Ramiro, If I recall correctly, I formatted my ext2 disk with FreeBSD and read it with Linux and NetBSD... I specifically used it directly and not with FUSE on NetBSD. I also had a data drive formatted to ext3 from years ago, and couldn't tell you what Linux I used back then, but it was probably Fedora-based. I was able to read that but it was noted that I shouldn't try writing it since journaling and stuff wasn't available in NetBSD. I did not risk much there, because that was like my life's data collection. I have no significant experience to say "you should absolutely use xyz OS to format", so far as I have seen, with basic user usage of a FS, most systems seem to handle the basic stuff like CRUD correctly. My recommendation with no basis and bias would be, pick the system you know is going to have the most widely supported maintained tool to format/repair/recover the filesystem. So I'd expect Linux to be the best choice to use to format the disk. I'd be careful around partitioning though. I know with some USB disks and SD cards, MBR versus GPT schemes make a difference in whether Windows and Mac OS can read FAT systems correctly. I'm not sure how that stuff affects ext2 reliability...
Cheers.
