Interface MountPoint

If there are non-critical errors while extracting metadata, those errors may be added to this field.

The type of file system on the volume, like ext4, apfs, or ntfs.

Note: on Windows this may show as "ntfs" for remote filesystems, as that is how the filesystem is presented to the OS.

Whether the volume is mounted read-only.

Examples of read-only volumes include the macOS APFS system snapshot at /, mounted ISO images, and write-protected media.

Note that the macOS root volume (/) UUID changes on every OS update, so consumers should avoid using it for persistent identification.

Indicates if this volume is primarily for system use (e.g., swap, snap loopbacks, EFI boot, or only system directories).

On macOS, the sealed APFS system snapshot at / is detected natively via MNT_SNAPSHOT; other infrastructure volumes under /System/Volumes/* are detected via APFS volume roles (IOKit). Note that /System/Volumes/Data is not a system volume — it holds all user data, accessed via firmlinks.

Mount location (like "/" or "C:").

On Windows, returns the health status of the volume.

Note that this is only available on Windows, as both Linux and macOS are prohibitively expensive, requiring forking fsck -N or diskutil verifyVolume.

If there are non-critical errors while extracting metadata, those error messages may be added to this field (say, from blkid or gio).

The APFS volume role, if available. Only present on macOS for APFS volumes.

Common roles: "System", "Data", "VM", "Preboot", "Recovery", "Update", "Hardware", "xART", "Prelogin", "Backup".

Used for system volume detection: volumes with a non-"Data" role and MNT_DONTBROWSE are classified as system volumes.