This moves validation of options to the start of the Create function
to prevent hitting the filesystem and having to remove the volume
from disk.
Also addressing some minor nits w.r.t. errors.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The io/ioutil package has been deprecated in Go 1.16. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
