CallExecCommand wraps non-zero exit codes as errors with the code populated on the response, so storage:exec was returning the wrapped error and being collapsed to exit 1 by LogFailWithError before the os.Exit branch ran. Both storage's CommandExec and scheduler-docker-local's TriggerSchedulerStorageExec now check ExitCode before err so the underlying tool's status flows through verbatim. Separately, the legacy host:container colon form of storage:mount used to write straight into docker-options, but storage:list now reads only attachments, so newly mounted legacy-form storage was invisible. CommandMount and CommandUnmount route the colon form through LegacyMountToEntry plus AddAttachment / RemoveAttachment, making storage:list show every mount regardless of form while preserving the existing "Mount path already exists." / "Mount path does not exist." error wording.