Acer AR180 F1 - Manual (Page 47)

29
Determining drive status
Each HDD carrier features two status LED indicators (see page 3) to
display the hard drive status. If you are replacing a failed HDD,
determine which drive has failed by checking the hot-plug HDD status
indicators.
3.5” HDD
Description
Onboard SATA RAID
HDD present no access Off Off
Red
HDD access Blink
Blue
Off
RAID add on card with SGPIO support
HDD present no access SAS: On
SATA: Off
HDD access Blink
HDD failure On
HDD removal Off Off
HDD insertion and rebuilding Blink 1Hz
HDD locate Blink 4Hz