When installing an SAP HANA multi-host database system using default settings, it is necessary to specify certain file system locations to ensure proper configuration and operation of the system. These include the location for log files, typically under /hana/log/<SID> (A), where <SID> is the System ID of the SAP HANA instance. This path is used to store log files that are crucial for database recovery and auditing. Another important file system location is /hana/shared (D), which is used to store shared data that can be accessed by all hosts in a multi-host SAP HANA system, such as binary files and shared configuration data. The locations
/usr/sap/hostctrl (B) and /usr/sap/<SID> (C) are significant for SAP system installations but are not specifically required for the SAP HANA database system installation using default settings.