Backup

[ryem1340]

Hi All,

This query is regarding the Local Scheduled backup. We are trying to mount a network drive and use that as a repository.
SMBv1 is turned off on our storage and when we try to manually mount the network drive using mount.cifs it defaults to use SMBv1. We tried to force it to use by using the option vers=2.1 but no luck.

Any suggestions on how we can force it to use the later versions of SMBv2 or above.

Nagios XI- 5.7.1
Centos 6.8 (Final)
Kernel: 2.6.32-642.6.2.el6.x86_64 #1 SMP Wed Oct 26 06:52:09 UTC 2016

Thanks in advance.

[jdunitz]

Do you get any kind of error when you try to specify the protocol version?
What version of cifs-utils do you have installed?

--Jeffrey

[ryem1340]

When I try to mount the drive using Vers=2.1 or above as an option. It gives an output that the there is an I/O error.
The verbose message shows that it by default uses ver=1 in the option.

cifs-utils - cifs-utils-4.8.1-20.el6.x86_64. Thats the latest one available for Centos 6.8 I believe.

[ssax]

If you change Vers=2.1 to vers=2.1 (lowercase), does it work?

Please post the full sanitized command with verbose output turned on and we'll take a look.

[ryem1340]

Command I am using :

mount --verbos -t cifs //server/share/ /mountname --verbose -o vers=2.1,username=username,domain=domainname,sec=ntlm

Displays : final mount options: 'ver=2.1,username=username,domain=domain,sec=ntlm'
Prompts for the password : Enters the password

Output:

mount.cifs kernel mount options: ip=ipaddress,unc=\\server\share$,vers=2.1,sec=ntlm,ver=1,user=username,domain=domainname,pass=********
mount error(5): Input/output error
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

On the output it shows that it uses ver=1 also. Not sure if i am doing this wrong

[ssax]

Is it already mounted? Unmount it first:

Code: Select all

mount | grep /mountname
umount /mountname

Just for testing, does it work if you put the password in there?

Code: Select all

mount --verbose -t cifs //server/share/ /mountname  -o username=username,domain=corpdom,password=XXXXXXXX,sec=ntlm

[ryem1340]

We have removed the mount earlier before trying to re mount it.
Just tried the Syntax mentioned by including the password but it throws the same error.

[mbellerue]

Rather than sec=ntlm, try sec=ntlmv2, or just omitting the sec option and let CIFS try to figure it out.

[ryem1340]

Rather than sec=ntlm, try sec=ntlmv2, or just omitting the sec option and let CIFS try to figure it out.

We have tried that already. Tried various options. Looks like the CentOS 6.X might not support SMB Version 2 or above. Not sure.

[ssax]

That may be the case:

Basic support for SMB 2.1 was added in kernel version 3.07

Taken from here:

https://wiki.samba.org/index.php/SMB3_kernel_status

What kernel are you running?

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uname -a

What version of samba are you running?

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rpm -qa | grep samba

This seems to indicate that samba4 may support it:

https://wiki.samba.org/index.php/Samba3/SMB2#SMB_2.1