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WARNING: probably missed some lines here !!!!! HelenOS release 0.14.1 (Aladar), revision 286653131 Built on 2026-04-25 01:22:44 Running on amd64 (terminal/59) Copyright (c) 2001-2026 HelenOS project Welcome to HelenOS! https://www.helenos.org/ Type 'help' [Enter] to see a few survival tips. / # mkfile --size 2m /tmp/img / # ls -e /tmp img 2097152 / # /srv/bd/file_bd /tmp/img fbd0 file_bd: File-backed block device driver file_bd: Accepting connections / # mkfat --type 12 fbd0 Device: fbd0 mkfat: Block device has 4096 blocks. mkfat: Creating FAT filesystem on device fbd0. mkfat: Filesystem type FAT12. Writing allocation table 1. Writing allocation table 2. Writing root directory. Success. / # mkdir /tmp/mnt / # mount fat /tmp/mnt fbd0 / # cp demo.txt /tmp/mnt / # ls /tmp/mnt demo.txt 592 B / # umount /tmp/mnt / # ls /tmp/mnt / # mount fat /tmp/mnt fbd0 / # ls /tmp/mnt demo.txt 592 B / # _