Supermicro 2028UT-BC1NRT, User Manual, Page: 23 / 138

3-3
Chapter 3: System Interface
Overheating
There are several possible responses if the system overheats.
Overheat Temperature Setting
Some backplanes allow the overheat temperature to be set at 45, 50, or 55 by
changing a jumper setting. For more information, consult the backplane user manual
at www.supermicro.com. (Click Support, then the Manuals link.)
Responses
If the server overheats:
1. Use the LEDs to determine the nature of the overheating condition.
2. Confirm that the chassis covers are installed properly.
3. Check the routing of the cables and make sure all fans are present and operating
normally.
4. Verify that the heatsinks are installed properly.
3-4 Drive Carrier LEDs
The chassis includes externally accessible SAS/SATA/NVMe drives. Each drive
carrier displays two status LEDs on the front of the carrier.
LED Color Blinking Pattern Behavior for Device
Activity LED
Blue Solid On SAS/NVMe drive installed
Blue Blinking I/O activity
Status LED
Red Solid On Failed drive for SAS/SATA/NVMe
with RSTe support
Red Blinking at 1 Hz Rebuild drive for SAS/SATA/
NVMe with RSTe support
Red Blinking with two
blinks and one stop
at 1 Hz
Hot spare for SAS/SATA/NVMe
with RSTe support
Red On for five
seconds, then off
Power on for SAS/SATA/NVMe
with RSTe support
Red Blinking at 4 Hz Identify drive for SAS/SATA/
NVMe with RSTe support
Green Solid On Safe to remove NVMe device
Amber Blinking at 1 Hz Attention state—do not remove
NVMe device