Change or Delete System Drive Letter via Registry to Remove Conflict USB or FireWire Drive Letter變更或刪除系統驅動器的信通過註冊表，以消除衝突的USB或FireWire驅動器的信

In Windows operating system especially Windows XP, when plug in external USB or FireWire mass storage device such as USB key, flash drive, portable harddrive, the drive is not been assigned a drive letter by the system, hence the USB drive or FireWire drive is not showing in Explorer and no AutoPlay or AutoRun window pops up, although the device has been detected, in Safely Remove Hardware (show device but with no drive letter) wizard.在Windows操作系統特別是Windows XP中，當插件在外部的USB或FireWire大容量存儲設備如USB密鑰，閃存驅動器，便攜式硬盤，驅動器是不可被指派一個驅動器號由系統，因此， USB驅動器或FireWire驅動器是未顯示在Explorer和沒有自動播放或自動運行窗口，持久性有機污染物，雖然該裝置已偵測到，在安全刪除硬件（查看設備，但是沒有驅動器號）嚮導。 The cause is probably due to ’stupid’ behavior of XP where it won’t find an available letter from free letters pool when the USB or FireWire external drive which has previously mounted and assigned a drive letter is been inserted to computer USB or FireWire port again, but that previously allocated drive letter has been taken up and used by another storage devices.原因可能是由於'愚蠢的'行為XP的情況下它不會找到一個可用的信從免費的信件池時， USB或FireWire外接式磁碟機，其中先前已展開，並指派一個驅動器的信是被插入電腦USB或FireWire端口再次，但以前分配的驅動器的信件已採取的行動和所使用的另一種存儲設備。 Another possible reason is all 26 letters in alphabet has been used, but this situation is rare and unlikely.另一個可能的原因是所有26個字母在字母表一直使用，但這種情況是罕見的和不可能的。

There is a有一個 solution to USB or FireWire drive not showing in system error解決的USB或FireWire驅動器不會顯示在系統錯誤 . 。 However, the disconnect conflicted storage device to free up the drive letter fix may not practicable or usable by some, such as computer which are on a network or system running data transfer activity to all its drive assignments continuously flow without stopping, and thus disconnect or reassigning any mapped drives, networked drives, removable drives or other storage drives is not an option.不過，斷開衝突，儲存裝置，以騰出的磁碟機代號修補程序可能並不可行，或實用一些，如電腦，這是對一個網絡或系統運行的數據傳輸活動，其所有驅動器的任務，不斷流不停車，從而斷開或重新任何映射的驅動器，網絡驅動器，可移動驅動器或其他存儲驅動器，是不是一種選擇。

In this situation, there is another workaround hack to fix the no USB or FireWire drive issue.在這種情況下，有另一種可行哈克修復沒有USB或FireWire驅動器的問題。 The workaround fix relies on the registry tweak below to change the drive letter that has been previously assigned to the mounted USB or FireWire portable mobile flash or hard disk drive.替代修補程序依賴於註冊表調整下面的更改驅動器一封信中說，先前已分配給安裝的USB或FireWire便攜式移動Flash或硬盤驅動器中。 Or if users wish, can opt to delete any reference to the detected drives by the device so that when the storage device is plugged in again, the whole drive letter assignment will be start from fresh, and clean.或如果用戶願意，可以選擇刪除任何參考檢測驅動器裝置，因此當存儲設備是在再次堵塞，整個驅動器號分配將開始從新鮮，清潔。

1. Login to Windows as an Administrator.登錄到Windows作為管理員。
2. Open Registry Editor by typing regedit (or regedt32.exe in older Windows prior to XP) in Run command of Start Menu and then press Enter.打開註冊表編輯器中鍵入regedit （或Regedt32.exe在舊的Windows XP中前）在運行命令的開始菜單，然後按下ENTER 。
3. Navigate to the following registry key:瀏覽到以下註冊表項：

   HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices hkey_local_machine \系統\ mounteddevices

4. Optional step which not required in Windows XP or later, right click on MountedDevices , then select Permissions .可選步驟，其中不須在Windows XP或更高版本中，右鍵點擊mounteddevices ，然後選擇權限 。 You can also click Permissions from the Security menu.您也可以點擊的權限從安全菜單上。
5. Optional step which not required in Windows XP or later, check the option to make sure that Administrators have full control to the registry key.可選步驟，其中不須在Windows XP或更高版本，請檢查選項，以確保管理員有完全控制到註冊表中的關鍵。 Change and revert back this setting when you are finished with the reset of the steps.變化和回复此設置，當您完成重置的步驟。

   

6. If you run above 2 steps in OS earlier than Windows XP, quit regedt32.exe and run regedit.exe.如果您運行上述2個步驟，在操作系統Windows XP之前，退出Regedt32.exe和運行Regedit.exe 。
7. Also in the HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices registry branch selected, in the right pane, find and locate a registry value which represents the troubled USB or FireWire drive.此外，在HKEY_LOCAL_MACHINE \系統\ mounteddevices註冊表分支選中，在右窗格中，找到並找到註冊表值代表的困擾USB或FireWire驅動器。 The registry key should have the name that resembles the format of \DosDevice\X: where X can be any alphabet letter which corresponding to your physical system drive letter.註冊表項應該有名稱類似於格式\ dosdevice \ x ：其中X可以是任何英文字母排列的信相應到您的物理系統的驅動器號。

