Huge Systems MediaVault U320-R User manual

Huge MediaVault
U320-R
User’s Guide
Document number 800007 rev C1.

Page 2 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Copyright ©2003, 2004 Huge Systems Inc.
All rights reserved. Printed in the U.S.A.
U320-R, U320-S DualMax, U320-S Max, Huge MediaVault Max, HDTV RAID, SDTV RAID, U320-R,
Huge Systems name and logo are registered trademarks of Huge Systems Inc.
All other trademarks are the property of their respective holders.
Specifications and procedures in this document are subject to change without notice.
Published by: Huge Systems Inc.

800007 rev C1 Huge Systems U320-R User’s Guide Page 3 of 28
Table of Contents
Thank You.............................................................................................................................................................................. 4
Features and benefits....................................................................................................................................................... 4
Les Considérations importantes de Sûreté ...................................................................................................................... 5
Wichtige Sicherheitsberücksichtigungen.......................................................................................................................... 5
Important Safety Considerations...................................................................................................................................... 6
Agency Approvals............................................................................................................................................................. 6
Model Numbering............................................................................................................................................................. 6
Specifications ................................................................................................................................................................... 7
Technical Support.................................................................................................................................................................. 7
Serviceability .................................................................................................................................................................... 7
Firmware Update.............................................................................................................................................................. 7
Getting Started....................................................................................................................................................................... 8
Unpacking......................................................................................................................................................................... 8
Check List......................................................................................................................................................................... 8
Editing System Requirements.......................................................................................................................................... 8
Hardware Installation and configuration ................................................................................................................................ 9
SCSI Host Adapters ......................................................................................................................................................... 9
Rear View....................................................................................................................................................................... 10
POWER IN ..................................................................................................................................................................... 10
POWER.......................................................................................................................................................................... 10
SCSI ID........................................................................................................................................................................... 10
MODE Selection (RAID Level) ....................................................................................................................................... 11
Double Beep ............................................................................................................................................................. 12
MODE SET / REBUILD Button....................................................................................................................................... 13
SCSI connections........................................................................................................................................................... 13
Host connections....................................................................................................................................................... 13
Terminator................................................................................................................................................................. 13
Daisy chaining........................................................................................................................................................... 14
DIAG - Diagnostic Port................................................................................................................................................... 14
Front View - Indicators......................................................................................................................................................... 15
POWER.......................................................................................................................................................................... 15
RAID 3............................................................................................................................................................................ 15
D1 to D5 ......................................................................................................................................................................... 15
U320............................................................................................................................................................................... 15
U160............................................................................................................................................................................... 15
SERVICE........................................................................................................................................................................ 15
Audible Alarm....................................................................................................................................................................... 16
6 Rapid Beeps During Boot Time................................................................................................................................... 16
6 Rapid Beeps During Normal Operation....................................................................................................................... 16
Slow Beeps..................................................................................................................................................................... 16
Constant Solid Beep....................................................................................................................................................... 16
Drive Replacement .............................................................................................................................................................. 17
Remove the front panel.................................................................................................................................................. 17
Removing disk drive module .......................................................................................................................................... 17
Rebuilding a down drive (RAID 3 mode only) ................................................................................................................ 17
Formatting and Partitioning.................................................................................................................................................. 18
Macintosh G4 / G5 in OS X............................................................................................................................................ 18
Preparing a single U320-R........................................................................................................................................ 18
Preparing a pair of U320-R (striping)........................................................................................................................ 20
Windows NT Partition / Format....................................................................................................................................... 22
Preparing a single U320-R........................................................................................................................................ 22
Preparing a pair of U320-R (striping)........................................................................................................................ 22
Windows 2000 and XP Partition / Format ...................................................................................................................... 23
Preparing a single U320-R........................................................................................................................................ 23
Preparing a pair of U320-R (striping)........................................................................................................................ 23
Application Notes................................................................................................................................................................. 25
General........................................................................................................................................................................... 25
Video Resolution Data Rates.................................................................................................................................... 25
Hours per Terabyte Table......................................................................................................................................... 25
Macintosh....................................................................................................................................................................... 26
RAID Compatibility.................................................................................................................................................... 26
Windows NT / 2000 / XP ................................................................................................................................................ 27
RAID Compatibility.................................................................................................................................................... 27
MaximumSGList........................................................................................................................................................ 27
ATTO BIOS striping .................................................................................................................................................. 28
End of Document................................................................................................................................................................. 28

