[OpenWRT] Setup USB drive and SAMBA/NAS on OpenWrt from scratch

After flashing the TP-LINK 703N router from U-boot failsafe webserver, you are having a brand new router. Software need to be installed to perform certain tasks. In this article, we are talking about setup a NAS using a USB drive from scratch.

By default, Openwrt doesn’t include any USB driver, so the first thing you need to do is to install the USB driver.

First you need to setup 703N in router mode (WAN mode), or AP mode (LAN mode). That makes sure 703N can access the internet. The client (your PC) should connect to 703N via wireless.

Lucky, it’s very easy to install software in Openwrt Luci web page.

Go to System menu, software

nas1

Like every Linux system, package list need to be updated before install the software. Press the Update button.

In the web page or SSH, install the following packages:

#Those are USB drivers
kmod-usb-core
kmod-usb2
kmod-usb-storage
kmod-usb-storage-extras
block-mount
kmod-usb-uhci
kmod-usb-ohci

#Those are file system support, you may choose only the ones you are using:
kmod-fs-exfat
kmod-fs-ext4
kmod-fs-ntfs
kmod-fs-vfat

#IO charset, IMPORTANT
kmod-nls-cp437
kmod-nls-iso8859-1

#This one is for auto mount
block-mount

#These are samba server and web page configuration software:
luci-app-samba
luci-i18n-samba-en
samba36-server

To enable the auto mount feature, so that you don’t need to mount the USB device manually each time you plug it in, run the following in SSH:

root@OpenWrt:~# block detect > /etc/config/fstab
root@OpenWrt:~# cat /etc/config/fstab
config 'global'
        option  anon_swap       '0'
        option  anon_mount      '0'
        option  auto_swap       '1'
        option  auto_mount      '1'
        option  delay_root      '5'
        option  check_fs        '0'

config 'mount'
        option  target  '/mnt/sda1'
        option  uuid    '40e0-6302'
        option  enabled '0'

root@OpenWrt:~# /etc/init.d/fstab enable

Simply plug in a USB drive formatted in FAT, reboot the router and check if USB device is mounted by:

df -h

The USB drive should be here in the list other than a few system partitions.

Then let’s configure samba, there are two config files we need to edit. First, edit /etc/config/samba, this file tells samba where are the share point in the system. Here is my configuration:

config samba
	option 'name'			'openwrt'
	option 'workgroup'		'openwrt'
	option 'description'	        'openwrt'
	option 'homes' 			'1'
		
config sambashare
	option 'name'			'mnt'
	option 'path'			'/mnt/'
	option 'read_only'		'no'
	option 'guest_ok'		'yes'
	option 'create_mask'	        '0700'
	option 'dir_mask'		'0700'
	#option 'users'			'abc'


config sambashare
	option 'name'			'root'
	option 'path'			'/'
	option 'read_only'		'no'
	option 'guest_ok'		'no'
	option 'create_mask'	        '0700'
	option 'dir_mask'		'0700'
	#option 'users'			'abc'

It shares the file system as well as the mount point.

The second file is /etc/samba/smb.conf, this is the standard samba config file. Refer to Samba manual for detail. Here is my smb.conf file:

[global]
        netbios name = |NAME| 
        workgroup = |WORKGROUP|
        server string = |DESCRIPTION|
        syslog = 10
        encrypt passwords = true
        passdb backend = smbpasswd
        obey pam restrictions = yes
        socket options = TCP_NODELAY
        unix charset = utf-8
        preferred master = yes
        os level = 20
        security = user
        guest account = nobody
# For safety, disable root user
#        invalid users = root
        smb passwd file = /etc/samba/smbpasswd

enable samba auto start and reboot the router again:

/etc/init.d/samba enable

Samba should be able to start automatically and can get access to USB immediately after reboot.

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