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TAMS CDwriter Write Options Descriptions (click image to go back) Dummy Write. You can use this option to perform a dry run and ensure the disk can be written without any problems. FIFO Buffer Size. Cdrecord has an internal buffer whose size you can change with this option. Device. This comprises three numbers. The first number identifies the scsi-bus on which the CD-R/W device resides. The second number corresponds to the scsi-id of the device on the scsi-bus. The third digit indicates the lun or logical unit number of the device. Luns are used to distinguish sub-devices within a device. For example, CDs in a CD-ROM changer. Speed. This allows you to choose the speed with which you write to the drive. The range of speeds will vary according to the device specified (see above). Verbosity. This instructs cdrecord on the amount of information to display. Typically, the highest level is used to diagnose problems. Erase Mode. This option is only relevant to CD-R/W devices. In Fast mode, cdrecord will blank the Table of Contents and other minimal information on the disk, thus making the disk seem blank. In All mode the whole disk is blanked. This can take up to 80 minutes.