Auto mounting internal microSD card of the RT-N66U ?

[jenom]

I have a good-old RT-N66U with Asuswrt, amtm+Entware installed on a 1 GB USB drive.
Added a 2 GB micro SD card into the INTERNAL slot, but it is not detected on main page as USB device, and of course does not exist in any Media Services & Servers.
Manually added as /dev/sdb1, formatted and mounted on /opt/media.
My plan is to use it as a mp3/m4a storage and music server with minidlna.
Edited /etc/minidlna.conf and changed db_dir to /opt/media/ location and restarted minidlna .....It worked!
However, this will get lost, when router reboots.
I would like to get this microSD card automatically detected & mounted, and maybe Media Services & Servers would find it .
Any suggestions? Thanks!

 

[ColinTaylor]

I wouldn't use /opt/media as a mount point if I were you. That would clash with Entware which is uses /opt. I would use the router's "normal" mount naming convention, like /tmp/mnt/media (where media is the volume label of the SD card).

Have a look through the router's syslog during boot up to see at what point the internal flash drive is detected. From what I remember, once the SD card has been formatted correctly it should be automatically mounted at boot time.

 

[bbunge]

If I remember the internal card needs an EXT2 or EXT3 format.

 

[jenom]

attached a serial connection to check what is happening
both sda and sdb detected by "hotplug"

check_action 0
set_action 7
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] Assuming drive cache: write through
block hotplug INTERFACE=8/0/0 ACTION=add USBPORT=1-1.1 HOST=(null) DEVICE=sda
check_action 7
block hotplug INTERFACE=8/0/0 ACTION=add USBPORT=1-1.1 HOST=(null) DEVICE=sda1
check_action 7
block hotplug INTERFACE=8/0/0 ACTION=add USBPORT=1-1.1 HOST=(null) DEVICE=sda2
check_action 7
set_action 0
sd 1:0:0:0: [sdb] Assuming drive cache: write through
sd 1:0:0:0: [sdb] Assuming drive cache: write through

Next is the existing sda1 USB with ENTWARE gets mounted:

[310 hotplug:hotplug_usb +12] mount to dev: /dev/sda1
generate_wl_para(0x1010): unit 1EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended
subunit -1
[310 hotplug:mount_r +13] USB ext2 fs at /dev/sda1 mounted on /tmp/mnt/ENTWARE.
num_of_mssid_support(0x0096): [mssid] support [3] mssid

There is no USB memory in second USB, so nothing gets mounted:

[310 hotplug:hotplug_usb +23] end of mount
[319 hotplug:hotplug_usb +23] mount to dev: /dev/sda2
[319 hotplug:mount_r +23] USB /dev/sda2(unknown) failed to mount at the first try!
[319 hotplug:mount_r +23] give it another try - guess fs.
[319 hotplug:hotplug_usb +23] end of mount

However, "hotplug" does not try to mount internal microSD card located on /dev/sdb !

 

[ColinTaylor]

Doesn't look to me like hotplug is detecting sdb at all. So probably the easiest solution is to mount the filesystem in a services-start script.

 

[jenom]

And how about the idea, not to start any media server in GUI, and just install minidlna (maybe mediatomb) in Entware....so it would keep it's settings on reboot?