I noticed that the HDD1 and HDD3 "Health/Access" LEDs will remain "red" for a very short time when the RAID System is recognizing the hard drives at the beginning. Is there anything wrong?

As soon as the Unit is turned on, the HDD "Connection" LEDs should blink in white. However, if the HDD "Health/Access" LEDs happen to blink or flash in red for a very short time, there shouldn't be any concerns. When the Raid System is in operation, the HDD "Connection" LEDs will flash in blue and the HDD "Health/Access" LEDs will remain in white accordingly, both indicating "data access".