Abstract
There has always been a strong market requirement for rewritable optical disk drive as a follow-on product to read-only and write-once type optical disks. Fujitsu has been researching magneto-optic recording technologies for rewritable optical disk, and has developed a disk sub-system with initiative of the National Aerospace Laboratory (NAL) in Tokyo. The drive has a large storage capacity of 8.9 GB/spindle with a few seconds of access time. It can store data economically in a small floor space, and it can be used as a supplement or partial alternative to magnetic disk drives or tape library units. The sub-system will be used from the beginning of 1989. This paper explains the drive technologies, support software as well as the application of this new sub-system at NAL.
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