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REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC FULL
REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC PORTABLE
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REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC WINDOWS

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. For example, figure below shows a Sandisk Cruzer micro USB flash drive. Inside the binary data, there will be trace of the name of the device that this registry key represents. In this case, double click on each remaining registry key values to view its binary data.

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.

Same case with CD-ROM or DVD-ROM optical drive as above reasoning.

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.

Exclude \DosDevice\C: which normally is the system root drive.

Exclude \DosDevice\A: and \DosDevice\B: which normally reserved for floppy disk drives.

Here’s a guidelines that you can follow to quickly determine which registry key is linked to your conflicted drive letter: 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.

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.

REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC WINDOWS

If you run above 2 steps in OS earlier than Windows XP, quit regedt32.exe and run regedit.exe.

Change and revert back this setting when you are finished with the reset of the steps.

REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC FULL

Optional step which is not required in Windows XP or later: Check the option to make sure that Administrators have full control to the registry key.

You can also click Permissions from the Security menu.

Optional step which is not required in Windows XP or later: Right click on MountedDevices, then select Permissions.

Navigate to the following registry key:.

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.

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.

REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC PORTABLE

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. In this situation, there is another workaround hack to fix the no USB or FireWire drive issue.

REGEDT32 ADD PARTION NEW FOR MAC DRIVE ON PC FREE

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. There is a solution to USB or FireWire drive not showing in system error. Another possible reason is all 26 letters in alphabet has been used, but this situation is rare and unlikely. The cause is probably due to ‘stupid’ behavior of Windows 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. In Windows operating system especially Windows XP, when plug in external USB or FireWire mass storage device such as USB key, flash drive, portable hard drive, 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.