I have mounted an external disk connected to an ASUS router, which implements a Samba server. Everything works just fine except one annoying thing: creating a directory with mkdir returns an error message, even though the directory is indeed created.
The relevant line in /etc/fstab looks like this:
//192.168.1.1/data /media/external/data cifs username=data,password=data,vers=2.0,uid=1000,gid=1000 0 0
When mounting the disk, everything is ok. (The directory stackoverflow is located on the external disk.)
daniel@nuc:/media/external$ ll
total 12
drwxr-xr-x 5 root root 4096 mar 23 21:05 ./
drwxr-xr-x 4 root root 4096 mar 10 15:25 ../
drwxr-xr-x 2 daniel daniel 4096 mar 24 10:50 data/
daniel@nuc:/media/external$ sudo mount -a
daniel@nuc:/media/external$ cd data
daniel@nuc:/media/external/data$ ll
total 4
drwxr-xr-x 2 daniel daniel 0 mar 24 10:54 ./
drwxr-xr-x 5 root root 4096 mar 23 21:05 ../
drwxr-xr-x 2 daniel daniel 0 mar 14 23:07 stackoverflow/
daniel@nuc:/media/external/data$
When creating the directory test, an error message is shown.
daniel@nuc:/media/external/data$ mkdir test
mkdir: cannot create directory ‘test’: Not a directory
However, the directory is created!
daniel@nuc:/media/external/data$ ll
total 4
drwxr-xr-x 2 daniel daniel 0 mar 24 11:01 ./
drwxr-xr-x 5 root root 4096 mar 23 21:05 ../
drwxr-xr-x 2 daniel daniel 0 mar 14 23:07 stackoverflow/
drwxr-xr-x 2 daniel daniel 0 mar 24 11:01 test/
When removing the directory and recreating it with the -p flag, the error message does not show up.
daniel@nuc:/media/external/data$ rmdir test
daniel@nuc:/media/external/data$ ll
total 4
drwxr-xr-x 2 daniel daniel 0 mar 24 11:01 ./
drwxr-xr-x 5 root root 4096 mar 23 21:05 ../
drwxr-xr-x 2 daniel daniel 0 mar 14 23:07 stackoverflow/
daniel@nuc:/media/external/data$ mkdir -p test
daniel@nuc:/media/external/data$ ll
total 4
drwxr-xr-x 2 daniel daniel 0 mar 24 11:01 ./
drwxr-xr-x 5 root root 4096 mar 23 21:05 ../
drwxr-xr-x 2 daniel daniel 0 mar 14 23:07 stackoverflow/
drwxr-xr-x 2 daniel daniel 0 mar 24 11:01 test/
daniel@nuc:/media/external/data$
This makes me wonder if the problem is that mkdir does not "see" the mounted directory for some reason and spits out an error message just as if you would try to created a sub-directory within an non-existing directory.
But why is this? What can I do to fix it?
(I will add that when mounting with vers=1.0, the mkdir error does not show. However, file_mode and dir_mode then appear to be ignored, and I need them to be set to 0700 in another application.)
Update: When the disk is connected to the USB port of the computer and ntfs mounted everything works nicely.
Update: Output from strace mkdir test
execve("/bin/mkdir", ["mkdir", "test"], 0x7ffdb3669768 /* 67 vars */) = 0
brk(NULL) = 0x561761838000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=158495, ...}) = 0
mmap(NULL, 158495, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f782b715000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20b\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=154832, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f782b713000
mmap(NULL, 2259152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f782b2ed000
mprotect(0x7f782b312000, 2093056, PROT_NONE) = 0
mmap(0x7f782b511000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0x7f782b511000
mmap(0x7f782b513000, 6352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f782b513000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2030544, ...}) = 0
mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f782aefc000
mprotect(0x7f782b0e3000, 2097152, PROT_NONE) = 0
mmap(0x7f782b2e3000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f782b2e3000
mmap(0x7f782b2e9000, 15072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f782b2e9000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpcre.so.3", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=464824, ...}) = 0
mmap(NULL, 2560264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f782ac8a000
mprotect(0x7f782acfa000, 2097152, PROT_NONE) = 0
mmap(0x7f782aefa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x70000) = 0x7f782aefa000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14560, ...}) = 0
mmap(NULL, 2109712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f782aa86000
mprotect(0x7f782aa89000, 2093056, PROT_NONE) = 0
mmap(0x7f782ac88000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f782ac88000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000b\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=144976, ...}) = 0
mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f782a867000
