14Important:• When the USE button of the hard disk on which recording is currently being performed is held down for 2 sec-onds or more while operating the unit in the single mode, recording will be continued on the other disk. In thiscase, some images to be recorded may not be recorded (for several seconds to change the disk for recording).When only the single hard disk is used, recording will stop.• When the USE button is held down for 2 seconds or more while operating the unit in the mirroring mode, the harddisk respective to the held USE button will be unmounted and the MIRROR indicator will light red.• When operating the unit in the mirroring mode, two hard disk drives to be used should be the same size.• When the unit is in the process of the SD memory data obtainment, it is impossible to mount or remove the harddisk drive.• When the following operation is being performed, it is impossible to add or remove the hard disk drives.• Auto camera registration ("Quick" – "Camera Auto Registration")• Camera search ("Camera" – "Camera Search")• Remove the hard disk drive after confirming that the USE button is not being lit nor blinking. Otherwise, data onthe disk may be damaged.Format (initialize) the hard disk drive (in the single mode)Format the hard disk drive as follows when using the unit in the single mode.z Open the front cover and confirm that theUSE button is blinking green (indicating thatthe hard disk drive is mounted).x Hold down the FORMAT button respective tothe hard disk drive to be formatted for 5seconds or more.→ Formatting of the hard disk drive will start. (Thecorresponding FORMAT button will start blink-ing green.)When completing the formatting, the FORMATbutton will go off and the respective USE buttonwill light green.Important:• Refer to page 11 for how to format the hard disk drives when operating the unit in the mirroring mode.• Only the mounted hard disk drive can be formatted when operating in the single mode. It is impossible to formatan unmounted hard disk drive or a hard disk drive that is in the process of mounting.• The hard disk drive for which the write protection is on cannot be formatted.• When the unit is in the process of the SD memory data obtainment, it is impossible to switch the operationalmode from the single mode to the mirroring mode.• When the following operation is being performed, it is impossible to format the hard disk drives.• Auto camera registration ("Quick" – "Camera Auto Registration")• Camera search ("Camera" – "Camera Search")• When formatting the hard disk drives in the mirroring mode, connection to the FTP server and sending mails areunavailable.MIRROR indicatorUSE button(with the indicator)FORMAT button (with the indicator)LINK/ACTHDD2HDD1ALARMSUSPENDALARMBUZZERSTOPERROR MIRRORTIMERRECOPERATEHDD1HDD2FORMATUSEUSE FORMAT