dump master

Hello,

I want to know how to dump the master db. I´ve tried with the command dump database master to "path_backup"

I get this message:

WARNING: In order to LOAD the master database, the ASE must run in single-user mode. If the master database dump uses multiple volumes, you must execute sp_volchanged on another ASE at LOAD time in order to signal volume changes.

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Backup Server: 4.135.2.1. Invalid Device: you cannot dump to or load from a directory, "path_backup".

I can't assign the same backup directory to DB and master dumps?

Thanks a lot.