Panasonic Extension Unit Wj Hde300 Operating Instructions

							Before attempting to connect or operate this product,
please read these instructions carefully and save this manual for future use.
Extension Unit
Instructions
Model No.WJ-HDE300
WJ-HDE300Extension Unit 
						

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The serial number of this product may be found on the rear
of the unit.
You should note the serial number of this unit in the space
provided and retain this book as a permanent record of your
purchase to aid identification in the event of theft.
Model No. WJ-HDE300
Serial No.
The lightning flash with arrowhead sym-
bol, within an equilateral triangle, is
intended to alert the user to the pres-
ence of uninsulated dangerous voltage
within the products enclosure that may
be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilat-
eral triangle is intended to alert the user
to the presence of important operating
and maintenance (servicing) instructions
in the literature accompanying the appli-
ance.
Power disconnection. Unit with or without
ON-OFF switches have power supplied to
the unit whenever the power cord is insert-
ed into the power source; however, the unit
is operational only when the ON-OFF
switch is in the ON position.  The power
cord is the main power disconnect for all
units.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SA 1965
SA 1966
NOTE: This equipment has been tested and found to com-
ply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to pro-
vide reasonable protection against harmful interference
when the equipment is operated in a commercial environ-
ment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communications.
Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be
required to correct the interference at his own expense.
FCC Caution: To assure continued compliance, (example -
use only shielded interface cables when connecting to com-
puter or peripheral devices). Any changes or modifications
not expressly approved by the party responsible for compli-
ance could void the user’s authority to operate this equip-
ment.
For U.S.A.
WARNING:
• To prevent fire or electric shock hazard, do not expose this appliance to
rain or moisture. The apparatus shall not be exposed to dripping or
splashing and that no objects filled with liquids, such as vases, shall be
placed on the apparatus.
• All work related to the installation of this product should be made by
qualified service personnel or system installers.
CAUTION:
•Read the label on the rear of the unit for identification of this product,
and the power ratings.
This Class A digital apparatus complies with canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme
NMB-003 du Canada.
For Canada 
						

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■Important Safety Instructions
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturers instructions.
8) Do not use near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider
than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are
provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the
obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the points
where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-overs.
13) Unplug this apparatus during lightning storms or when unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way,
such as power-supply cord or plug is damaged, liquid has been spilled or objects fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate normally, or has been dropped.
S3125A 
						

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Contents
■Important Safety Instructions  .................................................................................................................. 3
■General ................................................................................................................................................... 5
■Precautions ............................................................................................................................................. 5
■Appearance ............................................................................................................................................ 6
■Replacing/Mounting HDDs  ..................................................................................................................... 9
■Connections ............................................................................................................................................ 14
■Rack Mounting ........................................................................................................................................ 16
■Troubleshooting ...................................................................................................................................... 18
■Specifications ......................................................................................................................................... 19
■Accessories ............................................................................................................................................ 19 
						

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■Precautions
•Do not operate the appliance beyond its specified tem-
perature, humidity or power source ratings. 
Do not use the appliance in an extreme environment
where high temperature or high humidity exists. Use the
appliance at temperatures within +5 °C to +45 °C (41 °F
to 113 °F) and humidity below 85 %.
The input power source for this appliance is 120 V AC
60 Hz. 
•Avoid shock and vibration
Shock or vibration may damage the HDD.
The HDDs are fragile especially when the HDD motors
are revolving and the HDD POWER indicator lights. Be
sure to turn off either switch: the POWER switch on the
rear panel, or the HDD POWER switch inside the front
lid: before you mount the unit into a rack or dismount it. 
Do not move the HDD for 30 seconds after turning off
the power.
•Pay attention to static electricity
Put your hand on a metallic surface to discharge static
electricity before installation.
Do not touch components mounted on the HDD directly
with your hand.
Hold only the two sides of the HDD when installing.
■General
The extension unit WJ-HDE300 can contain up to four hard disk drives per unit to add available disk space to the digital disk
recorder WJ-HD316/WJ-HD309. Up to seven extension units can be connected to a digital disk recorder. The units can be
operated in RAID level 5* mode for high tolerance to disk error.
*RAID level 5 (Redundant Arrays for Independent Disks, independent data disks with distributed parity blocks)
RAID level 5 regards 3 or more drives as one drive, and it is possible to read data by automatically attaching error correc-
tion data even though one of the drives is broken. (It is impossible to read data if 2 or more drives are broken.)
RAID level 5 requires a minimum of 3 drives to implement.
When using the RAID function, logical disk size of the extension unit will be as below.
Logical disk size = Smallest size of the disk among the disks in the extension unit x (Number of the disks in the extension
unit - 1)  The actual space may be several percent lower than the logical space.
*Important
When set to RAID level 5, the digital disk recorder will not access the HDD preinstalled in it, but will access only the HDDs
in the extension unit.
•Avoid condensation on the surface of the HDD. 
If this happened, do not turn on the power of the appli-
ance and leave the appliance for around 2 hours.
Wait until the dew evaporates in any of the following
cases.
• The appliance is moved to a place significantly dif-
ferent in temperature or humidity.
• The appliance is moved out from an air-conditioned
room.
• The appliance is placed in an extremely humid
place.
• The appliance is placed in a room where a heater
has just been turned on.
•Consumable parts
Contact your dealer about replacement when the time
comes. 
A hard disk drive needs replacing after a certain length
(depends on the model) of operation.
Cooling fans also need replacing after around 
20 000 - 30 000 hours of operation.
•Do not block the ventilation opening or slots on the
cover.
To prevent the appliance from overheating, place it at
least 5 cm (2 inches) away from the wall. 
•Avoid placing the unit on an inclined surface.
Otherwise, malfunction or damage to the disk may
occur. Place the unit horizontally. 
						