Page 4 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Thank You
Congratulations and thank you for purchasing the U320-R product from Huge Systems Inc. a leader in huge
performance, huge quality, and huge cost savings storage product for your video editing and storage
requirements.
Your U320-R storage system utilizes the latest SCSI Ultra320 technology. SCSI Ultra320 affords system
operations at blazing speeds, enabling you to maximize valuable system time and the highest of video
quality for DV to HD resolutions in a single SCSI channel.
Each U320-R contains one RAID controller and five removable disk modules. The U320-R uses the latest
in high performance disk drives and the latest transfer mode, huge throughput per disk drive pumping data
into our RTR (Real Time RAID) engine for fault tolerant and maximum transfer rates, coupled with the
RTC (Real Time Cache) at an internal data rate of 500MBytes/sec, this translates to a huge performance at
the SCSI interface, upward of 320MBytes/sec burst and 200MBytes/sec of sustained data rate with the
U320-R.
Data protection are available with the built-in RAID 3@2k mode. A simple and easy to use Mode Select
switch selects either RAID 0 or RAID 3@2k operation.
If you have any comments, suggestions or questions, please call, FAX or e-mail us. We value input from
the most important people, you our customer.
Again, we thank you.
Features and benefits
• Max Burst Data Rate 320MBytes/sec
• Internal disk rate from 300MB/sec to 130MB/sec.
• Sustained Data Rate 200MBytes/sec per SCSI channel in HDT mode.
• One Ultra320 SCSI channel
• One RAID controller
• RAID 0 or RAID 3@2k
• RTR - Real Time RAID reconstructs data “on the fly” should a drive “glitch”
• HDT - High Definition Turbo mode insures 200 Mbytes per second per channel (with reduction of
capacity).
• Ultra320 SCSI interface. Compatible with Ultra320/Ultra160/Ultra 2/LVD, Single Ended, Ultra Wide,
Fast, SCSI-3, SCSI-2, SCSI interface and protocol.
• Daisy chain of multiple SCSI devices with the built-in in and out SCSI connectors.
• Five high performance removable hard disk drives modules.
• Multiple cooling fans.
• Easy user selection of functionality via Mode Selection and Mode Set switches. No complicated
software setup or maintenance.
• Serial port for detail level maintenance and support.
• Audible Alarm and LED indicators.

800007 rev C1 Huge Systems U320-R User’s Guide Page 5 of 28
Les Considérations importantes de Sûreté
Pas la tentative pour entretenir cette unité. L'ouverture ou enlever la couverture vous exposera aux tensions
dangereuses ou aux autres dangers.
Ne pas utiliser cette unité près de l'eau – tel que; la baignoire, le lavabo, l'évier de cuisine ou le baquet de
lessive, dans un sous-sol mouillé de proche une piscine.
Ne pas placer cette unité sur une charrette instable, une position, un crochet ou une table. L'unité peut
tomber, causant la blessure et les dommages sérieuse à l'unité.
Ne pas bloquer le devant et la ventilation postérieure. Le flux d'air correct est exigé assurer l'opération
fiable et protéger le produit de par-dessus le chauffage.
Ne pas battre le but de sûreté de la prise de courant mettree à terre. Utiliser une sortie de pouvoir qui met à
la terre et l'arrivée secteur a projeté pour l'unité. Le cordon d'alimentation devrait être mis en déroute pour
qu'ils ne sont pas probables être marché sur ou pincé par les articles placés sur ou contre eux.
Le cordon d'alimentation fourni est pour l'usage d'Amérique du nord seulement. Hors de l'Amérique du
nord que le cordon d'alimentation correct doit être procuré et doit être utilisé.
Wichtige Sicherheitsberücksichtigungen
Versuchen Sie nicht, diese Einheit zu warten. Öffnen oder Herausnehmen der Decke werden Sie zu
gefährlichen Spannungen oder anderen Gefahren entblößen.
Benutzen Sie dieses Einheit nahes Wasser nicht – wie zum Beispiel; Badewanne, washbowl, Küche
Ausguß oder Wäscherei Wanne, in einem nassen Kellergeschoß von nahe einem schwimmenden Teich.
Stellen Sie diese Einheit auf einen unsicheren Wagen, Gestell, Bügel oder Tisch nicht. Die Einheit kann
fallen, verursachend ernste Verletzung und Schaden an der Einheit.
Hemmen Sie die Front und die hintere Belüftung nicht. Passender Luftstrom ist erfordert, zuverlässigen
Betrieb zu sichern, und, das Produkt von über Heizung zu schützen.
Besiegen Sie den Sicherheitszweck Stöpsel der Erdungskraft nicht. Benutzen Sie einen Erdungstyp
Netzanschluß und den Kraft Verbinder haben vorgehabt für die Einheit. Das Netzkabel sollte umgeleitet
werden, damit sie nicht wahrscheinlich sind, auf gelaufen zu werden, oder zusammengedrückt durch
Punkte, die auf oder gegen sie gestellt werden.
Netzkabel hat für Nördlich Amerika Gebrauch nur versorgt ist. Außerhalb Nördlich Amerikas des
passenden Netzkabels muß verschafft werden und muß benutzt werden.

