21To install a hard disk drive in the recorder, it is necessary to assemble an HDD unit (encase the hard disk drive in the HDD canister).The HDD unit is designed to easily install/remove the hard disk drive in/from the recorder.Contact your dealer about purchasing, installing, and replacing the hard disk drives.Important:• The HDD unit is a precision device. Handle them with care. Vibration and shocks may cause failure of the HDD unit.• Before transportation, read "HDD unit holding bracket" (this page) and "When you transport the recorder" (☞ Page 22).• Do not move or install this product just after turning the power on or off (for around 30 seconds.) The hard disk drives arerunning.• Install the HDD units in order starting with disk slot 1.• Once the operation has started in RAID1*, RAID5* or RAID6* mode, do not change the position of the HDD unit. If they arechanged, it may become impossible to read recorded data.* Refer to Operation/Settings of the Operating Instructions for RAID mode.HDD unit holding bracketThe recorder has the "HDD unit holding bracket" in the HDD unit slot, screwed in at the factory before shipment. To install theHDD unit in the recorder, remove the "HDD unit holding bracket" first.The "HDD unit holding bracket" and the screw for fixing the bracket are necessary to prevent the HDD unit from falling off duringtransportation. Keep them properly.How to remove the HDD unit holding bracket① Remove the fixing screw for bracket.② Slide the HDD unit holdingbracket to the right andremove it.HDD unit holding bracket②①HDD unitHandle the HDD units