-f Specifies that the filesystem image to be processed is stored in a regular file at device (see
the mkfs.xfs-dfile option). This might happen if an image copy of a filesystem has been made
into an ordinary file.
-llogdev
Specifies the device where the filesystem's external log resides. Only for those filesystems
which use an external log. See the mkfs.xfs-l option, and refer to xfs(5) for a detailed
description of the XFS log.
-s Limits the report to special files and files with setuserid mode. This option may be used to
detect violations of security policy.
-iino Limits the report to only those files whose inode numbers follow. May be given multiple times
to select multiple inode numbers.
-V Prints the version number and exits.
If the filesystem is seriously corrupted, or very busy and looks like it is corrupt, a message of the
form that would be generated by the xfs_db(8) "check" command may appear.
xfs_ncheck is only useful with XFS filesystems.