Page 6 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Important Safety Considerations
Do not attempt to service this unit yourself other than the removal of the front panel and the disk drive
modules. Opening or removing the top, rear and side covers will expose you to dangerous voltages or other
hazards.
Do not use this unit near water – such as; bathtub, washbowl, kitchen sink or laundry tub, in a wet
basement of near a swimming pool.
Do not place this unit on an unstable cart, stand, bracket or table. The unit may fall, causing serious injury
and damage to the unit.
Do not block the front and rear ventilation. Proper airflow is required to ensure reliable operation and to
protect the product from over heating.
Do not defeat the safety purpose of the grounding power plug. Use a grounding type power outlet and the
power connector intended for the unit. The power cord should be routed so that they are not likely to be
walked on or pinched by items placed upon or against them.
Power cord provided is for North America use only. Outside of North America the proper power cord must
be procured and used.
Agency Approvals
This device complies with the following agencies:
FCC class A, TUV, CE , CSA
Model Numbering
The HMVU320-R model numbers are in the following pattern:
HMV - U320 R - (size) (channels)
Where: HMV is the Huge MediaVault.
U320 designate Ultra320 SCSI interface.
R designate the removable drive feature.
(size) is the capacity of the U320-R in Gigabytes in RAID 0 mode.
(channel) M designates Max for a single channel, DM is DualMax for dual channel.
HMV-U320R-1250M would represent 1250 Gigabytes (1.25 Terabytes) of storage in RAID 0 mode.

800007 rev C1 Huge Systems U320-R User’s Guide Page 7 of 28
Specifications
Physical Dimensions: 6 ½” wide x 11” high x 12 ½” deep
Power: Auto switching 100-240 VAC 50-60 Hz
Operating temperature: 5-40 degrees Celsius
Weight (shipping): 20 lbs / 9 Kg
Current draw 117VAC: Start-up 1.0A / 117W
Seek 0.64 / 75W
Idle 0.4A / 47W
Current draw 220VAC: Start-up 0.53A / 117W
Seek 0.34A / 75W
Idle 0.21A / 47W
Technical Support
World Wide Web: e-mail:
www.hugesystems.com [e-mail]
Telephone: FAX:
818-991-1188 818-991-6893
M-F: 8AM – 5PM PST.
Serviceability
The U320-R is designed to provide easy disk drive module replacement. Should a disk drive module needs
to be serviced, simply remove the front cover, identify the bad module, loosen the thumb screws, unplug
the defective drive module and install the new.
Firmware Update
From time to time firmware updates are made available to maintain compatibility with latest software
releases or correct problems. If you are experiencing problems with the MediaVault you might want to go
on-line and visit our web site (www.hugesystems.com) to check for any available firmware download for
the MediaVault.

