Random CIFS/SMB drop outs

[Slackness]

As per the title:

I get random dropouts via cabled 1Gb ethernet with CIFS/SMB on MAC, Linux & Windows.

No, scheduled reboots, Only plex running, have FTP enabled but not used much.
This is about as minimal as you can get on the unit.

The unit is a TS653A with 6 WD Drives.

Unit --> HP Procurve 1GB switch --> HP DL380 Vers 7 running VMWare
--> Draytek WIFI router with 1Gb connection.

No errors on the managed switch to show packet dropout.

Mix of MACs, Linux, Android and Windows clients.

Any help appreciated.

Current firmware version:4.3.3.0154

Thanks

Slackness.

[schumaku]

Can you describe the "random dropouts" a little bit better please?

What is the max SMB protocol configured on your NAS? Check either the WIn/Mac/NFS section -> Windows Networking -> Advanced, or run # smb2status

[~] # smb2status

smbd (samba daemon) Version 4.4.9
smbd (samba daemon) is running.
max protocol SMB 3.0 enabled.

Any port trunking, Jumbo Frames or the like in the game?

[be!bob]

I have a similar problem to others in the forums. The problem is that a samba share from my QNAP nas becomes inaccessible after some random period of time. I have read a number of forum posts on this topic (both on the linux side and the QNAP side), but they don't seem to match.

Here are the details:
QNAP TS-453 Pro, recent upgrade to 4.3.3.0154

Client:
Ubuntu 16.04
cifs version 6.4

There are 5 shares that are mounted automatically in fstab. They have all worked for over 2 years without issue. The issues described below only started after the NAS was updated to firmware 4.3.3.0154 from 4.1.something. Here is the fstab line for the one of the shares:

Code: Select all

//192.168.1.80/CBE_Admin /media/bob/CBE_Admin cifs _netdev,iocharset=utf8,credentials=/home/bob/.smbcredentials,uid=1000,vers=3.0 0 

The issue:
Intermittently, one or more of the mount points from the one NAS are unavailable. The error occurs when trying to access the share. For example, ls on the share returns:

Code: Select all

ls: cannot access '/media/bob/CBE_Admin': Host is down

Interestingly, one or more of the 5 shares are still available and can be accessed without issue. I have not had all five shares down at the same time.
If I leave everything alone, after some random period of time, the share may become accessible again. It seems to be random.

I have not been able to find anything out of the sorts in any of the logs on the ubuntu box.

Based on previous posts from Kurt, I have verified the following on the NAS:

Code: Select all

[~] # smb2status

smbd (samba daemon) Version 4.4.9
smbd (samba daemon) is running.
max protocol SMB 3.0 enabled.

I'm not sure what is going on here.

I can "fix" the problem by rebooting the ubuntu machine or by unmounting and remounting the share as root.

Any help would be appreciated.

[schumaku]

Ensure you update the NAS to QTS 4.3.3.0174 (available from the manual download in case - qnap.com -> Support -> Download.

Regards,
-Kurt

[Syl20_0]

Hi,

Did you look at /etc/config/smb.conf ?
I see there is a deadtime parameters.
In samba documentation : The value of the parameter (a decimal integer) represents the number of minutes of inactivity before a connection is considered dead, and it is disconnected. The deadtime only takes effect if the number of open files is zero.

Hope it helps,
Sylvain