HelenOS sources

fs_minix          477 uspace/lib/device/src/vol.c 	case fs_minix:
fs_minix          978 uspace/lib/fdisk/src/fdisk.c 	case fs_minix:
fs_minix          117 uspace/srv/volsrv/mkfs.c 	case fs_minix:
fs_minix          154 uspace/srv/volsrv/mkfs.c 	case fs_minix:
fs_minix           71 uspace/srv/volsrv/part.c 	{ "mfs", fs_minix },
HelenOS homepage, sources at GitHub