CreateDir create the target directory with error handling.

FileExisted checks if a file or directory exists.

FSInfo linux returns (available bytes, byte capacity, byte usage, total inodes, inodes free, inode usage, error) for the filesystem that path resides upon.

GetMetrics get path metric.

GetNodeId reads node metadata from file.

IsDir checks if the target path is directory.

Mounted checks whether a volume is mounted.

NewVolumeLocks returns new VolumeLocks.

RunCommand runs a given shell command.

ServerReachable tests whether a server is connection using TCP.

Unmount tries to unmount a device from the node.

WaitTimeOut waits for a mount of time before continues.

SnapshotOperationAlreadyExistsFmt string format to return for concurrent operation.

VolumeOperationAlreadyExistsFmt string format to return for concurrent operation.

Metrics represents the used and available bytes of the Volume.

VolumeLocks implements a map with atomic operations.