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#VOLUME ERASE FAILED WITH ERROR COULD NOT UNMOUNT DISK UPDATE#
Mds 73 root 20r DIR 1,6 340 2 /Volumes/Install macOS High Sierra mds 73 root 23r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root twd DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 20r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 22r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 34u REG 1,6 28 33 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 36r REG 1,6 118784 58 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 40u REG 1,6 118784 59 /Volumes/Install macOS High Sierra/. Update The rebuild using the 'failed' drive in bay 2 was successful I then proceeded to put the bay 2 drive into bay 1 and was able to expand the array onto that. Lsof | grep /Volumes/'Install macOS High Sierra' Unmount of disk1 failed: at least one volume could not be unmounted Sudo dd if=/dev/zero of=/dev/disk1 bs=10000000ĭisk1 was already unmounted or it has a partitioning scheme so use "diskutil unmountDisk" instead Started erase on disk1 Unmounting disk Error: -69888: Couldn't unmount disk Once this pops up, the current process gets halted and could no longer proceed, affecting any troubleshooting process or disk repair you might be doing. Volume Erase failed Volume Erase failed with the error: Couldn’t Unmount Disk. Sudo diskutil eraseDisk JHFS+ Lexar disk1 Disk Utility stopped verifying (letter of the hard disk) Couldn’t Unmount Disk. Using the Terminal app with the following commands: Using Disk Utility app, but it does not see the USB or just keeps spinning. Would you have any suggestions or ideas? Also, I don't understand what PID 0 is doing to prevent me from erasing the USB.
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Now that I’m done with it, I cannot erase it. I created a bootable USB with High Sierra on it.