2. Hardware Overview
Disk
Activity LED
Item
Ethernet Status LED
Disk Status LED
Disk Activity LED
System Status LED
One-Touch Backup Button
Power Button
D-Link DNS-1550-04 Quick Installation Guide
Front Panel
PSU
Status LED
One Touch
Backup LED
One-Touch
Disk
Backup Button
Status LED
USB
Connection
Function Description
LED – Orange: Network active in 100 MB/s
Green: Network active in 1000 MB/s
• Drive is healthy: green
• Disk error: red
• Disk rebuilding: orange
• Physical drive locate: flashing green
Disk access status
• Power on: flashing green -> orange -> red
• System ready: green
• Disk array degrade: orange
• Disk array offline/ Enclosure error: red
Enable one-touch backup. Flashing green while
backup is processing
Power on/off the NAS
Ethernet
Status LED
System
Status LED
Power
Button
3