Nexsan U2G460 User manual

This document provides installation steps for racking and cabling the Unity Storage U2G460 Expansion,
and for connecting to a Unity Storage System. Instructions are also provided for powering on and
monitoring. For the latest updates, please visit https://helper.nexsansupport.com/unt_support
1 — U2G 460 Quick Start Guide
Firmware Version 6.0
Quick Start Guide
NEXSAN Unity Storage U2G460 Expansion
Taking delivery
Check to ensure that no damage has been sustained
to the packaging in transit. If any of the Unity storage
components appear damaged, you should file a
damage claim with your reseller.
Hardware overview
The front, top, and rear views of the U2G460 are
shown in these diagrams.
1Power supply units and fan assemblies
2Primary fan assemblies
3LEDs. See Monitor the Unity Storage
Expansion on page 7
4I/O module (IOM) ports: 6 HD Mini-SAS ports. See
Connect to a Unity Storage System on page 6
5Management ports
Prepare for installation
ACarefully read safety notices on page 8.
BEnsure ahead of time that you have a suitable
rack; see Rack and enclosure specifications on
page 8.
CEnsure that you have a Phillips screwdriver.
DArrange for assistance to unpack and move the
U2G460 Storage Expansion into position. The unit
weighs 84 lbs without drives and 175 lbs fully
populated (see page 8).
CAUTION: Acclimate new disk drives to
room temperature for two hours before you
install them.

2 — U2G460 Quick Start Guide
Unpack the U2G460
ARemove all the components from the packaging.
Use the black lifting straps to remove the
U2G460 chassis from its packaging.
BPlace the components on an anti-static surface
until you are ready to use them.
U2G460 package contents
Shipments typically include the following items:
One U2G460 expansion (with front bezel),
supporting up to 60 3.5” drives, or 2.5” drives with
adapters
Accessory tray:
2 top cover guide brackets
10 cage nuts
30 M5 x 12, T15 Torx screws, 2 M5 x 12 Philips
panhead screws (for the cover), 4 custom, low-
profile M4 screws (packaged with the rail kit)
16 custom round washers to attach outer-rack
rails to the rack (1 on the front and 1 on the
back for both the left and right rail assemblies)
Up to 3 drive packs. Drive packs consist of 1 SSD
and 19 DATA HDDs. Up to 3 drive packs can be
used in a U2G460. Check that the drives included
in your shipment correspond to your order and
packing slip.
Rails box - 2 rack rails with 1 inner rail per rack
rail.
Chassis with all internal components pre-installed,
except disk drives.
Drive blanks to fill empty slots, if applicable
MiniSAS HD passive SAS cables
Optional MiniSAS HD active cables
Two C13 to C14 power cables (3m)
Optionally, two cable management arms (CMAs)
1 electrostatic discharge (ESD) wrist strap
Rack the U2G460
Example rack positions for components:
Unity 4400 or Unity 6900 Storage System
U2G460 below the storage system
Step 1: Install the outer-rack rails on the
rack
AFrom the inside of the rail kit, press the release
latch to unlock the inner rails from the rack mount
rails. Pull the inner rail out of the rack mount rail,
and repeat for the remaining rail.
BAttach the outer rails to the rack. Pay special
attention to which side is being installed. The
embossed R is for the right side and L is for the
left side. Right and Left refer to when you are
facing the front of the rack.
aMove to the rear of the rack.
bOrient the rail so that the word "REAR"
embossed on the rail is at the rear end of the
rack, and the release button is facing the inside
of the rack posts as shown in the following
image.
cAlign the rail on the rack posts at the U-height
desired for installation. The bottom of the rail
will be the lower most U of the total 4U height.
dPull the rail toward the rack post until the
toolless latching mechanism engages the rack.
The latching mechanism may need to be
pulled open to get around the rack post.
eMove to the front of the rack.
fAlign the front of the rail with the holes on the
rack posts that will receive the rails and pull the
rail toward the holes until the toolless latching
mechanism engages the rack.
gUse a level to make sure that the rails are
aligned properly.
hFollow these steps for the other outer rail.
CAUTION: To avoid possible data issues,
disconnects, or damage, use cables that
can extend the length of the U2G460 when
the drawer is pulled open (maximum 4 m).
CAUTION: Physical installation requires
three people--two to move the enclosure
into position in the rack, and one to guide
and spot the others.