Page 8 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Getting Started
The U320-R comes pre-assembled and ready to be connected to a SCSI Ultra320 compatible SCSI
interface of your video edit computer equipment right out of the box. Using your computer you will need
to format and/or partition the U320-R before storing data on it.
Unpacking
• Remove all components from the shipping container. Retain all boxes and packing materials in case
you might need to reuse them later.
• Examine the components for shipping damage. Contact the freight carrier immediately if damage
exists.
Check List
• One U320-R – Ultra 320 SCSI External Disk Storage Array.
• One SCSI Ultra320/160/LVD/SE dual mode terminator.
• One SCSI Ultra320 compatible interface cable.
• One AC power cord (for North America use only).
• One Diagnostic cable.
• This User’s Guide.
Editing System Requirements
• Ultra320 or compatible SCSI host adapters
• Windows 9x/NT/ME/2000,XP, Mac OS9.2/X, IRIX, Linux
• Video Capture card
• Video Editing software
• Video player or other source of video input

800007 rev C1 Huge Systems U320-R User’s Guide Page 9 of 28
Hardware Installation and configuration
SCSI Host Adapters
Recommended Ultra 320 SCSI Host Adapters
Ultra320 Apple G4 Apple G5 Intel & Compatibles
Dual Channel
SCSI Adapters ATTO UL4D ATTO UL4D
ATTO UL4D
Adaptec 39320
Single Channel
SCSI Adapters ATTO UL4D ATTO UL4S
ATTO UL4S
Adaptec 29320
Recommended Ultra 160 SCSI Host Adapters
Ultra160 Apple G4 Apple G5 Intel & Compatibles
Dual Channel
SCSI Adapters ATTO UL3D-000 Adaptec 39160 ATTO UL3D-66 Adaptec 39160
ATTO UL3D-000
ATTO UL3D-66
Adaptec 39160
Single Channel
SCSI Adapters ATTO UL3S-000 Adaptec 29160 ATTO UL3S-66 Adaptec 29160
ATTO UL3S-000
ATTO UL3S-66
Adaptec 29160
The U320-R communicates with your computer using the industry standard SCSI Ultra320 interface. You
must have a compatible SCSI Host Adapter installed in your computer to work with the U320-R storage
system. Some computers have a built-in native SCSI port, check your computer for availability.
To maximize the U320-R’s Ultra320 interface, the SCSI Host Adapter in your computer should also be
rated for Ultra320. However, the slower Ultra160, Ultra2 and Ultra Wide SCSI rated host adapters will
work but at a lower transfer rate.
Check to make sure the Host Adapter is physically installed correctly and the appropriate Host Adapter
drivers are loaded and functioning properly before connecting the U320-R to your computer system.

Page 10 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Rear View
SCSI IN – SCSI connector.
SCSI OUT – SCSI connector.
SCSI ID – SCSI ID selection switch.
MODE SELECT – Mode Selection switch.
DIAG – Diagnostic connector.
FAN – Cooling fans.
MODE SET / REBUILD – Mode Selection Set
and Start Rebuild switch.
POWER – Main power switch.
POWER IN – AC Power connector.
POWER IN
The U320-R is equipped with an auto ranging power supply, attach the supplied AC power cord to the
U320-R at the rear and to an AC power source.
POWER
The power switch for the U320-R is located at the rear of the unit. Turn on the U320-R by pressing
flipping the power switch to the ON (1) position, turn it off by flipping the switch to the OFF (0) position.
Turn on the U320-R first, wait 20 seconds then your computer.
SCSI ID
Each SCSI device attached to a SCSI channel must have it’s own unique ID setting. Valid ID for Wide
SCSI are from 0 to 15. Most SCSI host adapters inside your computer typically occupies ID 7. If there are
other SCSI devices on the SCSI channel, ensure that there are no SCSI ID conflicts.
If you are unsure which ID to use and the U320-R is the only device attached to this particular channel of
the host adapter, ID 0 can be used.
To change the value, use a pointy instrument (pointy pen) and press the buttons
just above and just below the number to change it.
The U320-R must be turned off and back on again to make a new SCSI ID setting
take effect.

