Problem with SD card in USB GSM/LTE modem

[waldo]

I moved from Tomato by Shibby firmware to Asus-Merlin firmware (376.45).
Problem is with automatic mounting of SD card inserted in Huawei GSM/LTE modem. Card is not mounted automaticaly. On Tomato it is working OK.

I can mount this card manualy, all works as expected.
When I added script pre-mount or service-start and tried to mount this SD card from script it is mounted OK, but after some seconds, SD card is unmounted automaticaly. It looks that unmounting is done during Samba start/restart.

Any idea how to mount SD card when other USB HDD are mounted?

I need this card for storing traffic data. Yes I can store data on HDD, but HDD is spin down when not used (most of the time), and storing traffic data every hour will start HDD again, and I want to avoid it.

 

[waldo]

Same problem also in the latest version of firmware.
Testted on RT-N16 and RT-AC56.

Orginal firmware from Asus also has same problem.

 

[cyborgpunte]

I have mine mount UUID in wan-start working

Not telling : what Huawei dongle, with what FW.
what SDflash with what filesystem