RUT955 SD Card
This chapter provides a description on how to correctly insert a SD card into a RUT955 device.
The information in this page is updated in accordance with firmware version RUT9_R_00.07.04.3.
Before installation, make sure your SD card is compatible with RUT955 devices:
- Maximum supported (tested) SD card capacity is 64GB.
- Supported (tested) formats are: FAT32, NTFS, ext2, ext3, ext4.
- SD cards with a fixed 1.8V voltage are not supported. Make sure your memory card supports 3.3V by referring to manufacturer's documentation.
- The device is compatible only with microSD size memory cards.
Note: Due to hardware limitations, RUT955 devices do not support firmware flashing while an SD card is inserted into the device. To successfully perform a firmware upgrade, it is required to remove the memory card first. Otherwise there is a high risk of data and configuration loss.
Make sure device is powered off before inserting SD card!
Once device is booted up with an SD card installed, you can confirm it is recognized by navigating to USB Tools WebUI page. Under Mounted File Systems the SD card should be visible:
You may now use various functionality found in USB Tools with the SD card instead of a USB device.
If you are having trouble with the device recognizing your SD card, please refer to the Troubleshooting section below.
- Double check the SD card is compatible with RUT955 devices.
- Make sure the SD card is not corrupted. We recommend formatting it before first installation.
Formatting SD card using device
If you are unable to format the memory card using other means, it is possible to do it directly on RUT955 device.
- Device must have WAN access.
- SD card must be recognized by the filesystem.
- Connect to device's CLI.
- Use command
ls /dev/ | grep mmcto display recognized memory cards:
- Once confirmed the SD is recognized, we may start the formatting procedure:
- Run commands
opkg install e2fsprogsto download required tools.
- Unmount the SD card with command
- Start formatting with command
mkfs.extX /dev/mmcblk0p1where X is either 2 (for ext2 format), 3 (for ext3 format) or 4 (for ext4 format).
- A successful format procedure should look like this:
- Reboot the RUT955 device and refer to Results section
root@Teltonika-RUT955:~# ls /dev/ | grep mmc
mmcblk0p1 ← SD card
root@Teltonika-RUT955:~# mkfs.ext2 /dev/mmcblk0p1
mke2fs 1.45.6 (20-Mar-2020)
/dev/mmcblk0p1 contains a ntfs file system labelled '64gb'
Proceed anyway? (y,N) y
Creating filesystem with 15132670 4k blocks and 3784704 inodes
Filesystem UUID: 6053673b-d6b0-420d-84da-0669b71a5211
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424
Allocating group tables: done
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
Note: The Writing inode tables section might take a long time depending on the size of your SD card (10+ minutes with 64GB SD).