Choose the disk developed especially for your optical drive. HP optical disks are your assurance of disk-to-drive compatibility -- the key to secure protection of your valuable data. Select HP optical disks to enhance the reliability, performance, and longevity of your drive. Each HP optical disk is encased in a sturdy, poly-carbonate casing to inhibit both the attraction of dust particles and static buildup. HP 5.25-inch magneto-optical disks provide a storage alternate that surpasses all others in capacity, durability and flexibility. The 600, 1.2 or 1.3 GB capacity of each HP optical write-once disk with 512 or 1024 bytes per sector translates to about 650000 pages of text. These disks are ideal for data management in information-intensive environments. The HP write-once disks are designed for permanent storage of large volumes of unalterable information. HP optical disks are engineered to meet and surpass the most stringent industry standards. Outstanding attention to quality in design and testing insures the highest levels of data integrity. HP optical disks are tested rigorously with HP optical jukeboxes. They are second to none in quality, making them ideal for the rigors of swap-intensive jukebox environments. HP optical disks meet ISO/IEC standards. All HP optical disks have an archival life of 100 years, warranted for the life of the media.