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4) HDD internal connection
Master x 1 Master x 1 / Slave x 1
Master x 1 / Slave x 1 CD-RW Master x 1 / Slave x 1
Master x 1 / Master x 1 CD-RW Master x 1 / Master x 1
Slave x 1 / Slave x 1 Slave x 1 / Slave x 1
Notice:
-Hard Disk Master and Slave jumper pin must be right, otherwise DVR will show fault.