Within Settings tap the Storage button. If you can't eject the external hard drive, you can reboot or turn off your computer, and this will close all programs and processes to make sure no programs are using the files on the external hard drive.
After your computer restarts or turns off, you can try to eject the external hard drive. Simply mounting will not erase everything. However, since you have serious directory corruption which cannot be repaired by Disk Utility you need to repair and replace the directory before it can be mounted.
Of course, in order for a disk to be unmounted, it must first be mounted. When a disk is mounted, it is active and the computer can access its contents. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore.
This option allows a "busy" filesystem to be unmounted. To perform operations on the filesystem that would be unsafe to do while mounted. The blkid command is available by default on most modern Linux distributions. If you want to take one of your drives offline, you can unmount it. In Windows, mounting and unmounting a volume is accomplished by changing the volume's drive letter assignment.
In Windows, volumes are mounted as drive letters and include drive partitions , removable disks , optical drives , external hard drives , and network drives. Anything with a drive letter is " mounted ": the operating system has made the volume's filesystem available for reading and writing by the user programs and operating system.
When a volume is not mounted, its data cannot be accessed or altered by conventional means. The process of changing a drive from mounted to not mounted is called unmounting. Let's look at a scenario where this operation can be useful, and how it can be done. The following example is performed using Windows 10, but these instructions should also work for Windows 8.
When this happens to me I boot into the Recovery HD to repair the disk. Nov 13, AM in response to elliswicks In response to elliswicks. I have a 1 TB Iomega drive that I need to repair every so often.
It's okay as long as I can resume the back ups without having to start a "New" backup. A new backup then becomes aggrevating to have to do. Nov 13, AM. If you run into trouble after repairing the Disk with TM trying to do a full new backup, try James Pond's method of doing a Total Reset. This has got TM back doing incremental back ups vs a new backup. Page content loaded. Nov 27, AM in response to elliswicks In response to elliswicks. Hi Joe, I've tried both of these and I seem to still be having the same problem.
After the Time Machine has done a few backups and seems fine, it "corrupts" and has to be completely wiped and start all over! This is becoming annoying as I have to do a full erase and full Time Machine backup of the drive every time it does this. Nov 27, AM. Do you have any other external drives plugged into daisy chained your Time Machine disk. The reason I ask is I've found out what my problem is when TM says it's not able to do a backup. I have another external drive plugged into my TM disk.
Whenever I unmount the second drive, my next TM backup will not complete. Below from Seagate:. Unmounting a drive is the same thing as ejecting a drive. You cannot unmount your computer's main hard drive e. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great.
By using our site, you agree to our cookie policy. Cookie Settings. Learn why people trust wikiHow. Download Article Explore this Article methods. Tips and Warnings. Related Articles. Method 1. Open the Start menu. Open File Explorer. The option will be listed in the left pane. The names differ among Windows versions.
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