• With direct-attached storage, more storage means more servers
• Cost of server hardware, software, installation, and maintenance can triple the cost of new storage
• Increased implementation time decreases business agility
With direct-attached storage, each disk is attached to a server: Adding more direct-attached storage means adding more servers, due to:
The limited number of devices that can be managed by a server’s SCSI bus The server’s total processing capacity Adding more servers can triple the cost of new storage: Server hardware Server OS and application software licenses Deployment time
Operational and maintenance costs More servers mean more single points of failure, increasing the risk of downtime.