When the HDD 1-5 LED lights up in red and the E/R
lights up in red, it means that the corresponding red light has an
error in the hard disk. Please replace the defective hard drive
with a new hard disk with a capacity not less than the old hard
drive when the enclosure is powered down. If the activity light of
the new hard disk flashes blue and red alternately and the E/R
light flashes red, it means that the replacement hard disk is in the
process of data recovery (Rebuild mode), and other hard disks
will also flash blue lights at the same time. Please do not shut
down and wait patiently. The recovery speed is about 180M/ s.
E/R LED: Error/ Rebuild LED. When there is a failure to
establish a RAID mode combination, and RAID automatically
restores data after replacing the hard disk; this LED will flash
red, indicating that the disk array data is being restored. When
the RAID mode is wrong, this LED will be solid red.