The notifications can be disabled only by modifying the registry - but even then, the notifications cannot be selectively turned off. There's no way to selectively disable this warning for individual partitions. Because the partition is very full, Windows 10 continuously notifies you that D: is low on disk space: In this scenario, you know you won't need to make another backup for a few weeks, so nothing on the volume needs to change before then. That's OK, because the backups it contains are complete and up-to-date. The D: drive is 100% full - it has no more free space. You can view how much free space you have on your mounted volumes if you open File Explorer (press Win + E), and choose This PC. D:, which contains automatically created backups of critical files in C:.C:, which contains the operating system and all user programs and documents.The drive contains two NTFS partitions, mounted as Windows volumes:

In this scenario, you have a single HDD inside a laptop computer.

Example scenario: secondary volume is full While unmounted, the volume's file system is inaccessible by regular reads and writes. When a volume is unmounted, its drive letter is unassigned and may be used by another storage device. The following example is performed using Windows 10, but these instructions should also work for Windows 8.1, Windows 7, and Windows XP. Let's look at a scenario where this operation can be useful, and how it can be done. The process of changing a drive from mounted to not mounted is called unmounting. When a volume is not mounted, its data cannot be accessed or altered by conventional means. You may have a DVD drive mounted at D: or E:, and perhaps a secondary HDD or SSD mounted at a letter as well.Īnything 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. For instance, you probably have a partition on your HDD or SSD mounted to the C: drive letter, which contains your Windows operating system. In Windows, volumes are mounted as drive letters and include drive partitions, removable disks, optical drives, external hard drives, and network drives.

Example scenario: secondary volume is full.

What happens when a volume is unmounted?.

Partition failed could not unmount disk