800007 rev C1 Huge Systems U320-R User’s Guide Page 11 of 28
MODE Selection (RAID Level)
Mode Selection is a unique feature of Huge Systems and it is a convenient way to select the desired
operating mode of the U320-R. No need of complicated software and serial port configuration procedures.
To change the value, use a pointy instrument (pointy pen) and press the buttons
just above and just below the number to change it.
IMPORTANT: Changing the Mode can cause any existing data to be over written.
Make sure any data you want to keep is stored elsewhere before making any changes.
Remove or delete any known partitions before changing the mode, this will keep the OS from getting
confuse due to left over file systems information left on the U320-R.
Consult the RAID Compatibility table in the Application Notes section to ensure proper operation.
RAID *Mode
Select Additional information Capacity HD SD # of
Channels
0 0
Data striped across all five drives of the
RAID controller. Usable storage is the
sum of all five drives. Full 1st
80%  1
3@2k 1
Block size is based on 2048 bytes. Data
striped across four drives plus one drive
for redundant information. Usable storage
is the sum of four drives.
20% less 1st
62% 1
0
Turbo
** 3
Data striped across all five drives of the
RAID controller. This Turbo mode uses
the highest data rate portions of the disk
drives.
20% less 1
3@2k
Turbo
** 4
Block size is based on 2048 bytes. Data
striped across four drives plus one drive
for redundant information. This Turbo
mode uses the highest data rate portions of
the disk drives.
50% less 1
0 0
Use Operating System to stripe across two
channels of HMV. Full 2
3@2k 1
Use Operating System to stripe across two
channels of HMV. Full  2
*Make sure to “Double Beep” to set the mode.
** No need to use the HD Turbo mode in a striped two channel configuration. For a single channel
configuration, the HD Turbo mode ensures the highest data rates are used of the disk drives to provide
sufficient performance required for HD video resolution operation, the trade off is a reduction in storage
capacity. If full capacity AND HD performance is required, the solution is to stripe two channels of the
HMV-U320 using the Operating System stripping utility.

Page 12 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Wipe 6
This mode will start a write operation to
all the disk drives in the array. This is
used to completely wipe out any previous
configuration and settings.
Mfg
Test 7
This mode will over write data on the
HMV U320 as the diagnostic will perform
read and write tests on every drive and on
every block of data. The unit records
vital parameters of each disk drive’s
performance, and it can be retrieved using
the Diagnostic Port for further analysis.
*Make sure to “Double Beep” to set the mode.
Double Beep
As a precautionary measure to protect from un-intentional mode changes. A combination of holding down
the Mode Set Button and turning the unit on must be performed to cause the change.
1) Turn off the computer.
2) Determine the Mode desired and note the Mode Selection value.
3) Set the value on the Mode Selection switch. Use a pointed instrument and press the tiny button
above or below the number window.
4) Turn the power off to the U320-R unit.
5) Press and hold the Mode Set Button.
6) Apply power to the U320-R.
7) Within about 20 seconds you will hear two beeps to confirm the change.
8) Release the Mode Set Button.
9) Turn the computer on.

800007 rev C1 Huge Systems U320-R User’s Guide Page 13 of 28
MODE SET / REBUILD Button
This switch has a dual role function. During power up, it acts as a Mode Set switch and during normal
operation it is used as the Start Rebuild switch.
During the 1st 20 seconds of power up, this switch acts as a Mode Set switch and is used in conjunction
with the Mode Selection option. See the Mode Selection section for additional information.
During normal operation and only when the U320-R is in the RAID 3 modes, this switch is used to start a
drive rebuild process. When a defect drive has been replaced, this rebuild process brings the U320-R back
up to it’s fully protected mode. See Audible Alarm and Drive Replacement sections for additional
information.
SCSI connections
The U320-R have a pair of SCSI 68-pin high density (68HD) connectors. They function as an IN and an
OUT connection with internal loop-through for the SCSI channel. This SCSI channel is compatible with
Ultra320, Ultra160, Ultra2, and other SCSI standards. HVD (High Voltage Differential) is not supported.
Host connections
Use a Ultra320 rated SCSI cable to connect the SCSI channel to your host computer. Connect the SCSI IN
of the U320-R to the SCSI channel of the computer.
Terminator
Use a Ultra320 rated SCSI terminator to terminate the SCSI connection. Connect the terminator to SCSI
OUT.
U320-R Editing Computer
SCSI IN
SCSI OUT SCSI
Host SCSIconnections and terminations
Install
Terminator

