Oracle Database - SYSASM privileges
About
SYSASM privileges for Automatic Storage Management files provide administrator privileges for storage file.
In Oracle documentation, the operating system group whose members are granted SYSASM privileges is called the OSASM group, and in command lines, is referred to as asmadmin.
Automatic Storage Management can support multiple databases.
Members of the OSASM group can use SQL to connect to an Automatic Storage Management instance as SYSASM using operating system authentication.
The SYSASM privileges permit mounting and dismounting disk groups, and other storage administration tasks. SYSASM privileges provide no access privileges on an RDBMS instance.