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■Appearance
●Front View
qError indicator [ERROR]
Lights when an error occurs. Refer to TROU-
BLESHOOTING for details.
Red:System error
Orange:Thermal error or malfunction of the cooling fan.
wHDD power indicator [HDD POWER]
ON:
Indicates that HDDs are powered.
OFF:Indicates that the HDDs are not powered.
Note:Do not move the unit until the motors of the HDDs
stop completely. To stop the motors, turn off the
HDD POWER switch behind the front cover. Move
the unit after confirming that the indicator has gone
out.
eOperate indicator [OPERATE]
Lights green when turning on the power switch on the
rear panel.
rHDD access indicators [HDD 1] [HDD 2] [HDD 3] 
[HDD 4]
Each indicator lights to indicate the status of the
respective HDD.
Green:Indicates that the respective HDD is running
normally.
Red:Indicates that the respective HDD is the first faulty
drive among the HDDs in the unit.
Red blink:Indicates that the respective HDD is the
second or subsequent faulty drive among the HDDs
in the unit.
Orange-red alternate blink/Orange:Indicates that the
respective drive is currently being recovered in
RAID level 5 mode.
These indicators normally indicate the status of the
respective drive, but they work as a set when a system
error occurs. Refer to Troubleshooting for further infor-
mation.
Important
When one of the indicators lights red, replace the
respective HDD immediately. If two or more indicators
light/blink red, it will be impossible to recover data.
There may be cases where it is eventually impossible to
recover data if two drives are coincidentally damaged
or the second drive fails during the data recovery
process.
tFront cover
Detach the front cover when it is necessary to install
HDDs or to operate the switches inside the unit.
ERROR
HDD 1 HDD 2 HDD 3 HDD 4
HDD
POWER
OPERATE
Extension UnitWJ-HDE
qwe r t 
						

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POWER
AC  IN
SIGNAL GND
1 2 IN OUTEXT
yu ii
o
!0
!1
!2
●Rear View
ySerial in connector [IN]
Connect the WJ-HD300 series digital disk recorder or
other extension unit with the supplied serial cable.
uSerial out connector [OUT1] [OUT2]
Connect another extension unit with the supplied serial
cable.
iCooling fan
oSignal GND terminal [SIGNAL GND]
Connect this terminal to the SIGNAL GND terminal of
other equipment to avoid possible grounding loop and
noise if required.
!0Power switch [POWER]
Turn on the power of the unit with this switch before
turning on the power of the digital disk recorder, or turn
them on simultaneously. Otherwise, the HDDs will not
be mounted.
When turning off the power of the unit with this switch,
turn off the power of the digital disk recorder first, and
then turn off the power of this unit after confirming that
all HDD access indicators are not lit or blinking.
!1AC inlet [AC IN]
Connect the supplied power cord.
!2Cable clamp fixing hole 
						

