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/ 1 Answer
This could be a dying hard-drive/SSD that mkdir is 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/point to re-mount as read+write. Source: .
