Download and install Stellar Data Recovery Professional for Mac. To recover the disk with Stellar Data Recovery Professional, follow the next steps:ġ. The best possible solution apart from getting a backup from Time Machine is using a specific restoring application like Stellar Data Recovery Professional for Mac to revive the information that was stored on SSD. What causes the 'Couldn't Unmount Volume' error The causes of this error are several, starting with the abrupt shutdown and inconsistent file system. Click on Erase and follow the on-screen instructions to finish the process.Īfter you did that you will need to restore your files. Usually, the error 'Couldn't Unmount Disk' shows up when you try to format, partition, verify or repair internal disk by Disk Utility on Mac system. Open Disk Utility from the Recovery Mode again.ģ. If you haven’t done it yet, please proceed with the steps above.ġ. That is why we asked you to prepare your SSD and make a backup of your files. The final possible solution is to erase the SSD and then restore the information stored there. Select the needed SSD → click the First Aid button > choose Run.ĭo not worry if Disk Utility possibly alerts you that a disk is close to failing, you have a backup of your data that you will be able to restore. As far as I know, I didnt see that disk2 in my disk list before. It is the best way to troubleshoot any system glitches preventing removable drives from working correctly on your desktop or Finder.Ģ. Fix couldnt unmount disk 69888 on Mac when erasing or partitioning an external disk. Restart Your MacĪnother quick solution involves restarting your Mac. If you use a USB hub, try different inputs or connect the SSD directly to your computer. Sometimes the problem is simply a defective USB port. So try to unplug your drive from your Mac’s USB port and plug it back in. It sounds obvious and elementary, but you may have accidentally ejected your SSD. How can I get the drive to mount again after unmount: Model: MacBook AppleScript: 2.8. Ways to Solve SSD not Erasing or Mounting on Mac 1. this says - Unable to find disk for /Volumes/MyDrive1/. So if you are having issues with that SSD not erasing/mounting on Mac, then use the guide below to fix the problem. dev/disk0 0: GUIDpartitionscheme 250.1GB disk0 1: EFI EFI 209.7MB disk0s1 2: Apple HFS Macintosh Hard Drive 249.2GB disk0s2 3: AppleBoot Recovery HD 650.0MB disk0s3 /dev/disk1 0: Applepartitionscheme 1.3GB disk1 1: Applepartitonmap 30.7KB. However, drive errors, USB hubs, faulty cables, and other reasons can prevent this from happening. I would imagine this is because I have Recovery open on this disk and that's why it is busy. Ideally, for a couple of minutes, you can solve your problem. The same situation with cleaning the SSD. When you plug an external hard drive or SSD into your Mac, you expect it to mount and show up on your desktop immediately. Ways to Solve SSD not Erasing or Mounting on Mac.In its place would be "disk0s2." It is this indented entry that you want to erase. You might see that it is displayed on the list as: To be sure you do this right, please observe that the drive may appear in the list as ghosted because it is unmounted. Use the device reference in this next command. It will appear similar but not the same as this: /dev/disk0s2. In the output, you should find your Fusion drive listed. At the prompt paste these lines individually pressing RETURN at the end of each line. If that doesn't work then quit Disk Utility and open Terminal from the Utilities' menu. After doing that click on the Unmount button in the toolbar to see if the disk disappears from the Desktop. Try repairing the disk in Disk Utility using First Aid.
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