Exfat USB Mount Crash on Samba Use

Hi all,
I’ve been having problems with my RPi, and using it as a Kodi and media host for my apartment.
It is a RPI 2 running OSMC alpha 4, and has a 2TB USB drive attached formatted using Exfat (there are both mac and windows PCs in the house, this seemed most appropriate). It is plugged into the TV for Kodi use, but also is set up as a samba share so that anyone in the house may access the drive over the network, with new files being added to it from my main PC via Samba. I previously had this system set up on an RPi model B, but it started having problems when the RPi 2 was released.

The new Pi was working well for a few weeks until recently when it crashed completely, would not boot and had to be reinstalled. Now the mount crashes when under samba use. The main culprits at the moment are a batch script I run every so often on my computer that goes through the folders of TV shows and removes files starting with " ._ " (helps with file sorting later). This causes the mount to crash, and it is no longer visible in /media. The other I’ve noticed is a file sorting program that scans folders for missing TV shows, and sorts new ones into their correct folders and names.

The mount is set up using fstab as I needed to use umask=000 to allow read/write from other computers via Samba (chmod doesn’t work for exfat apparently). Samba is also set up so everyone is a guest.

Is there anything obviously wrong with how this is set up? Perhaps a permission or setting that I’ve missed, I am in no way an expert at this stuff and have been using plenty of google so far. I would be open to another solution as long as I do no need to put a password in on my windows computer when accessing the drive over samba. I thought it might be a resource issue, as both the exfat driver and samba daemon both have fairly high CPU usage during a transfer so being spammed with instructions during a folder scan might affect it. However, it has worked for me on an old RPi B using raspbmc and a similar setup.

Thanks

fstab:

[code]/dev/mmcblk0p1 /boot vfat defaults,noatime 0 0
/dev/mmcblk0p2 / ext4 defaults,noatime 0 0
/dev/sda1 /media/Media\040Drive exfat defaults,rw,umask=000 0 0

[/code]

Samba .conf:

[code]#

Sample configuration file for the Samba suite for Debian GNU/Linux.

This is the main Samba configuration file. You should read the

smb.conf(5) manual page in order to understand the options listed

here. Samba has a huge number of configurable options most of which

are not shown in this example

Some options that are often worth tuning have been included as

commented-out examples in this file.

- When such options are commented with “;”, the proposed setting

differs from the default Samba behaviour

- When commented with “#”, the proposed setting is the default

behaviour of Samba but the option is considered important

enough to be mentioned here

NOTE: Whenever you modify this file you should run the command

“testparm” to check that you have not made any basic syntactic

errors.

#======================= Global Settings =======================

[global]

Browsing/Identification

Change this to the workgroup/NT-domain name your Samba server will part of

workgroup = WORKGROUP

Windows Internet Name Serving Support Section:

WINS Support - Tells the NMBD component of Samba to enable its WINS Server

wins support = yes

WINS Server - Tells the NMBD components of Samba to be a WINS Client

Note: Samba can be either a WINS Server, or a WINS Client, but NOT both

; wins server = w.x.y.z

This will prevent nmbd to search for NetBIOS names through DNS.

dns proxy = no

Networking

The specific set of interfaces / networks to bind to

This can be either the interface name or an IP address/netmask;

interface names are normally preferred

; interfaces = 127.0.0.0/8 eth0

Only bind to the named interfaces and/or networks; you must use the

‘interfaces’ option above to use this.

It is recommended that you enable this feature if your Samba machine is

not protected by a firewall or is a firewall itself. However, this

option cannot handle dynamic or non-broadcast interfaces correctly.

; bind interfaces only = yes

Debugging/Accounting

This tells Samba to use a separate log file for each machine

that connects

log file = /var/log/samba/log.%m

Cap the size of the individual log files (in KiB).

max log size = 1000

If you want Samba to only log through syslog then set the following

parameter to ‘yes’.

syslog only = no

We want Samba to log a minimum amount of information to syslog. Everything

should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log

through syslog you should set the following parameter to something higher.

syslog = 0

Do something sensible when Samba crashes: mail the admin a backtrace

panic action = /usr/share/samba/panic-action %d

####### Authentication #######

Server role. Defines in which mode Samba will operate. Possible

values are “standalone server”, “member server”, "classic primary

domain controller", “classic backup domain controller”, "active

directory domain controller".

Most people will want “standalone sever” or “member server”.

Running as “active directory domain controller” will require first

running “samba-tool domain provision” to wipe databases and create a

new domain.

server role = standalone server

If you are using encrypted passwords, Samba will need to know what

password database type you are using.

passdb backend = tdbsam

obey pam restrictions = yes

This boolean parameter controls whether Samba attempts to sync the Unix

password with the SMB password when the encrypted SMB password in the

passdb is changed.

unix password sync = yes

For Unix password sync to work on a Debian GNU/Linux system, the following

parameters must be set (thanks to Ian Kahan <kahan@informatik.tu-muenchen.de for

sending the correct chat script for the passwd program in Debian Sarge).

passwd program = /usr/bin/passwd %u
passwd chat = Enter\snew\s\spassword:* %n\n Retype\snew\s\spassword:* %n\n password\supdated\ssuccessfully .

