Search Our Support Knowledge Base

Find product articles and support information.

My Cloud OS 3: Data Volume Failed to Mount - Error Code 0004



Description


Data on the My Cloud drive is not accessible or the Dashboard generates a "Data Volume Failed to Mount 0004" error message on a single bay My Cloud with 04.xx.xx-xxx firmware.

The data volume has failed to mount.


Resolution


Follow the steps below to check if the /DataVolume is mounted and if My Cloud shares are present or not.

Login using SSH


Enable SSH and access the My Cloud
For instructions, please refer to Answer ID 26497: How to Access WD My Cloud Using SSH (Secure Shell)


Check for /DataVolume and Shares


Type the commands listed below into the SSH Console and press the Enter key on the keyboard after each command.


ls /

  • Look for DataVolume
  • If the DataVolume is not present, it is not mounted and the My Cloud may require data recovery or a Quick Factory Restore.
  • If the DataVolume is present, enter the next set of commands one after the other



ls /DataVolume
ls /shares

  • shares should be listed under /DataVolume
  • Public, SmartWare  TimeMachineBackup  and user created shares should be listed under shares


Check Drive for Data


Type the command below and check the hard drive Capacity Used to ensure data is present on the drive.

df

In the example image, the internal hard drive is 64% filled to capacity which means the data is present on the drive.


Extract and Retrieve Data

If the shares and data are available, follow the steps in Answer ID 24823: My Cloud: How to Extract and Retrieve Data to access, extract and retrieve the data from the My Cloud.


Check for Drive and File System Errors


Type the command below and check the output for hard drive I/O, block or sector errors which indicate a failing hard drive.

dmesg

IMPORTANT:

Western Digital does not perform data recovery services.
Contact one of our Data Recovery Partners.

Any agreement you may reach with the service provider is a matter between you and the service provider. Western Digital makes no warranty, express or implied, regarding the services provided by the service provider, including but not limited to, any warranty regarding the quality or reliability of services performed by it. Your selection of the service provider is at your own risk. Western Digital assumes no liability for any loss or damages of any kind that relate to, arise out of or result from the performance of services by the service provider, including, but not limited to any loss of data contained on a Western Digital hard drive.

Need more help?
Western Digital Warranty Policy



Details
Answer ID 14233
Published 08/20/2018 02:01 AM
Updated 08/03/2022 06:58 AM

Please rate the helpfulness of this answer