oracle error -- ORA-00302: limit of string logs exceeded

ORA-00302:	limit of string logs exceeded
Cause:	The maximum number of redo log files has been exceeded.
Action:	Use the CREATE CONTROLFILE command with a larger value for MAXLOGFILES if the compatibility is lower than 10.2.0. Otherwise, allocate more storage space for the control file.

oracle error -- ORA-00301: error in adding log file 'string' - file cannot be created

ORA-00301:	error in adding log file 'string' - file cannot be created
Cause:	The creation of the redo log file failed
Action:	Check: 1) there is enough storage space on the device 2) the name of the file is valid 3) the device is online 4) an IO error occurred Also, it is possible REUSE was specified on the command line and a file of the incorrect size exists. Either do not specify REUSE or use a file of the correct size.

ORA-00300:	illegal redo log block size string specified - exceeds limit of string
Cause:	The specified block size of the redo log is greater than the maximum block size for the operating system.
Action:	Create the redo log on a device with a smaller block size