This boolean controls whether PAM will be used for password changes

when requested by an SMB client instead of the program listed in

‘passwd program’. The default is ‘no’.

pam password change = yes

This option controls how unsuccessful authentication attempts are mapped

to anonymous connections

map to guest = bad user

########## Domains ###########

The following settings only takes effect if 'server role = primary

classic domain controller’, ‘server role = backup domain controller’

or ‘domain logons’ is set

It specifies the location of the user’s

profile directory from the client point of view) The following

required a [profiles] share to be setup on the samba server (see

below)

; logon path = \%N\profiles%U

Another common choice is storing the profile in the user’s home directory

(this is Samba’s default)

logon path = \%N%U\profile

The following setting only takes effect if ‘domain logons’ is set

It specifies the location of a user’s home directory (from the client

point of view)

; logon drive = H:

logon home = \%N%U

The following setting only takes effect if ‘domain logons’ is set

It specifies the script to run during logon. The script must be stored

in the [netlogon] share

NOTE: Must be store in ‘DOS’ file format convention

; logon script = logon.cmd

This allows Unix users to be created on the domain controller via the SAMR

RPC pipe. The example command creates a user account with a disabled Unix

password; please adapt to your needs

; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos “” %u

This allows machine accounts to be created on the domain controller via the

SAMR RPC pipe.

The following assumes a “machines” group exists on the system

; add machine script = /usr/sbin/useradd -g machines -c “%u machine account” -d /var/lib/samba -s /bin/false %u

This allows Unix groups to be created on the domain controller via the SAMR

RPC pipe.

; add group script = /usr/sbin/addgroup --force-badname %g

############ Misc ############

Using the following line enables you to customise your configuration

on a per machine basis. The %m gets replaced with the netbios name

of the machine that is connecting

; include = /home/samba/etc/smb.conf.%m

Some defaults for winbind (make sure you’re not using the ranges

for something else.)

; idmap uid = 10000-20000
; idmap gid = 10000-20000
; template shell = /bin/bash

Setup usershare options to enable non-root users to share folders

with the net usershare command.

Maximum number of usershare. 0 (default) means that usershare is disabled.

; usershare max shares = 100

Allow users who’ve been granted usershare privileges to create

public shares, not just authenticated ones

usershare allow guests = yes

#======================= Share Definitions =======================

[homes]
comment = Home Directories
browseable = no

By default, the home directories are exported read-only. Change the

next parameter to ‘no’ if you want to be able to write to them.

read only = no

File creation mask is set to 0700 for security reasons. If you want to

create files with group=rw permissions, set next parameter to 0775.

create mask = 0777

Directory creation mask is set to 0700 for security reasons. If you want to

create dirs. with group=rw permissions, set next parameter to 0775.

directory mask = 0777

By default, \server\username shares can be connected to by anyone

with access to the samba server.

The following parameter makes sure that only “username” can connect

to \server\username

This might need tweaking when using external authentication schemes

valid users = %S

Un-comment the following and create the netlogon directory for Domain Logons

(you need to configure Samba to act as a domain controller too.)

;[netlogon]
; comment = Network Logon Service
; path = /home/samba/netlogon
; guest ok = yes
; read only = yes

Un-comment the following and create the profiles directory to store

users profiles (see the “logon path” option above)

(you need to configure Samba to act as a domain controller too.)

The path below should be writable by all users so that their

profile directory may be created the first time they log on

;[profiles]
; comment = Users profiles
; path = /home/samba/profiles
; guest ok = no
; browseable = no
; create mask = 0600
; directory mask = 0700

[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700

[usb]
comment = USB Share
path = /media/Media Drive
writeable = yes
guest only = yes
guest ok = yes
create mask = 0777
directory mask = 2777
browsable = yes
public = yes
read only = no

Windows clients look for this share name as a source of downloadable

printer drivers

[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no

Uncomment to allow remote administration of Windows print drivers.

You may need to replace ‘lpadmin’ with the name of the group your

admin users are members of.

Please note that you also need to set appropriate Unix permissions

to the drivers directory for these users to have write rights in it

; write list = root, @lpadmin

[/code]

What is powering the Pi?

1 Like

It is powered by a power board at the moment. The board says it outputs 5V 2100mA for that USB slot.

I seem to have fixed it. The solution was to use a better USB cable. The old one was from ebay and was fine for the RPI B, but apparently not so for the RPi 2, replacing it seems to have fixed the issue.
Thanks Dilligaf for mentioning the power it got me on the right track.