   

   Here’sa guidelines that you can follow to quickly determine which registry key is linked to your conflicted drive letter:以下是指引，您也可以按照迅速確定哪些註冊表項是連接到您的衝突，磁碟機代號：

   • Exclude \DosDevice\A: and \DosDevice\B: which normally reserved for floppy disk drives.排除\ dosdevice \一：和\ dosdevice \ B組：通常保留給軟盤驅動器。
   • Exclude \DosDevice\C: which normally is the system root drive.排除\ dosdevice \ c ：通常是系統的根驅動器。
   • If you have more than one fixed hard disk drives, then any drive letters that are using by them is not possible linked again, UNLESS the additional hard disk drive is added AFTER you first use the USB or FireWire device that now unable to show.如果你有一個以上的固定硬盤驅動器，那麼任何驅動器號正在使用他們是不可能再次聯繫，除非額外的硬盤驅動器是補充後，你第一次使用的USB或FireWire設備，現在無法顯示。
   • Same case with CD-ROM or DVD-ROM optical drive as above reasoning.同一案件具有CD - ROM或DVD - ROM光盤驅動器作為上述推理。
   • If you have inserted and mounted a lot of thumbdrives, USB flask drive, or external hard disks before, you will likely still see a lot of remaining registry values that you won’t know which is which.如果您有插入，並採取了很多thumbdrives ，瓶的USB驅動器或外置硬盤前，您可能會仍然看到了不少，其餘的註冊表值你不會知道哪個是哪個。 In this case, double click on each remaining registry key values to view its binary data.在這種情況下，雙擊對每個其餘的註冊表項的值，以檢視它的二進制數據。 Inside the binary data, there will be trace of the name of the device that this registry key represents.內二進制數據，將有微量的名稱，該裝置此註冊表項的自覺性。 For example, figure below shows a Sandisk Cruzer micro USB flash drive.舉例來說，下面的數字顯示， SanDisk的Cruzer Micro盤USB閃存驅動器。

     

     With this information, search for a registry value that contains name of your USB or FireWire drive brand and model that having problem showing up in Explorer.與這方面的資料，尋找一個註冊表值包含的名稱，您的USB或FireWire驅動器的品牌和型號，考慮的問題，顯示在瀏覽器。

8. Once the correct registry value is determined (for example, \DosDevices\F:), right click on the registry value name, and the select Rename .一旦正確的註冊表值是確定的（例如， \ dosdevices \傳真： ） ，右擊該註冊表值的名稱，並選擇重命名 。

   

9. Change the drive letter (in the example is F) to another unused drive letter that hasn’t been used by another other drives, then press Enter.改變驅動器號（在該例子是f ）向另一未使用的驅動器一封信中說，尚未使用的另一種驅動器，然後按下ENTER 。
10. Now insert and plug in the USB or FireWire device into the port again (if it’s already inserted, take it out and re-insert again).現在插入插頭在USB或FireWire設備進入港口再次（如果它已經插入，採取出去，重新插入再次） 。 The drive letter for the USB and FireWire should now appear and you can use the drive normally and properly again.磁碟機代號為USB和FireWire現在應該會出現，您可以使用的驅動器通常和妥善再次。
11. For OS earlier than Windows XP which you have previously change the permissions for the registry key, quit Regedit.exe and start Regedt32.exe, and change the permissions back to the previous setting for Administrators (which should be Read Only).操作系統Windows XP之前您先前在改變權限的註冊表項，退出Regedit.exe和啟動Regedt32.exe ，和更改權限返回到以前的設置為管理員（應唯讀） 。

It’s also possible to simply delete the devices registry keys instead of renaming it.它也可能只需刪除設備的註冊表項而不是重新命名它。 Deletion is helpful is users really can’t find the the registry value for the drive letter that having problem.刪除是有幫助的是用戶真的無法找到該註冊表值為驅動器一封信中說，有問題。 But make sure that you do a backup for the registry branch by exporting MountedDevices key, as mistake may cause your system unbootable.但請確認您做了備份註冊表中科出口MountedDevices項，錯誤可能會導致您的系統無法啟動。 The delete all possible USB drives, FireWire drives and external drives which have drive letter temporarily only when inserted in the system, and DO NOT delete any of the fixed hard disk drives or CD/DVD optical drives registry values.刪除所有可能的USB驅動器， FireWire硬盤和外接式磁碟機，其中有磁碟機代號暫時只有當插入在該系統中，並沒有刪除任何固定的硬盤驅動器或CD / DVD光碟機的註冊表值。

IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要說明 ：這是一個機器翻譯網頁是“按原樣”提供的擔保。 Machine translation may be difficult to understand.機器翻譯可能很難理解。 Please refer to請參閱 original English article英文原版的文章 whenever possible.只要有可能。

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