗口，虽然它已侦测到，即使驱动器已用于妥善之前，在同一台计算机上。 In the Device Manager, everything including USB Hub and USB Root Hub, shows working properly.在设备管理器，一切都包括USB集线器和USB根集线器，显示工作正常。 In some cases, it also shows a USB or Firewire storage drive attached and the drive it is working, and the USB or Firewire drive will appear in Disk Management of Computer Management in Microsoft Management Console (MMC) too.在某些情况下，它也显示了USB或FireWire存储驱动器的重视和干劲，这是工作，和USB或FireWire驱动器将出现在磁盘管理的计算机管理在Microsoft管理控制台（ MMC ） 。
Another symptom to the problem is when you insert the USB or Firewire drive, a “Safely Remove Hardware” icon will appear in Windows notification area (system tray).另一种症状，以问题是，当你插入USB或FireWire驱动器，一个“安全删除硬件”图标将出现在Windows通知区域（系统托盘） 。 When you double-click on the icon, the drive appears in the list, but when you display the details of the disk (by double-click on the drive or select the drive then click on Stop), there is no drive letter attached to the drive.当您双击该图标，驱动器出现在清单中，但是当你显示的细节磁盘（双击该驱动器或选择的驱动器，然后点击停止） ，是没有驱动器的信中所附驱动器。
The cause for this problem is that all drive letters are already assigned to other devices or mapped network drives, making no additional drive letters available.事业，对于这个问题，是所有驱动器字母已经分配给其他设备或映射的网络驱动器，无需额外的驱动器号可用。 Or it may be caused by the drive letter that previously assigned to the drive has been taken up by a mapped network drive or other storage device.或者它可能引起的驱动器的一封信中说，以前分配到的驱动器已经采取了由一个映射的网络驱动器或其他储存装置。
Resolution is to disconnect mapped network drives or other storage devices, freeing up a drive letter or the previously assigned letter to assign to the additional storage device.决议是要断开映射的网络驱动器或其他储存装置，释放一个驱动器号或以前分配的信分配给额外的存储设备。 If you can see the drive in MMC Disk Management, right click on it, and select Change Drive Letter and Paths, then click on Change.如果您可以看到驱动器在MMC磁盘管理中，右键点击它，并选择更改驱动器号和路径，然后按一下就改变。 Select a drive letter that is unused and click OK.选择一个驱动器号是未使用并单击确定。 The USB or IEEE 1394 drive can now be accessible.的USB或IEEE 1394驱动器现在可以访问。
It’s also possible to它的，也有可能 change drive letter to a free one via registry变更磁碟机代号，以一个自由一经登录 . 。
IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要说明 ：这是一个机器翻译网页是“按原样”提供的担保。 Machine translation may be difficult to understand.机器翻译可能很难理解。 Please refer to请参阅 original English article原来的英语文章 whenever possible.只要有可能。
Share and contribute or get technical support and help at分享和贡献，或取得技术的支持和帮助，在 My Digital Life Forums 我的数字生活论坛 . 。
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August 15th, 2008 18:00 2008年8月15日18时
Anthony Maw post #31 - thank you, you’ve fixed my problem.安东尼的规定最低工资后＃ 31 -谢谢您，您已固定我的问题。 Am on Vista and updated to Vista SP1 when a previously recognised external USB drive doesn’t show in Explorer anymore.上午在Vista上和更新，以Vista的SP1中，当先前确认外部的USB驱动器不会显示在Explorer了。 Followed your instructions re: Show Hidden Devices and it worked!其次是您的指示，重新：显示隐藏的设备和它的工作！ So thanks again.因此，再次感谢。
August 6th, 2008 10:24 2008年8月6日10时24分
Funny thing is that I went into MMC and accessed the drive via right click / explore… never thought to look for a conflicting drive letter.有趣的是我走进MMC和访问的驱动器经右单击/探索…从来没有想过要寻找一个冲突的驱动器号。 But you were right on the money.但你的权利，这笔钱。 Thanks!谢谢！
July 22nd, 2008 23:22 2008年7月22日23时22分
This was exactly the information I was looking for.这正是资料，我一直在寻找。 I knew what the problem was but I didn’t know where to change it.我知道什么问题，但我不知道哪里去改变它。 Thank you.谢谢您。
June 11th, 2008 04:27 2008年6月11日4时27分
