No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Data Cannot Be Written to the SD Card

Data Cannot Be Written to the SD Card

Common Causes

This fault is commonly caused by one of the following:

  • The SD card is ejected.
  • The SD card space is full.
  • The SD card is damaged.

Troubleshooting Flowchart


Troubleshooting Procedure


Saving the results of each troubleshooting step is recommended. If troubleshooting fails to correct the fault, you will have a record of your actions to provide to Huawei technical support personnel.


  1. Check whether the SD card is ejected.

    Check whether the SD card indicator on the SRU is steady on or blinks. If the indicator is off, the SD card is ejected. Run the dir command in the user view. If the command output does not contain "sd0:", the SD card is ejected.

    • If the SD card is ejected, install the SD card in the slot.

    • If the SD card is properly installed, go to step 2.

  2. Check whether the SD card has available space.

    Run the dir sd0: command in the user view to check whether the SD card has available space.

    • If the SD card has no available space, copy the files on the SD card to the local storage device, and then delete the log files from the SD card to free up the space.

    • If the dir sd0: command cannot display the remaining space of the SD card or the remaining space is displayed but files still cannot be written into the space, the SD card may be damaged. Perform the following operations to replace the SD card.

    1. Push the SD card so that the SD card is ejected. Place the damaged SD card into the ESD bag.
    2. Install a new SD card. Ensure that the SD card is secured and the SD card indicator is on.
    3. Check the running status of the SD card and view logs. When the SD card is installed, logs are generated. Run the dir command. If information about the SD card is displayed, the new SD card is installed properly.
    • If the fault persists after the SD card is replaced, go to step 3.
  3. Collect the following information and contact technical support personnel.

    • Results of the preceding troubleshooting procedure
    • Configuration file, log file, and alarm file of the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600

Relevant Alarms and Logs

Relevant Alarms

DEV/4/MEMORYCARDEVENT: Register the device sd0: successfully

DEV/4/MEMORYCARDEVENT: Device sd0: unregister successfully

Relevant Logs


Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 456317

Downloads: 4321

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next