Using the Front Panel for Operations2412 Close the front cover of the extension unit and lock it bylightly pressing and turning the key to the left.• Keep the key in a safe place.13 Check the disk information.Check the following content related to the HDD under [Diskinformation] on the settings menu of the network diskrecorder. Refer to the network disk recorder's SetupInstructions (PDF file) for more information.• HDD capacity• HDD remaining capacity• Hour meter• Disk operation mode• Date range of video recorded on the HDDNote:• HDDs cannot be added while in RAID5 or RAID6 mode.The RAID function will not start even if an HDD is installed(linked) in an empty disk slot.• HDDs can be installed as a complete extension unit whileRAID5 or RAID6 is running.All the HDDs in one extension unit can be linked to operate at thesame time.Also, refer to the network disk recorder's Installation Guide.1 Install the HDD unit in the extension unit.Install the HDD according to steps 1 to 2 in Installing HDDs(Installing HDDs (page 23)).Repeat steps 1 to 2 to install multiple HDD units.Note:• When installing HDD units, each HDD unit must be recognized.(Follow Step 1 and 2)Additional HDD units will not be recognized while the first unit isbeing recognized.2 The HDD is automatically recognized.• While the HDD is being recognized, the HDD statusindicator blinks orange.Once the HDD is recognized, the HDD status indicatorlights green or blinks.• The HDD is automatically formatted if it is notpreformatted.The HDD status indicator lights green after formatting iscomplete.• Preformatted HDDs are recognized for playback only. Inthis case, the HDD status indicator blinks green. Followthe instructions from step 3 to use the HDD for recording.The following operations are done on the networkdisk recorder after the HDD is recognized by theextension unit.3 Press the [USE] button for over 2 seconds.A buzzer sounds.Press the front panel buttons according to the directions onthe LCD.4 Press the arrow buttons (up or down) on the front paneluntil [HDD Operation] appears on the screen.5 Press the [SET] button.6 Press the arrow buttons (up or down) on the front paneluntil [Link EXT] appears on the screen.(2)(1)Installing HDDs by unit