https://www.pcworld.idg.com.au/article/63318/asus_crw-5224a/ "We were also impressed with the inclusion of FlextraSpeed to deal with discs that can’t withstand high-speed burning. FlextraSpeed automatically assesses the quality of the disc and optimises the burning speed — yet another good way to prevent disc write errors."
https://www.manualslib.com/manual/548879/Asus-Scb-2424a-U.html?page=11 "FlextraLink™ incorporates a flexible strategy that prevents buffer under-run
problems caused by an empty data buffer. This CD-RW drive technology
allows continuous monitoring of the data buffer status during the write
process. Once the available data drops to approximately 1% of the total
buffer capacity, the drive stops recording and marks the last write position.
When new data is received from the host, it is loaded to the data buffer,
and the laser is repositioned to link the new data with the data already
written. FlextraLink remains fully operational throughout the writing process, and available for other applications."
