Acer AT310 F1 - Manual (Page 49)

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• The recommended HDD installation order is from bottom to top.
Determining the drive status
Each HDD carrier features two status LED indicators 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.
Description
Green Red
Onboard SATA or RAID card without SGPIO support
HDD present On Off
HDD access Blink Off
LSI RAID card with SGPIO support
HDD present no access On Off
HDD access Blink Off
HDD failure On On
HDD removal Off Off
HDD insertion and rebuilding Blink (1 Hz)
HDD locate Blink (4 Hz)
0
2
1
3