Abstract: Methods, systems, and computer programs are presented for backing up data to a distributed multichannel storage system. One method includes an operation for detecting, by a distributed backup system (DBS), a request for backing up data from a host to the distributed backup system. The DBS sends a request to a backup agent executing at the host to initiate the backup. The backup agent mounts an endpoint for writing to the DBS and executes a script that writes the data for the backup to the endpoint. Further, the method includes operations for creating a file system stack at the DBS associated with the endpoint, storing data received by the file system stack at the DBS, and detecting, by the DBS, an end of the backup. The DBS sends a command to the backup agent to end the backup and terminates the file system stack at the DBS.