Task — access ext4 partitions from windows.
Problem — colinux is a fairly old kernel(220.127.116.11). It has the module ext4dev, but... only mounted file system for which there is a marked test_fs. Mark installs easily — tune2fs -E test_fs /dev/*** and everything works — until the next start of the linux which FS not mounted as a test and a mark is automatically removed when the fsck.
Yes, of course, you can just mount the FS, not via fstab and a script which pre-make tune2fs, but it looks like some kind of crutch. I would like the "right" decision.