Use strace, everything seems ok. Mount command reads the /etc/filesystems and tries one by one unitl ntfs-3g is executed with more "noise"...
root@formuler1:~# opkg install strace
Package strace (4.9-r0.9) installed in root is up to date.
root@formuler1:~# strace mount /sr0 /media/test
execve("/bin/mount", ["mount", "/sr0", "/media/test"], [/* 12 vars */]) = 0
brk(0) = 0x4bf000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77533000
uname({sys="Linux", node="formuler1", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=10245, ...}) = 0
mmap(NULL, 10245, PROT_READ, MAP_PRIVATE, 3, 0) = 0x77530000
close(3) = 0
open("/lib/libcrypt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\240\t\0\0004\0\0\0"..., 512) = 512
lseek(3, 620, SEEK_SET) = 620
read(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\2\0\0\0\6\0\0\0 \0\0\0", 32) = 32
fstat64(3, {st_mode=S_IFREG|0755, st_size=39860, ...}) = 0
mmap(NULL, 262716, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x774c2000
mprotect(0x774cb000, 61440, PROT_NONE) = 0
mmap(0x774da000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x774da000
mmap(0x774dc000, 156220, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x774dc000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0D\225\1\0004\0\0\0"..., 512) = 512
lseek(3, 700, SEEK_SET) = 700
read(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\2\0\0\0\6\0\0\0 \0\0\0", 32) = 32
fstat64(3, {st_mode=S_IFREG|0755, st_size=1537564, ...}) = 0
mmap(NULL, 1515440, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x77350000
mprotect(0x774aa000, 65536, PROT_NONE) = 0
mmap(0x774ba000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15a000) = 0x774ba000
mmap(0x774c0000, 8112, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x774c0000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7752f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7752e000
set_thread_area(0x77536920) = 0
mprotect(0x774ba000, 12288, PROT_READ) = 0
mprotect(0x774da000, 4096, PROT_READ) = 0
mprotect(0x77534000, 4096, PROT_READ) = 0
munmap(0x77530000, 10245) = 0
getuid() = 0
brk(0) = 0x4bf000
brk(0x4e0000) = 0x4e0000
getuid() = 0
geteuid() = 0
stat64("/sr0", 0x7fc11268) = -1 ENOENT (No such file or directory)
open("/etc/filesystems", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=40, ...}) = 0
mmap(NULL, 65536, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77340000
read(3, "ext4\next3\next2\nvfat\nfat\nbtrfs\nnt"..., 4096) = 40
read(3, "", 4096) = 0
open("/proc/filesystems", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 65536, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77330000
read(4, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 324
read(4, "", 1024) = 0
mount("/sr0", "/media/test", "ext4", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19603
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19603, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19603, NULL, 0) = 19603
mount("/sr0", "/media/test", "ext3", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19604
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19604, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19604, NULL, 0) = 19604
mount("/sr0", "/media/test", "ext2", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19605
waitpid(19605, NULL, 0) = 19605
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19605, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
mount("/sr0", "/media/test", "vfat", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19606
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19606, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19606, NULL, 0) = 19606
mount("/sr0", "/media/test", "fat", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19607
waitpid(19607, NULL, 0) = 19607
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19607, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
mount("/sr0", "/media/test", "btrfs", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19608
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19608, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19608, NULL, 0) = 19608
mount("/sr0", "/media/test", "ntfs-3g", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19609
waitpid(19609, ntfs-3g: Failed to access volume '/sr0': No such file or directory
ntfs-3g 2013.1.13 integrated FUSE 27 - Third Generation NTFS Driver
Configuration type 1, XATTRS are on, POSIX ACLS are off
Copyright (C) 2005-2007 Yura Pakhuchiy
Copyright (C) 2006-2009 Szabolcs Szakacsits
Copyright (C) 2007-2012 Jean-Pierre Andre
Copyright (C) 2009 Erik Larsson
Usage: ntfs-3g [-o option[,...]] <device|image_file> <mount_point>
Options: ro (read-only mount), windows_names, uid=, gid=,
umask=, fmask=, dmask=, streams_interface=.
Please see the details in the manual (type: man ntfs-3g).
Example: ntfs-3g /dev/sda1 /mnt/windows
News, support and information: http://tuxera.com
[{WIFEXITED(s) && WEXITSTATUS(s) == 11}], 0) = 19609
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19609, si_uid=0, si_status=11, si_utime=0, si_stime=0} ---
mount("/sr0", "/media/test", "ext4", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19610
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19610, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19610, NULL, 0) = 19610
mount("/sr0", "/media/test", "vfat", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19611
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19611, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19611, NULL, 0) = 19611
mount("/sr0", "/media/test", "msdos", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19612
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19612, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19612, NULL, 0) = 19612
mount("/sr0", "/media/test", "iso9660", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19613
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19613, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19613, NULL, 0) = 19613
mount("/sr0", "/media/test", "hfsplus", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19614
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19614, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19614, NULL, 0) = 19614
mount("/sr0", "/media/test", "hfs", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19615
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19615, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19615, NULL, 0) = 19615
mount("/sr0", "/media/test", "fuseblk", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19616
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19616, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19616, NULL, 0) = 19616
mount("/sr0", "/media/test", "udf", MS_SILENT, NULL) = -1 ENOENT (No such file or directory)
clone(child_stack=0x7fc11198, flags=CLONE_VM|CLONE_VFORK|SIGCHLD) = 19617
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19617, si_uid=0, si_status=111, si_utime=0, si_stime=0} ---
waitpid(19617, NULL, 0) = 19617
write(2, "mount: mounting /sr0 on /media/t"..., 70mount: mounting /sr0 on /media/test failed: No such file or directory
) = 70
exit_group(-1) = ?
+++ exited with 255 +++
Wavefield T90: 0.8W - 1.9E - 4.8E - 13E - 16E - 19.2E - 23.5E - 26E - 33E - 39E - 42E - 45E on EMP Centauri DiseqC 16/1
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