User's Manual

Table Of Contents
AI7688H User Manual
-19-
Copyright@2016 AcSiP
4 File Storage
4.1 USB Drive and SD Card
When a USB drive or SD card is inserted into AI7688H, they can be accessed under /Media/SD* or
/Media/USB* (The device name displayed varies depending on the number of drives you use and
the number of partitions available on the USB drive or SD card).
You can use the following commands to check the contents of the USB drive and SD card:
In this example, a USB drive named USB-A1 is used:
# ls /Media/USB-A1
In this example, a SD card named SD-P1 is used:
# ls /Media/SD-P1
4.2 How to mount the root FS on a SD card
The on-board flash is a raw flash. It is with limited write cycles (about 100,000 times) and without
wear leveling mechanism and atomic write operation. So it is not recommended to write user
data to the on-board flash frequently. Besides, its storage is also limited to 32MB, the spare space
might not be sufficient for storing lots of user data and software packages. As a result, it is
recommended to mount the root FS on a SD card for getting more and reliable storage.
Steps:
Below are the steps for making this work. For details, please refer to the OpenWrt WiKi for
extroot. Note: the procedure below assumes there is only one partition on the SD card. If there
are multiple partitions on the SD card, you can use fdisk command to manage partition settings.
1. Insert a microSD card into the AI7688H device. Warning: all the data on the SD card will be
erased in the following steps.
2. Make sure the device is under Station mode for accessing internet.
3. Open the system console of the AI7688H.
4. Type the following commands for installing related packages: