What is the Sun Microsystems 540-4689?
The Sun Microsystems 540-4689 is a network/telecom equipment component, listed by the manufacturer as "36.4GB 10000RPM Ultra-320 SCSI 8MB Cache Hot-Pluggable 80-Pin (LVD) 3.5-Inch HDD with Bracket". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.