MySQL installation successful, but unable to start.
Please assist what is to be done based on below startup log.
root@osboxes ~ # systemctl status mariadb.service
● mariadb.service - MariaDB 10.3.13 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sat 2019-08-31 21:31:57 IST; 6min ago
Docs: man:mysqld(8)
https://mariadb.com/kb/en/library/systemd/
Process: 3207 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE)
Process: 3195 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] && systemctl set-environment _WSREP_STAR>
Process: 3194 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
Process: 3193 ExecStartPre=/usr/bin/mariadb_first_install (code=exited, status=0/SUCCESS)
Main PID: 3207 (code=exited, status=1/FAILURE)
Status: "MariaDB server is down"
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] Plugin 'InnoDB' init function returned error.
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [Note] Plugin 'FEEDBACK' is disabled.
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] Could not open mysql.plugin table. Some plugins may be not loaded
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] Unknown/unsupported storage engine: InnoDB
Aug 31 21:31:57 osboxes mysqld[3207]: 2019-08-31 21:31:57 0 [ERROR] Aborting
Aug 31 21:31:57 osboxes systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
Aug 31 21:31:57 osboxes systemd[1]: mariadb.service: Failed with result 'exit-code'.
Aug 31 21:31:57 osboxes systemd[1]: Failed to start MariaDB 10.3.13 database server.
Mod Edit: Code Tags.