the article described my problem to the t but the solution was one i had already attempted and which had failed.文章描述我的问题向吨，但解决的办法是一我已经尝试和已经失败。 after going through disk mgmt and assigning a drive letter i am able to explore it ONLY through disk mgmt, it still will not show up in my comp or explorer.经历了磁盘MGMT的并指派一个驱动器的信我可以向各位探讨它，只有通过磁盘MGMT的，但仍不会出现在我的补偿或总管。 furthermore, when i disconnect my usb drive and reconnect it later i have to follow the same procedures to access it, additionally, the letter i had previously assigned to it is no longer available in the drop down menu of available letters.此外，当我断开我的USB驱动器和重新后来我必须遵循同样的程序来访问它，此外，信中我曾以前分配给它的已不再可用在下拉菜单中的可用信。 the device works fine on all other computers and OS’s, i’ve had this problem for almost a year with no solution.该装置工程优良对所有其他计算机和操作系统的，我已经为这个问题，几乎有一年没有解决办法。 and no, i have no other drives interfering, just the c: and a cd drive.没有，我没有其他驱动器的干涉，只是在C ：和CD驱动器中。 any help would be appreciated任何帮助将不胜感激
May 26th, 2008 08:09 2008年5月26日8时09分
Great article.伟大的文章。 It is well written, gets straight to the point, and best of all, solved my problem.这是写得不好，得到直到一点，最重要的是，解决我的问题。 Thank you.谢谢您。
April 30th, 2008 03:22 2008年4月30日03:22
No Drive Letter for USB or Firewire Drive article…Thank you.没有磁碟机代号为USB或FireWire驱动器的文章…谢谢。 This article really helped.此文章真的有帮助。 Have a great day!有一个伟大的日子！
April 17th, 2008 03:46 2008年4月17日3时46分
The problem has two possibilities: One is that a mapped drive letter supercedes the physical drive letter that Windows wants to assign.这个问题有两种可能性：一种是映射驱动器的信取代物理驱动器的Windows一封信中说，要指派。 The solution is to change the highest mapped drive letter, like E: or F: drive to a letter lower down like G: or H: and then remount the USB drive.解决的办法是改变最高的映射驱动器的信一样， E ：在或F ：驱动器的信一样，降低克：或H ：然后装入USB驱动器。 This issue is documented on a M$ KB.这个问题是记录在一米或美元。 The other possible cause of the problem is that the volsnap.sys driver does not recognize the external USB device volume and thus does not assign it a drive letter.其他可能的问题的原因是因为volsnap.sys司机不承认外部USB设备的体积，从而不将它指派一个驱动器号。 The solution is to open Device Manager, click View and then Show Hidden Devices.解决的办法是打开设备管理器，单击查看，然后显示隐藏的设备。 Down the list under Storage Volumes there is an Unknown Device.下跌的名单下储存量有一个未知设备。 Right click on it, select Update Driver and let it automatically search.上按一下滑鼠右键，选择更新驱动程序，让它自动搜索。 It should reinstall the drive as a Generic Storage device and then correctly assign a drive letter after that.它应重新安装驱动器作为一个通用的存储设备，然后正确地分配一个驱动器的信后。
April 17th, 2008 03:44 2008年4月17日3时44分
The problem has two possible causes and different solutions:这个问题有两个可能的原因和不同的解决方案：
One is that a mapped drive letter supercedes the physical drive letter that Windows wants to assign.一，是一个映射驱动器的信取代物理驱动器的Windows一封信中说，要指派。 The solution is to change the highest mapped drive letter, like E: or F: drive to a letter lower down like G: or H: and then remount the USB drive.解决的办法是改变最高的映射驱动器的信一样， E ：在或F ：驱动器的信一样，降低克：或H ：然后装入USB驱动器。 This issue is documented on a M$ KB.这个问题是记录在一米或美元。
The other possible cause of the problem is that the volsnap.sys driver does not recognize the external USB device volume and thus does not assign it a drive letter.其他可能的问题的原因是因为volsnap.sys司机不承认外部USB设备的体积，从而不将它指派一个驱动器号。 The solution is to open Device Manager, click View and then Show Hidden Devices.解决的办法是打开设备管理器，单击查看，然后显示隐藏的设备。 Down the list under Storage Volumes there is an Unknown Device.下跌的名单下储存量有一个未知设备。 Right click on it, select Update Driver and let it automatically search.上按一下滑鼠右键，选择更新驱动程序，让它自动搜索。 It should reinstall the drive as a Generic Storage device and then correctly assign a drive letter after that.它应重新安装驱动器作为一个通用的存储设备，然后正确地分配一个驱动器的信后。
Anthony Maw, Vancouver, Canada安东尼的规定最低工资，在加拿大温哥华
mailto:anthony@maw.bc.ca电子邮件地址： anthony@maw.bc.ca
tel/sms +1 604 318 9994电话/短信一六零四三一八九九九四
March 18th, 2008 13:00 2008年3月18日13时
This information really helped.这方面的资料真的有帮助。 My TSonic 610 MP3 player was not getting assigned a drive letter on Windows XP.我tsonic 610 MP3播放器是得不到指派一个驱动器号在Windows XP上。 I followed the instructions and went to Disk Management and assigned a different drive letter to the MP3 player.我在的指示，并到磁盘管理和分配不同的磁碟机一封信给MP3播放器。 The problem was that the drive letter was already in use by a mapped network drive.问题是，驱动器这封信是已在使用中所映射的网络驱动器。 Thanks a lot for sharing this information.感谢了很多分享这方面的资料。
