MAC COULD NOT UNMOUNT FOR REPAIR MAC OS X

I am at a loss for what to do here, and any suggestions are greatly appreciated. The problem is that it for some reasons tries to unmount the partition it has booted from, which is obviously not possible hence, it fails. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. Error: Disk Utility canвЂ™t repair this disk. Next, unmount file system, for example if it is /home (/dev/sda3) file system then type command: umount /home. Take system down to runlevel one (make sure you run all command as root user): init 1.

Volume repair complete.Updating boot support partitions for the volume as required. You cannot repair it while it is running. I have made sure no files are in use, yet I still receive this message when I never have before.ДЄlso, if I attempt to run another repair through Disk Utility once the partitions are unmounted, I see this: This blog presented 5 different methods to troubleshoot вЂexternal hard drive not mountingвЂ™ issue on Mac. To eject the disk immediately, click the Force Eject button. The disk вЂњStorageвЂќ wasnвЂ™t ejected because one or more programs may be using it. mount: / failed with 66 The article provides the top 4 ways to fix the error-The article provides the top 4 ways to fix the error- When the first aid could not unmount the volume for repair, try using the Use.

MAC COULD NOT UNMOUNT FOR REPAIR MAC OS X

If I try to unmount from Finder, I receive this message: Depending on how you went about the work, installing Mac OS X on the new system may give you a message: OS X could not be installed on your computer. When I attempt to run a Disk Utility repair, this occurs: Today, my time machine backups started failing on the device, and eventually I lost access to backups (as well as my music and photos on another partition). I have a Western Digital MyPassport 1TB external hard drive, thatвЂ™s less than 1 year old.

Mac could not unmount for repair