I am at a loss as to what happened and how to format my USB key. The permissions on the USB key are set to "Read & Write". I tried to format it to FAT32 on the PC however it would not let me simply coming up with "Error". I then booted up Mac OS X from the original install disk and did the same but recieved the same error.įinally, I put the USB key into a Windows PC, it mounted fine and would unmount fine. If you get a message saying Could not unmount disk, some other process is using (or trying to use) the disk: If youre running any anti-virus software. To eject the disk immediately, click the Force Eject button.Ī re-partition, full erase or repair using Disk Utility but it can not and I get the following error: Could not unmount disk. I can not eject the USB key and I get the following error: The disk "#" wasn't ejected because one or more programs may be using it. Fix 1: Erase Disk via Terminal Fix 2: Update the macOS Fix 3: Erase Selected Volumes Instead Fix 4: Adjust the Security Levels for Formatting an External. I can not delete from the USB key and I get the following error: The operation can’t be completed because an unexpected error occurred (error code -50). Hi Ravins, So let me understand this correctly. You can also try the umount command with âl option on a. My phone brokenout nd I could not unmount my ad card properly but now when I am using it in different phone it shows blank sd card and ask me to format, it is not readable at computer also, plz provide me the way to save the content of sd card. Hey guys, i'm trying to format a spare external, it's currently formatted to ms-dos for back up dutys on my PS3 but i want to change it to mac os extended i've just plugged the drive in ( USB ), nothings running on it, or open on the computer from the drive, but disk utility wont erase it, i've checked permission and everythings fine but it. Linux umount command to unmount a disk partition. m : Name specifies a file on a mounted file system or a block device that is mounted. Where, -k : Kill processes accessing the file. I can not write to the USB key and I get the following error: The operation can’t be completed because an unexpected error occurred (error code -50). Type the command to unmount /mnt forcefully: fuser -km /mnt. It was working perfectly until this morning. I have a Lacie CooKey 16gb USB key, 1 Partition as GUILD Partition Map.
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