Error start host

[joy117]

Minikube version (use minikube version): v0.12.2

Environment:

• OS (e.g. from /etc/os-release): Ubuntu 16.04 LTS
• VM Driver (e.g. cat ~/.minikube/machines/minikube/config.json | grep DriverName): VirtualBox

What happened:
Run normally previously.
Yesterday, I tried to update my services during minikube running.
Suddenly, it prompt there is no free space on computer.
Then minikube connection refused.
Today, I deleted some other files to free space.
And try to "minikube start", but it just prompt as below.

minikube start Starting local Kubernetes cluster... E0204 10:55:10.367817 3682 start.go:92] Error starting host: Error starting stopped host: Too many retries waiting for SSH to be available. Last error: Maximum number of retries (60) exceeded. Retrying. E0204 10:55:10.368614 3682 start.go:98] Error starting host: Error starting stopped host: Too many retries waiting for SSH to be available. Last error: Maximum number of retries (60) exceeded

Then how can I start minikube?

Thanks a lot~