There are several ways to check if a disk is failing in Linux, depending on the type of disk and the system you are using. Here are a few methods you can try:
- Use the smartctl command to check the S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) status of the disk. This will show you detailed information about the health and performance of the disk, including any errors or issues that may indicate that the disk is failing.
- Use the lsblk command to view a list of block devices on the system. This will show you the status of each disk, including whether it is healthy or failing.
- Check the system logs for messages related to disk failures. Depending on the type of disk and the system you are using, there may be specific log messages that indicate that a disk is failing or has failed. You can use the dmesg command to view the kernel logs, or check the logs in the /var/log directory for more information.
- Use a disk utility or monitoring tool to check the health of the disk. There are many tools available that can monitor the health of disks and alert you if there are any issues or failures. Some examples include hddtemp, gsmartcontrol, and Disk Utility (on Ubuntu and other Debian-based systems).
It's important to note that these methods may not always be able to detect a failing disk, especially if the failure is intermittent or has not yet caused any significant problems. Therefore, it's always a good idea to regularly back up important data and monitor the health of your disks to prevent data loss due to disk failure.