For database servers, you require:
Disk subsystem that guarantees that acknowledged writes are non-volatile (for details, see the Environmental Considerations for Deploying JADE white paper on the JADE Web site at https://www.jadeworld.com/developer-center/resource-library/white-papers)
Available disk space of four times the expected database size, allowing for growth
RAID 1+0 configuration (for details, see the Environmental Considerations for Deploying JADE white paper on the JADE Web site at https://www.jadeworld.com/developer-center/resource-library/white-papers)