After a recent update, I found that a hard drive cannot be mounted by Dolphin, and it reports:
An error occurred while accessing ‘DATA’, the system responded: The requested operation has failed: Error mounting /dev/sda1 at /run/media/zhongpu/DATA: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error
On the other hand, this can be mounted using sudo mount /dev/sda1 /run/media/zhongpu manually.