Page 14 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Daisy chaining
If you have multiple SCSI devices to connect, they can be daisy chained together as shown. At the back of
the U320-R you will have at the SCSI IN connector a SCSI cable connected to your host computer, and at
the SCSI OUT connector a SCSI cable connected to your other SCSI device.
Keep in mind that all connected SCSI devices must be rated at and configured to run at Ultra320 for
maximum data transfer, mixing slower devices such as Ultra2, Ultra Wide, narrow SCSI, etc… could
reduce the data transfer rate to the slowest device on the SCSI channel.
Please ensure that 1) the total SCSI cable length are kept as short as possible (Maximum 12 meters); 2)
remember to use a terminator at the end device of each SCSI chain; 3) No duplicated or SCSI ID conflict
on any particular SCSI channel.
Do not exceed maximum of four devices in a chain to ensure SCSI data transfer reliability.
Editing Computer
SCSI IN
SCSI OUT
SCSI
2nd U320-R
Daisy Chain additional U320-R
Terminator or to
other SCSI
device
SCSI IN
SCSI OUT
1st U320-R
SCSI
ID11
SCSI
ID10
DIAG - Diagnostic Port
A serial Diagnostic Port cable is supplied to enable future firmware download and any special diagnostic
requirements. Under normal operating circumstance there is no need to hookup the serial port.
Should you have any need to journey into the Diagnostic Port, please call our Technical Support
Department and they will be happy to assist you.

800007 rev C1 Huge Systems U320-R User’s Guide Page 15 of 28
Front View - Indicators
POWER –Power On and Ready indicator.
RAID 3 – RAID 3 mode in operation.
D1 to D5 – Drive activity or fault.
U320 – SCSI in Ultra320 mode.
U160 – SCSI in Ultra160 mode.
SERVICE – Service required.
POWER
On solid indicates unit is powered up and ready for operation. This indicator will flash rapidly during
initial power on self test for 20 seconds.
RAID 3
Indicates the U320-R is operating in a RAID 3 protected mode. See the Mode Selection section for
additional RAID level information. When this indicator if off, U320-R is operating in RAID 0 (un-
protected) mode.
D1 to D5
Drive activity indicators or drive fault indicator. The indicators will blink as the disk drives are being
accessed. Indicators will be off when there are no drive accesses.
In a fault condition, associated with the SERVICE Indicator and an audible alarm, the faulty drive is
identified by a slow blinking drive indicator.
U320
On indicates the SCSI interface is operating at it’s optimum SCSI Ultra320 speed. If this indicator and the
U160 speed indicator are off, the U320-R is operating at less than Ultra160 speed.
U160
On indicates the SCSI interface is operating in SCSI Ultra160 speed. If this indicator and the U320 speed
indicator are off, the U320-R is operating at less than Ultra160 speed.
SERVICE
If this indicator is lit, the U320-R requires help. Normally this is associated with an audible alarm and one
of the drive indicator will be flashing slowly. A drive replacement might be necessary. See Audible Alarm
section.

Page 16 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Audible Alarm
The U320-R will sound an alarm if there is a problem with the RAID operation. Corrective actions can be
applied to rectify the problem.
6 Rapid Beeps During Boot Time
6 rapid beeps during boot time is normally associated with SCSI cabling, SCSI termination, or power up
sequence related. Always turn on the U320-R first, then turn on the computer. You might need to
physically remove and re-insert the SCSI connectors and terminators along the SCSI path, this includes the
connectors at the SCSI controller, and at the U320-R.
Check to ensure there are no other SCSI devices on the bus using the same SCSI ID address.
Try removing any other SCSI devices that shares the same SCSI bus as the U320-R, leaving just the U320-
R as the only SCSI device will help to identify if there is a conflict with other devices.
6 Rapid Beeps During Normal Operation
6 rapid beeps during normal operation indicates either there is a SCSI interface issue or a disk drive in the
U320-R has timed out. Check to ensure all SCSI connections are securely in place You might need to
physically remove and re-insert the SCSI connectors and terminators along the SCSI path, this includes the
connectors at the SCSI controller, and at the U320-R.
Slow Beeps
One or more slower beeps indicate a bad drive or an intermittent drive, the number of beeps indicates
which drive is having problems. When operating in RAID 3@2K mode the U320-R is still available for
normal operation without performance degradation, but the beeps indicate that a drive is down and you are
running without RAID 3 protection. Should another drive fail your are in danger of loosing data.
Constant Solid Beep
This would indicate a drive is down. The SERVICE indicator should also be on. One of the drive indicator
should exhibit a slow blink (one second on then one second off). This drive needs to be serviced. See
Drive Replacement section for more instructions.

