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On Linux systems, DriveInfo.DriveFormat now returns Linux kernel filesystem type strings. These strings represent a more granular representation of the filesystem type than the previous implementation. For example, it's now possible to distinguish between ext3 and ext4.
Previous behavior
Previously, .NET returned a string representation by mapping magic constants to strings. Because several different filesystem types use the same magic constants, it wasn't possible to distinguish between them.
For cgroup file systems, DriveFormat returned cgroupfs/cgroup2fs. For the SELinux filesystem, the value was selinux.
New behavior
Starting in .NET 10, .NET returns the string representation used by the Linux kernel for the filesystem type.
For cgroup file systems, DriveFormat returns cgroup/cgroup2. For the SELinux filesystem, the value is selinuxfs.
Version introduced
.NET 10 Preview 6
Type of breaking change
This change is a behavioral change.
Reason for change
Provide more granular filesystem type information.
Recommended action
Check and update usages of DriveInfo.DriveFormat to include the Linux filesystem type strings. On a Linux system, you can read the type strings of the drives from the /proc/self/mountinfo file. On each line, the filesystem type string is the first field after the - separator.
Affected APIs
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