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!3
!4
!5
!6
SINGLE    RAID5MODERESET
HDD POWER
RECOVER
OFF            ON
w’
e’ q’
● Inside the Front Lid
qError indicators
Functions as same as that on the front panel.
Red:System error
Orange:Thermal error or malfunction of the cooling fan.
wHDD power indicator 
Functions as same as that on the front panel.
ON:Indicates that HDDs are powered.
OFF:Indicates that the HDDs are not powered.
eOperate indicator 
Functions as same as that on the front panel.
Lights green when turning on the power switch on the
rear panel.
!3Reset button [RESET]
This button is located inside the unit. To access this
button, it is necessary to detach the front cover. Press
this button using a small screw driver (not supplied).
•When SINGLE is selected
After adding or replacing any of the HDDs, press this
button only. Refer to page 11 and 12 for details.
•When RAID 5 is selected
This button is used in combination with the RECOVER
button and MODE switch after adding or replacing any
of the HDDs. Refer to page 11 and 12 for details.
Important
Do not press the RESET button and the RECOVER
button simultaneously when SINGLE is selected.
Otherwise, the setting of the digital disk recorder
may be initialized and it may cause a malfunction.
!4Mode switch [MODE]
RAID 5:
Applies RAID level 5 mode (striping at the byte
level also stripe error correction information). 
SINGLE:Applies SINGLE mode (no striping across dri-
ves for data or error correction information). 
Default
positionImportant
•Changing the MODE switch will not be accepted when
the ERROR indicator lights red and/or when HDD 1-4
indicate a system error status by lighting red and
orange. When this happens, ask your dealer to solve
the error.
•When set to RAID5, the HDD preinstalled in the digital
disk recorder will not work. Instead, it is applied only to
the HDDs installed in the extension unit and the digital
disk recorder will perform storage and readout of the
image data by accessing the extension unit.
•The position of the MODE switch of all units in a system
must be the same. 
•The available disk space of the unit can be logically
calculated as follows. The actual space may be several
percent lower than you calculated depending on the
HDD type used and their combination. The most effi-
cient way is to use the same type drives.
When SINGLE is selected, it will be the sum of all
the HDD sizes.
When RAID 5 is selected, it will be as follows.
When 3 HDDs are in the unit: It will be double the
size of the smallest HDD size. 
When 4 HDDs are in the unit: It will be triple the size
of the smallest HDD size. 
For example, if 4 HDDs of 80 GB, 120 GB, and two
160 GB are mounted, the available disk space will
be 80 G x 3 = 240 GB.
!5HDD power switch [HDD POWER]
Use this switch in the ON position for normal operation.
ON:Supplies the power to the HDDs and the HDD
power indicators will light. 
Default position
OFF:
Does not supply the power and the HDD power
indicators will go off. 
!6Recover button [RECOVER]
Use this button with the RESET button after replacing
HDDs used in the RAID 5 mode to start data recovery.
Refer to page 12 for details. 
						

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■Replacing/Mounting HDDs
Up to four HDDs (locally procured) can be installed in an
extension unit.
The HDDs should be installed in the proper positions in
order as shown above. Do not skip or reverse the order of
the HDD positions. 
Important
•The position of the MODE switch of all units in a system
must be the same. 
•When set to RAID5, the digital disk recorder will not
access the HDD preinstalled in it, but will access only
the HDDs in the extension unit.
•Refer to the dealer for the compatible HDDs with this
unit.
•The replaced/added HDDs will be formatted.
SINGLE mode:Only the replaced/added HDD will be
formatted. For example, when the HDD
4 of the extension unit 2 is replaced,
only the HDD4 of the extension unit 2
will be formatted.
RAID 5 mode:All HDDs of the extension units will be
formatted when a new HDD is added or
a preinstalled HDD is removed. For
example, when the HDD 4 of the exten-
sion unit 2 is added, all  HDDs of the
extension unit 2 will be formatted.
•Data readout will not be performed when the HDD posi-
tions are changed after once the system has been
operated.
●Procedures
1.HDD power-off procedures
Perform either of the following procedures depending
on the installation situations to stop the HDD motors.
Important
If turning off the POWER switch of a unit, the latter units
may not work because of interrupted data transmission.
Case 1:When the rear of the units is accessible, turn off
the power switches of the digital disk recorder
and extension units, then detach all the power
plugs from the outlets.
Case 2:When the rear of the units is inaccessible, for
example mounted in a rack, open the setup
menu of the digital disk recorder and set the
HDD safety modeto ON (default position). The
extension units will turn to the HDD power-off
mode. 
Refer to the Operating Instructions included with
the digital disk recorder for details on it.
2.Detach the front cover and the front panel.
2-1 Remove the two screws.
HDD 2
HDD 1HDD 4
HDD 3
POWER
2 - 1 
						

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2-2 Slide the front cover to the left.
2-3 Pull the front cover toward you.
2-4 Disconnect the harness.
2-5 Remove the six screws (marked with ∆) and detach
the thin metal plate covering the front side.
2-6 Disconnect the cables when adding or replacing
the HDD.3.Remove two of the HDD mounting brackets.
•Remove the four screws and pull the brackets toward
you.
•When replacing an HDD, remove it from the bracket.
4.Prepare the HDDs to be fixed on the brackets.
•Release the static electricity from your body before
touching the HDDs.
•Put the conductive bag (in which the HDD was packed)
on a soft surface and place the HDD on it with the cir-
cuit board side down. 
5.Fix the HDDs on the brackets.
5-1 Slide the HDD onto the bracket.
5-2 Tighten the four screws (supplied) to fix the HDD on
the bracket.
5-3 Repeat above steps to fix all the HDDs on the
bracket.
Do not use an electric screwdriver to fix them.
Recommended tightening torque = 0.49 N · m 
{5 k
gf·cm}
6.Set all the HDDs as master using the jumper connector.
Note:This setting is subject to change without notice.
Refer to the diagram attached on the HDD or the
operating instructions of the HDD for the jumper
connector assignment.
2 - 4
2 -5
2 - 6
2 - 2
2 - 3
2 - 3