C# Ejecting a USB Pen Drive vs Ejecting a Portable HDD

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I am following the CodeProject Tutorial to remove a USB drive in C#. the issue I am facing is the USB Pen Drive eject successfully but doesn't works on a portable hard drive. code is given below

int r = CM_Request_Device_Eject_NoUi(DevInstParent, IntPtr.Zero, null, 0, 0);
LogFile.Err("Eject Return value - " + r);

When a USB pen drive is forced to eject the integer r returns 0 and eject command is successful, but when a portable drive is forced to eject, it returns 23(CR_REMOVE_VETOED). How to tackle this issue?

Posted 21-Aug-15 18:52pm

WiXXeY

Updated 21-Aug-15 19:40pm

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webmaster442 · Answer 1 · 2015-08-22T20:43:00

Solution 1

Maybe that's because your HDD is formatted to NTFS or some application is using files from the harddrive.

Posted 22-Aug-15 20:43pm

webmaster442

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WiXXeY 25-Aug-15 3:47am

I am ejecting it without performing any action on it. Simply as soon as it is inserted, the eject command is issued