Release 10.1A: OpenEdge Getting Started:
Database Essentials

Summary

Disks are your most important resources. Begin by purchasing reliable disk arrays, configure them properly to allow consistent fast access to data, and monitor them for performance and fill rate. Monitor your disks and track their fill rate so you do not run out of space. You must track the consumption of storage space to accurately plan for data archiving, and to allow planning time for system expansion due to growth.