Question

Do you know you to unmount a drive without ejecting it. NSWorkspace has some methods to unmount drives but it also eject them.

Any idea ?

Answer 1

I am doing it as follows and it un-mounts the drive but doesn’t eject it.

(Actually I want to eject the disk, I can only un-mount the disk. 😛 Please share how to eject a disk.)

DASessionRef session = DASessionCreate(kCFAllocatorDefault);

CFURLRef path = CFURLCreateWithString(NULL, CFSTR("<path_to_your_volume_here>"), NULL);
DADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, session, path);

DADiskUnmount(disk, kDADiskUnmountOptionDefault, __unmountCallback, NULL);

This is the code I am still working on and is under development and testing.
I am creating the “path” manually. You can use (and share) a better method to get the path of volume in a generic way. Perhaps this answer has hints of doing it the right way.

I’ll update when my development is refined and complete.