Troubleshooting

Diagnosis by HDD indicators

In the case that the HDD 1 or HDD 2 indicator on the front panel blinks or illuminates, check the problem in the HDD according to the chart below.

START

Both indicators of HDD 1 and HDD 2 illuminate red.

Yes

Both of the HDDs are not identified. The S-ATA cable may not be connected properly or a problem may occur in the HDDs.

Both indicators of HDD 1

and HDD 2 blink red.

Yes

Is the operation mode

set to mirroring?

Yes

Is the MODE rotary switch set

correctly?The HDDs of different capacities may be used. Check the HDD capacity.

	Either indicator of HDD 1	Yes
	or HDD 2 illuminates red	Yes


	and the other one blinks
	red.

Either indicator of HDD 1	Yes
or HDD 2 illuminates red.
or HDD 2 illuminates red.

Is the MODE rotary switch set correctly? Is the cable connected correctly?

Is the operation mode

set to spanning or

mirroring?

Spanning

The HDD corresponding to the illuminating indicator is not identified. The S-ATA cable may not be connected properly or a problem may occur in the HDDs.

Is the operation mode

set to mirroring?

Mirroring

During synchronization, a problem occured in the source HDD and that HDD became unidentifiable.

The synchronization cannot be continued.

Yes

Though the HDD corresponding to the illuminating indicator is not identified, operation can be continued. The S-ATA cable may not be connected properly or a problem may occur in the HDDs.