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I am trying to mount a smb share on my embedded Linux running on ARM (3.6.9) with busybox 1.21

mount -t cifs //192.168.0.12/mydata /mnt/myData 

results in an invalid argument error:

mount: mounting /192.168.0.12/mydata/ on /mnt/myData failed: Invalid argument

CIFS support is definetly installed and the directories exist. Is there any syntax difference in busybox's mount command? Thank in advance!

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Can you please give the exact error message? And where is the user option mentioned in the question title in your command? Oh, and where do you give the username/password for this share? –  mpy Jun 24 '13 at 7:12
    
Sorry, I messed up. Wrote the title when I still had a different error message. –  tzippy Jun 24 '13 at 7:16
    
With busybox v1.1.3 this command succeeds: mount -t cifs //192.168.1.11/Files /mnt/files -o username=windows_user,password=windows_pwd, so obviously no general problem. Does the mount command with increased verbosity -vvv give some more hints? –  mpy Jun 24 '13 at 19:16
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Just double checking that CIFS support is installed, does the file /sbin/mount.cifs exist? –  Cristian Ciupitu Jun 29 '14 at 0:08

3 Answers 3

The clue is in the output:

mount: mounting /192.168.0.12/mydata/ on /mnt/myData failed: Invalid argument

Shares are not referenced starting with a single /.

For CIFS shares you need to use backslashes. You then need to double up these to escape them, otherwise the shell thinks they have a special meaning.

Try:

mount -t cifs \\\\192.168.0.12\\mydata /mnt/myData
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In order to mount CIFS volumes, the mount command needs to prepare a bit of extra information for the kernel, which is why you have to use a special mount.cifs command for that. The regular mount command will automatically defer to that as long as it is installed, so you don't normally see that.

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Just put some quotes around the directory to escape the slashes. Also handy if there are spaces in directory names.

mount -t cifs '//192.168.1.123/Mateo Disk'  /dev/myData -o username=alison,password=monkey
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Slash / is not a special character for shell. It does not need to be escaped. (Space is a special character.) –  pabouk May 31 at 9:31

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