3-3
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
Table 3-1 Front Panel LEDs, Definitions of States
LED Name State
1
SAS
SAS/SATA drive fault
Note: If your controller is a
Cisco UCS RAID SAS 9300-8i
or 9300-8e HBA, see Cisco UCS
SAS 9300-8e HBA
Considerations, page C-4 for
differing LED behavior.
• Off—The hard drive is operating properly.
• Amber—Drive fault detected.
• Amber, blinking—The device is rebuilding.
• Amber, blinking with one-second interval—Drive locate function activated.
2
SAS
SAS/SATA drive activity
• Off—There is no hard drive in the hard drive tray (no access, no fault).
• Green—The hard drive is ready.
• Green, blinking—The hard drive is reading or writing data.
1
PCIe
NVMe PCIe SSD status
(SFF, 8-drives version only)
• Off—The drive is not in use and can be safely removed.
• Green—The drive is in use and functioning properly.
• Green, blinking—the driver is initializing following insertion or the driver is
unloading following an eject command.
• Amber—The drive has failed.
• Amber, blinking—A drive Locate command has been issued in the software.
2
PCIe
NVMe PCIe SSD activity
(SFF, 8-drives version only)
• Off—No drive activity.
• Green, blinking—There is drive activity.
3 Power button/LED
• Off—There is no AC power to the server.
• Amber—The server is in standby power mode. Power is supplied only to the
Cisco IMC and some motherboard functions.
• Green—The server is in main power mode. Power is supplied to all server
components.
4 Unit identification
• Off—The unit identification function is not in use.
• Blue—The unit identification function is activated.
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