March 15th, 2008 20:01 2008年3月15日20时01分
I had a similar problem and I was able to resolve it.我有一个类似的问题，我是能够解决这个问题。 I found that the USB port connecter was not making complete contact with the hard dsik drive.我发现USB连接埠connecter没有作出完整的联络与努力dsik驱动器。 I pressed it a little hard until all the pins were inserted completely. i按下它一点努力，直到所有的管脚完全插入。 Then I plugged the USB cable to my computer and was able to see it in device manager in “Not initialized” status.然后我插入USB电缆，以我的电脑，并能够看到它在设备管理器，在“未初始化”的地位。 To initialise it I had to format the drive and lose all the data in my external hard disk.以initialise它，我不得不格式的驱动器和失去所有的数据在我的外接式硬碟。
If I can remember correctly I noticed this issue after my computer crashed and after restarting my computer, it was running the disk check program which was deleting some indexing or something like it.如果我能记错我发现这个问题后，我的电脑坠毁，重新启动后我的电脑，这是运行磁盘检查程序被删去一些索引或类似的东西。 These files were part of my external hard disk.这些档案的一部分，我的外接式硬碟。
December 1st, 2007 12:46 2007年12月1日12时46分
I installed a new 120 gig Seagate hard drive with OEM install CDs from IBM/Lenovo for my Thinkpad.我安装了一个新的120演出希捷硬盘驱动器的OEM安装光盘从IBM /联想为我的ThinkPad 。 I’ve spent three days trying to solve this problem; I have tried the registry solution presented here, the disk management solution, using Acronis Disk Director Suite, and anything else I could find on the web TO NO AVAIL.我已经用了3天，试图解决这个问题;我曾尝试登录的解决办法在这里提出，磁盘管理解决方案，使用Acronis磁盘主任套房，以及其它任何我可以找到在互联网上不得要领。 I tried to delete the keys and that worked, but once I try to plug in any type of non-hard drive based device Windows XP Pro acts like a blind man with Alzheimers: it thought my USB flash drive was a PCI MODEM!我试图删除键和工作，但一旦我尝试以堵塞在任何类型的非硬盘驱动器为基础的设备Windows XP专业版的行为像一个盲人男子与阿尔采末：它以为我的USB闪存驱动器是一个PCI调制解调器！
If I switch back to my trusty Fujitsu (which used the same system restore CDs by the way) everything is detected with no problems.如果我切换回我的可信赖日本富士通公司（即使用相同的系统还原光碟由单程） ，一切是检测没有问题。 WTF. wtf 。 Seriously Microsoft, go poke your eyes out with a stick.认真微软，去戳你的眼睛与大棒。 You won’t even stand behind your own product- charging $99.99 - $550 for incident support is worse than highway robbery.你不会的立场，甚至落后于您自己的产品收费99.99美元-5 50元，为事件的支持不如拦路抢劫。 It’s like selling cars without a steering whell and charging for brakes.这就像卖车没有一个督导whell和收费刹车。 Keep it up and this life-long PC user who has less and less time for foolishness will buy a Mac.保持和这辈子长的PC用户谁已越来越少，时间为愚蠢将购买Mac上。 That’ll teach you.这会教你。 (yeah, I know it won’t, but it felt good saying it…). （嗯，我知道它不会，但感觉很好，说… … ） 。
November 29th, 2007 04:24 2007年11月29日4时24分
Ok, here is my usb problem确定，这里是我的USB问题
I have a user that when you insert his USB device it assigns it to a network drive.我有一个用户，当你插入USB设备，他指派到一个网络驱动器上。 I go into the computer management and change it to another drive.我去到计算机管理和将它更改为另一个驱动器。 It see it fine.它看到它的罚款。 I then plug in a new usb device and it once again reverts to the network drive.当时我堵塞在一个新的USB设备和它再次回归到网络驱动器。 I does not keep the setting for the USB that I had assigned to it. i并没有设置的USB ，我已分配给它。 It is on a windows XP environment and the system is locked down so that users cannot access the internet without prior approval.这是在Windows XP环境和制度是锁定，使用户无法访问Internet未经事先批准。 The user has had access with the usb drive in the past and I can change it but only for that USB drive.用户已获得与USB驱动器，在过去，我可以改变它，而只是为USB驱动器。 I have gone into administrative tools, computer management, service applications, services, MSsoftware shadow copy provider, then start-up type: set to “automatic” and the service status I clicked start thinking that this might work.我已经到管理工具，计算机管理，服务，应用，服务， mssoftware阴影复制供应商，然后开始行动类型：设置为“自动”和服务的地位，我点击开始思考，这可能工作。 It did not.它没有。 Anyone with a suggestion as to how to solve this I would greatly appreciate it.任何一个建议，至于如何解决，这点我会非常感谢。