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LED Disk Status Not Displayed Correctly Using Intel® Virtual RAID on CPU (Intel® VROC) for Linux*

TroubleshootingArticle ID:0000911819/25/24

Environment

Operating System: Linux*

Description

After a clean RHEL* 8.3 installation, all the status LEDs of the disks connected to the server do not work, and do not reflect if the disks are in a rebuilding or failed state.

Resolution

The Intel® VROC RAID LED management in Linux* uses the utilities ledmon and ledctl to monitor the LED status. They are included with all the Intel® VROC supported Linux* distributions, but chances are they are not enabled or installed, which will cause the disks to not display any LED activity to reflect the status like rebuilding or failed.

It is common for this service to be disabled after a clean operating system installation. The commands below can help enabling and starting the service:

  • To run ledmon manually use the following command. It will be disabled again after a reboot.
    • $ ledmon
  • To check the status of the service, run it and enable it for subsequent reboots, use the following commands:
    • $ systemctl status ledmon.service
    • $ systemctl start ledmon.service
    • $ systemctl enable ledmon.service

Additional information

It is also possible to modify the rc.local file to start the ledmon service during boot. To accomplish this, modify the file and add ledmon to the last line, then save the changes and update the permission of the file to be executable.