Uid Led (Id); Led On A Hard Disk Drive - NEC Express5800 Series User Manual

Chapter 1 General Description
4.7.6

UID LED (ID)

The UID LED is provided one each at the front and rear of the server. If you press the UID switch provided at
the front or rear of the server, the light turns on. If you press it again, the light turns off. It flashes when
commands from software are received. This LED is used to identify the target server among multiple servers
installed in a rack. Especially when performing maintenance from behind the server, lighting the LED will
help you to identify which server to work with.
4.7.7

LED on a hard disk drive

DISK LED on a hard disk drive indicates several states.
3.5-inch hard disk drive
•
The LED flashes green
This indicates a hard disk drive is being accessed.
•
The LED flashes amber
When Logical Drives are configured in the RAID System, this indicates the installed hard disk drive is
broken.
•
The LED flashes green and amber alternately
This indicates that a hard disk drive is being rebuilt (not a defect). In a RAID System, the hard disk drive
is automatically rebuilt upon replacing a broken hard disk drive (auto build function). The LED flashes
green and amber alternately while a hard disk drive is being rebuilt.
The LED goes off when rebuilding completes. If rebuilding fails, the LED flashes amber.
44
Tips
You can turn on an LED using remote management software.
DISK LED
Tips When Logical Drives (RAID 1, 5, 6, 10, and 50) are configured in the RAID System, the
system can continue to operate even if one hard disk drive (2 drives in the case of RAID 6)
failed. However, we recommend you replace the failed hard disk drive and perform
rebuilding as soon as possible (hard disk drives are replaced by using hot swapping).
Important Observe the following precautions whenever you use the auto build function.
• Do not turn off or reboot the server while a hard disk drive is being rebuilt.
• Wait at least 90 seconds before installing a hard disk drive after removing one.
• Do not replace a hard disk drive while another hard disk drive is being rebuilt.
Express5800/R110e-1E User's Guide
4. Names and Functions of Parts
DISK LED
2.5-inch hard disk drive