Rewritable Optical Disk with 9.1GB (4,096 bytes/sector) and a 14X speed is designed for easy data access and permanent data storage that can't be altered or erased. Use with use with large scale, high security, or permanent storage applications. Antistatic shell coating to prevents static buildup which can cause read/write errors. Uses magneto-optical technology that combines the advantages of both magnetic and laser technologies to capture and store data. Write-once magneto-optical disk offersa 100-year archival life. Engineered to meet and surpass ISO/IEC/ANSI standards.