800007 rev C1 Huge Systems U320-R User’s Guide Page 17 of 28
Drive Replacement
Access to the disk drive modules are from the front of the U320-R unit. The Front Panel needs to be
removed to access the modules. While modules may be removed and inserted when the U320-R is ‘hot’
(powered on), but we recommend turning off the U320-R when servicing the disk modules. Make sure to
shutdown the computer properly first before turning off the U320-R.
Remove the front panel
The front panel snaps on to four snap pins, to remove the front panel, simply lift the front of the U320-R by
a couple of inches using the front handle, locate the edge of the lower panel with your other hand and pull
the lower part of the panel towards you until it un-snaps, then continue the forward pull and lift up, the top
panel snaps will un-snap as the forward and up movement is continued.
Removing disk drive module
Identify and make a note of the module to replace by locating the slow blinking light next to it.
Shutdown the computer and turn off the U320-R.
Completely loosen the captive thumb screws to the left and right of the disk drive module.
Grab the handle of the disk drive module and GENTLY pull it towards you. Set the defective module a
side.
Insert the replacement disk drive module GENTLY by aligning the rails to the slots in the U320-R, slowly
and gently insert the module all the way into the U320-R until it engages the internal connections and snaps
into place.
Secure the left and right hand thumb screws.
Install the front panel.
Turn the U320-R back on. Wait 30 seconds.
Rebuilding a down drive (RAID 3 mode only)
The expected slow beeps followed by a continuous beep would indicate that a drive is still down. Press the
Mode Set / Rebuild switch to start the rebuild process. The audible alarm will stop but the Service
indicator will still be lit during this rebuild time.
Rebuild time will vary depending on your system work load, when system is idle the rebuild time is
approximately 12Gbytes/min or 83 minutes to rebuild a 1TByte unit.

Page 18 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Formatting and Partitioning
Formatting and Partitioning of the U320-R is required to prepare the unit for usage. After the unit is
physically connected to your computer, use the following sections as a guide to locate and execute the
appropriate utility to format and partition the U320-R.
The U320-R is seen as one large SCSI disk drive by the SCSI host adapter in your computer. Install the
appropriate driver for your SCSI Host Adapter. No additional software or drivers are necessary to use the
U320-R. Treat the U320-R as a normal ordinary hard disk drive when partitioning and formatting.
Macintosh G4 / G5 in OS X
Use the following configuration to get maximum speed from the U320-R with OS 10, for video
capturing/playback and editing.
Check and ensure you are using the latest recommended configuration for your SCSI controller card, video
capture card and editing software, update any software or drivers as necessary.
Preparing a single U320-R
Fig. 1
Launch the Apple Disk Utility
software and select the “Partition”
tab. Change the Volume Scheme to
1 segment. Highlight your Huge
drive on the left.
Fill in the Name field.
Select Mac OS Extended format.
Click on the “Partition” button to
proceed.
Disk Utility is located at Macintosh HD >
Applications > Utilities.

800007 rev C1 Huge Systems U320-R User’s Guide Page 19 of 28
Fig. 2
You will be given a warning.
Click the “Partition” button.
Fig. 3
You should now see your named
volume as show on the left hand
side of the screen.
Congratulations! You have
successfully prepared your U320-
R. You will find your new
volume on the desktop.

Page 20 of 28 Huge Systems U320-R User’s Guide 800007 rev C1
Preparing a pair of U320-R (striping)
Fig. 1
Launch the Apple Disk Utility
software and click on the RAID tab.
Disk Utility is located at Macintosh HD >
Applications > Utilities.
Fig. 2
Drag the disk set to stripe into the
area on the right side of the screen.