cdrecord wodim blank=disc
wodim: No write mode specified.
wodim: Asuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
Quickly guessing the name of a drive capable to write CD-R, please wait...
Found /dev/cdrw, assuming dev=/dev/cdrw
wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.Error trying to open /dev/cdrw exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/cdrw exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/cdrw exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/cdrw exclusively (Device or resource busy)... retrying in 1 second.
Error trying to open /dev/cdrw exclusively (Device or resource busy)... giving up.
wodim: No such file or directory. 
Cannot open SCSI driver!
For possible targets try 'wodim --devices' or 'wodim -scanbus'.
For possible transport specifiers try 'wodim dev=help'.
For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from
the wodim documentation.