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- Erasing and creating failed could not unmount disk mac os#
- Erasing and creating failed could not unmount disk plus#
This will check the disk for any errors on the disk that can be repaired.ģ. If the disk is visible in Disk Utility but it did not mount, select the disk and click on First-Aid.
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Follow the basic steps of checking whether the disk is properly connected to the system and powered on if required.Ģ. If this does not solve the issue, Disk Utility can become a handy tool to resolve the issue.ġ. The most commonly used resolution to fix the mount issue is to simply restart the system and connecting the disk again to check. Connecting Hardware: The SATA cable or USB through which the disk is connected to the system may be faulty and will prevent the disk from mounting. Power failure: A sudden power disruption may damage the connected disk and cause the storage device being unable to mount successfully on the system again.ĥ. This corrupts the disk permissions, which will later prevent the device from mounting properly.Ĥ.
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Unsafe removal of the disk: The most common reason that damages the disk is removing or ejecting the drive from the system without adequately un-mounting it from the system. Corrupt Disk: The disk or files residing on the drive may be corrupt and are preventing the disk from being accessible on Mac.ģ. If this is not the case, the disk will not be recognized.Ģ.
Erasing and creating failed could not unmount disk mac os#
Incorrect formatting of the disk: The disk that needs to be connected to the Mac system has been formatted in Mac OS Extended (Journaled) format or other Mac supported formats. From the number of possible reasons for this to happen, below listed are a few common issues:ġ. Besides, the Disk Utility may display an error message saying could not mount the disk or may freeze during the mounting process. External Drive Mounting Issues on MacĪfter connecting the external hard drive to the Mac, it may not show up as the connected devices. The later part of the article covers the possible issues with issues that may arise and solutions to fix the same. At times, the drive may be not detected automatically. Select the disk and click on the mount to make it accessible by the operating system. If everything is working fine on the disk, it should be visible on the left-hand-side menu of Disk Utility. Hard drive mounting can be done manually using Disk Utility found under Utilities folder too. Usually, disk mounting is an automatic process and happens when the external hard drive gets connected to Mac via one of the USB ports. Mounting an external disk intends to make the storage device available for macOS to perform read and write operations on it. I'm pretty sure once the file format is set to Journaled that the "sudo chmod o+rw /volumes/Volume_name" will work, but since it only takes a few more seconds for me to set volume permission through macOS I'm just doing it that way.How to mount a drive using Disk Utility on Mac But if I login with a public lab account (which is what is normally logged into my computers) it gives me the error message about being unable to mount.Īm sort of out of ideas at this point, so I'm just going computer by computer, logging in as Admin and erasing the partition. If I login to a computer with an Admin account and then have JSS run the policy, it works. Even though I run the command as sudo, it seems like it runs as the user currently logged in (I tried using the GUI and Disk Utility while logged in as a non-Admin and it did the exact same thing as the script). So I'm ultimately doing this because the file format of a lot of our computers' partitions is Mac OS Extended and I need it to be set to Mac OS Extended (Journaled).ĭid some troubleshooting, it looks like unless the eraseVolume command completes and mounts the drive it doesn't set the file format to Mac OS Extended (Journaled) but instead leaves it as Mac OS Extended (after rebooting when the drive mounts that's what it shows). I get why the 2nd command fails (since it didn't mount it can't change permissions), but does anyone know why the first command would repeatedly fail? I've tried flushing the policy so it would try again in case it was just a fluke, but it continually fails at the same spot (re-mounting).
Erasing and creating failed could not unmount disk plus#
Initialized /dev/rdisk0s4 as a 9 GB case-insensitive HFS Plus volume with a 8192k journalĬhmod: /volumes/Volume_name: No such file or directory However, when I create a script and try to run it through JSS, I get this error: #!/bin/sh If I run these commands separately on terminal on a computer, it works perfectly. Sudo diskutil eraseVolume JHFS+ Volume_name /dev/disk0s4 #erase and reformat Volume_name partition I have a simple script that erases a volume and them sets the permissions so that anyone can access the drive: #!/bin/sh