Appendix B HDD Capacity Calculation | Q-See QSD42908 specification

QSD42908 User’s Manual

Appendix B: HDD Capacity Calculation

To calculate total capacity needed by each DVR according to video recording (video recording type and video file storage time).

Step 1: Use Formula (1) to calculate storage capacity qi that is the capacity of each channel

needed for every hour: unit Mbyte.

.

qi = di ¸ 8 ´ 3600 ¸1024

(1)

In the formula: di means the bit rate, unit Kbit/s

Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the storage capacity mi , which is storage of each channel needed unit Mbyte.

	mi = qi × hi × Di	(2)
	In the formula:
hi	Represents the recording time for each day (hour)
Di	Represents number of days for which the video shall be kept
Step 3: Use Formula (3) to calculate total capacity (accumulation) qT		that is needed for all
channels in the DVR during scheduled video recording.

c

qT = åmi

i =1

In the formula: c represents total number of channels in one DVR

Step 4: Use Formula (4) to calculate total capacity (accumulation) qT that is needed for channels in DVR during alarm video recording (including motion detection).

(3)

all

c
qT = åmi ×a%	(4)

i =1

In the formula：a% means alarm occurrence rate

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Q-See QSD42908 user manual Appendix B HDD Capacity Calculation, = d i ¸ 8 ´ 3600 ¸1024

Contents

QSD42908 Net DVR User’s Manual V2.1 Index Chapter Chapter Website Customer Service Summary FeaturesProduct Introduction Network function Others Installation Checking the DVR and Its AccessoriesInstallation notice Installation instrument Rear Panel Description QSD42908 Rear panel Index Type Name Description Operational InstructionsFront Panel Ready IR Remote Control Index Name Description Starting the Remote Control Disabling the Remote ControlPowering Down the DVR If Remote Control Does Not Work Menu Description How to enter into menu mode Main Menu Description QSD42908 User’s Manual How to exit menu Input text Preview Power onBasic Operation Guide Recording status Form 4-1 Camera record status Icon Icon Color Status Description Alarm status Change Password User name and passwordLogin QSD42908 User’s Manual PTZ Pan/Tilt/Zoom Control PTZ Control Interface Adjust Preset Description Start/Stop Auto in PTZ Control ModeSelect Channel PTZ Control Keys Description Description Exit PTZ Control ModeManual Record Playback Playback Interface Description Playback With Mouse Attached Control Bar Functions Backup Recorded Files Backup Daily Recorded Files Select backup device Shutting down the DVR normally Using menu Using【POWER】key of front panel or IR remote control Password modification Parameters Setup GuideAdministrator and Password User management Enter into User Management menu shown in fig Add and Delete UserAdd user Add new user name Setup the password for new userSetup the rights for new user Save the new user’s password and rights User rights description Local Delete user Remote through network or internetMAC address Device ID Unit Name and Device IDUnit name Video Output Standard and VGA Setup Camera name and OSD On Screen Display SetupVGA setup Video output standard Camera Name Position System Time Date OSD Position Video Parameters Setup Mask Area Setup Disable the mask check box means cancel the mask area View Tampering Alarm Enter into Camera menu Video Loss Alarm QSD42908 User’s Manual Motion Detection Interface shown as fig Clear motion area QSD42908 User’s Manual Preview Properties Recording Setup Preview properties Recording menu description Bit Rate Type Record type All day recording setup Enter into recording schedule menuSelect a day and enable all day recording option Select one day and disable all day recording option Setup time period and record typeCopy to other days Save External Alarm Input and Relay Output External alarm input setupAlarm type Enter into Alarm in Handling sub menu Alarm trigger record channel setup Schedule for alarm handle methodAlarm handle method Save setup PTZ Linkage Alarm relay output setup Select delay timeEnter into alarm out schedule Setup alarm out schedule Exceptions Network Parameters Network menu description Advanced setup description PPPoE DVR supports PPPoE dail-up function Accessing the DVR over a network Accessing the DVR from a remote computer PTZ Pan, Tilt, Zoom PTZ menu description Preset setup Sequence setup Cruise setup 18 RS232 setup RS232 menu description Setup at DVR end Example PPP Modem passive dialup through Pstn Setup should pay special attention to QSD42908 User’s Manual Establish the dialup connection Restore Parameters Utilities Upgrade Stop Alarm Out RebootPower Off Hard Disk Management View Log By Type By Type&Date For example The steps of viewing alarm logBy Time System Information Firmware Upgrade FTP Server Setup Setup username Upgrade Mode QSD42908 User’s Manual QSD42908 User’s Manual QSD42908 User’s Manual Step Step Appendix a Mouse Control Function Test input interface Scroll wheel forwardPlaylist interface User interface Appendix B HDD Capacity Calculation = d i ¸ 8 ´ 3600 ¸1024 How to Make a RS-485 Connect Cable Appendix C DVR Connect Cable DefinitionMaterial and tool RJ45 introduction Pin definition How to Make a RS-232 Connect Cable How to Make a UTP network Connect Cable Corresponding relationship of cross cable Appendix D Specifications PAL 15FPS, Ntsc 20FPS Appendix E Troubleshooting Failure Possible reasons Appendix F Product Service & Warranty Appendix G Customer Information Card 100