2.3GB Rewritable Optical Disk
By Hewlett Packard HP

Rewritable Magneto Optical Disk is designed for use with large scale, high security, or permanent storage applications and Hewlett-Packard Jukeboxes. Offers a 2.3GB capacity with a 512 bytes/sector (2X) write speed. Provides easy data access and permanent data storage that can't be altered or erased. ... 

5.2GB Rewritable Optical Cartridge
By Hewlett Packard HP

Rewritable Optical Disk is designed for use with large-scale, high-security, or permanent storage applications. Disk offers a 5.2GB capacity and recording speed of 2048 bytes per sector (8X) while providing up to 100 years of archival life. Antistatic shell coating prevents static buildup, which can cause read/write errors. ...