When attempting to install an OTA update on an Elo Android Backpack or I-Series device using a USB flash drive, Android Recovery may display a "No such file or directory" error and abort the installation.

This error usually means Android Recovery was unable to detect or mount the USB storage device. It does not necessarily indicate a problem with the OTA update file itself.

Symptoms

After selecting Apply update from U-Disk in Android Recovery, you may see errors similar to the following:

• Failed to mount /usb: No such file or directory
• Failed to mount /usb2: No such file or directory
• Couldn't mount /usb or /usb2
• Installation aborted

Example Recovery Error

What Does "No Such File or Directory" Mean?

Android Recovery expects the USB storage device to be available at specific mount locations, such as /usb or /usb2.

If Recovery cannot detect or mount the USB flash drive at those locations, it reports "No such file or directory" and cannot access the OTA update package.

In this situation, the error is referring to the USB storage mount location, not necessarily to the OTA ZIP file itself.

Cause

This condition is typically caused by Android Recovery being unable to properly detect, recognize, or mount the USB flash drive.

Possible causes include:

• The USB flash drive was not detected by Android Recovery.
• The USB drive's filesystem format or partition layout is not recognized by the recovery environment.
• The USB drive is connected through a hub, adapter, or other connection method that prevents it from mounting correctly.
• The specific USB flash drive is not being recognized correctly by the recovery environment.

Resolution

If the OTA update fails from USB with a "No such file or directory" or USB mount error, use an SD card to install the OTA update instead:

1. Copy the OTA update ZIP file to a supported SD card.
2. Insert the SD card into the Elo Android Backpack SD slot.
3. Boot the device into Android Recovery.
4. Select Apply update from SD card.
5. Select the OTA update ZIP file.
6. Allow the update to complete.
7. Select Reboot system now after the installation finishes.

Alternative Troubleshooting: Retrying the USB Drive

Before retrying the OTA update from a USB flash drive, perform the following troubleshooting steps:

• Remove and reinsert the USB flash drive.
• Connect the USB drive directly to the device without using a hub or adapter.
• Try a different, standard USB flash drive (FAT32 filesystem is highly recommended).
• Place the OTA ZIP file in the root directory of the USB drive.
• Verify that the USB drive uses a simple partition layout (e.g., MBR master boot record rather than GPT partition style).

Related Article: What is causing a Signature verification failed error 21 during a USB OTA update?