A minimum of two Oracle redo log groups/files must be defined and configured to be stored on separate, archived physical disks or archived directories on a RAID device.

The Oracle redo log files store the detailed information on changes made to the database. This information is critical to database recovery in case of a database failure.

From SQL*Plus:

select count(*) from V$LOG;

If the value of the count returned is less than 2, this is a finding.

From SQL*Plus:

select count(*) from V$LOG where members > 1;

If the value of the count returned is less than 2 and a RAID storage device is not being used, this is a finding.

To define additional redo log file groups:

From SQL*Plus (Example):

alter database add logfile group 2 ('diska:log2.log' , 'diskb:log2.log') size 50K;

To add additional redo log file [members] to an existing redo log file group:

From SQL*Plus (Example):

alter database add logfile member 'diskc:log2.log' to group 2;

Replace diska, diskb, diskc with valid, different disk drive specifications.

Replace log#.log file with valid or custom names for the log files.