You have multiple filesystems installed on your hard drive, each of which is mounted to a different directory in the Linux directory tree. At startup time, the /dev/sdc6 filesystem was unable to be...

You have multiple filesystems installed on your hard drive, each of which is mounted to a different directory in the Linux directory tree. At startup time, the /dev/sdc6 filesystem was unable to be mounted due to an error. What might have been the source of this problem? What commands might you use to find out more about the nature of the issue and how it came to be?