mprotect(0x7f782a881000, 2093056, PROT_NONE) = 0
mmap(0x7f782aa80000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f782aa80000
mmap(0x7f782aa82000, 13440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f782aa82000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f782b711000
arch_prctl(ARCH_SET_FS, 0x7f782b712040) = 0
mprotect(0x7f782b2e3000, 16384, PROT_READ) = 0
mprotect(0x7f782aa80000, 4096, PROT_READ) = 0
mprotect(0x7f782ac88000, 4096, PROT_READ) = 0
mprotect(0x7f782aefa000, 4096, PROT_READ) = 0
mprotect(0x7f782b511000, 4096, PROT_READ) = 0
mprotect(0x56175ffd9000, 4096, PROT_READ) = 0
mprotect(0x7f782b73c000, 4096, PROT_READ) = 0
munmap(0x7f782b715000, 158495) = 0
set_tid_address(0x7f782b712310) = 7736
set_robust_list(0x7f782b712320, 24) = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7f782a86ccb0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f782a879890}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7f782a86cd50, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f782a879890}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
statfs("/sys/fs/selinux", 0x7fff4f557960) = -1 ENOENT (No such file or directory)
statfs("/selinux", 0x7fff4f557960) = -1 ENOENT (No such file or directory)
brk(NULL) = 0x561761838000
brk(0x561761859000) = 0x561761859000
openat(AT_FDCWD, "/proc/filesystems", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 420
read(3, "", 1024) = 0
close(3) = 0
access("/etc/selinux/config", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=11861168, ...}) = 0
mmap(NULL, 11861168, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7829d17000
close(3) = 0
mkdir("test", 0777) = -1 ENOTDIR (Not a directory)
openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2995, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2995
read(3, "", 4096) = 0
close(3) = 0
openat(AT_FDCWD, "/usr/share/locale/en_US.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=578, ...}) = 0
mmap(NULL, 578, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f782b73b000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/charset.alias", O_RDONLY|O_NOFOLLOW) = -1 ENOENT (No such file or directory)
write(2, "mkdir: ", 7mkdir: ) = 7
write(2, "cannot create directory \342\200\230test\342"..., 34cannot create directory ‘test’) = 34
openat(AT_FDCWD, "/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, ": Not a directory", 17: Not a directory) = 17
write(2, "\n", 1
) = 1
close(1) = 0
close(2) = 0
exit_group(1) = ?
+++ exited with 1 +++
Update on request, the smb.conf file from the ASUS router (somewhat tidied, relevant parts kept):
[global]
workgroup = WORKGROUP
netbios name = RT-AC68U-AC48
server string = RT-AC68U-AC48
unix charset = UTF8
display charset = UTF8
load printers = no
printing = bsd
printcap name = /dev/null
log file = /var/log.samba
log level = 0
max log size = 5
security = USER
guest ok = no
map to guest = Bad User
encrypt passwords = yes
pam password change = no
null passwords = yes
force directory mode = 0777
force create mode = 0777
max connections = 5
socket options = IPTOS_LOWDELAY TCP_NODELAY SO_KEEPALIVE
obey pam restrictions = no
disable spoolss = yes
host msdfs = no
strict allocate = no
wide links = no
bind interfaces only = yes
interfaces = lo br0 192.168.1.1/255.255.255.0
use sendfile = yes
map archive = no
map hidden = no
map read only = no
map system = no
store dos attributes = yes
dos filemode = yes
oplocks = yes
level2 oplocks = yes
kernel oplocks = no
enable core files = no
deadtime = 30
load printers = no
printable = no
max protocol = SMB2
min protocol = SMB2
smb encrypt = disabled
min receivefile size = 16384
passdb backend = smbpasswd
smb passwd file = /etc/samba/smbpasswd
[data]
comment = Seagate_3TB's data in Seagate Backup+ Desk
path = /tmp/mnt/Seagate_3TB/data
dos filetimes = yes
fake directory create times = yes
valid users = data, backup
invalid users = backup
read list = data
write list = data
Creating the directory when ssh'd onto the router works as expected (perhaps not very surprising):
daniel@RT-AC68U-AC48:/tmp/mnt/Seagate_3TB/data# ll
drwxrwxrwx 1 daniel root 0 Mar 15 00:07 stackoverflow/
daniel@RT-AC68U-AC48:/tmp/mnt/Seagate_3TB/data# mkdir test
daniel@RT-AC68U-AC48:/tmp/mnt/Seagate_3TB/data# ll
drwxrwxrwx 1 daniel root 0 Mar 15 00:07 stackoverflow/
drwxrwxrwx 1 daniel root 0 Apr 3 21:46 test/
This could be a dying hard-drive/SSD that
mkdiris failing to write to.Since this is an external drive. Does it have a read-write lock on?
It could be mounted as read-only instead of read+write.
Use:
sudo mount -o remount,rw /partition/identifier /mount/pointto re-mount as read+write. Source: https://askubuntu.com/a/175742/886917.