3 — U2G460 Quick Start Guide
Step 2: Install the inner rails on the chassis
AAttach left and right inner rails (viewing from the
front) by aligning the keyholes on the inner rail
with the mounting pegs on the side of the chassis
and sliding them forward to lock them in place.
Left and right are embossed with the letter “L” and
“R” on the side facing away from the chassis.
BFrom the side of the chassis, using the #2 Phillips-
head screwdriver, attach the inner rails to the
chassis using the screws provided with the rail kit.
CSlide the inner rail toward the rear of the chassis
to lock it into place.
DRepeat the previous steps to attach the other
inner rail to the chassis.
Step 3: Secure the cable tray (if necessary)
ASecure the cable tray onto the enclosure using the
included M3 x 8mm T10 Torx screws and the long
T10 Torx screwdriver. These screws should be
tightened to 3-5 in-lbf.
NOTE: .The cable tray only needs to be installed if
the number of cables being used is greater than
10. If not, this step is unnecessary.
Installfivecagenutspersideattheuppermostrackmountingholeofthe4Uspaceonthefrontoftherack.
BInstall one cage nut at the uppermost mounting
hole of the 4U space that the enclosure will
occupy.
CIf the U2G460 will be installed in a rack for
shipping purposes, install four more cage nuts in
holes 3-6 of the 4U space. These will receive the
M5 x 10mm T15 Torx screws that secure the
enclosure to the rack with the shipping bracket.
These screws should be tightened to 30-32 in-lbf
using a long T15 Torx screwdriver.
DInstall the rear cover alignment brackets.
aFrom the rear of the rack, orient the alignment
brackets so that the groove that will catch the
lid is facing the inside of the rack.
bUse five of the M5 x 10mm T15 Torx screws
and 5 of the included washers and attach the
rear cover alignment bracket to the vertical rail
with the Long T15 Torx Screwdriver. Add three
M5 x 10mm T15 Torx screws and three
included washers to attach the rear rail to the
rack posts as shown in the following image.
These screws should be tightened to 30-32 in-
lbf using a Long T15 Torx Screwdriver.
Step 3: Install the cable management arms
(if necessary)
NOTE: If you are using a storage enclosure with a
shorter depth you may not be able to use CMAs.
Ensure that the CMAs do not bind or bend. Improper
installations could result in damage to cabling and
components.
AInstall the upper CMA, orienting the elbow on the
right hand side.
BAlign the crossbar with the mounting peg facing
down and pointing toward the CMA mounting
bracket.
CInsert the peg on the underside of the
crossbar into the slot on the CMA mounting
bracket.
DSwing the crossbar so that the thumbscrew lines
up with the mounting hole on the opposite side of
the enclosure.
EPress the crossbar against the CMA mounting
bracket and secure the crossbar in place by
pressing and turning the thumbscrew clockwise
until snug.
FInstall the lower CMA arm, orienting the elbow on
the left side.
CAUTION: When installing the inner rail
onto the chassis, make sure to only use the
special low-profile M4 x 3.2mm Philips
screws provided in the accessory kit with
the CMA. These screws should be
tightened to 8-10 in-lbf using a # 2 Philips
screwdriver. These screws are specially
designed for this purpose. Using
unapproved screws could cause damage to
the slides inside the rail.
CAUTION: To avoid possible tipping of the
rack, install the U2G460 as low as
possible. Each fully loaded enclosure
weighs 175 lbs.

4 — U2G460 Quick Start Guide
GAttach all of the connectors to the brackets on the
rails and chassis. There should be one at the
elbow side and two at the other end.
Lower CMA orientation
HSlowly slide the enclosure forward to ensure the
CMA arm is operating properly, then slide it back
into the rack.
IMirror the steps above to install the lower cable
management arm.
Step 4: Thread the cables through the
CMAs
NOTE: Before cabling the CMAs, note the following
routing of the cables. For best results, the cables
that are supported by the upper CMA are inserted
into IOM B (right hand side looking at the rear) and
the lower CMA cables are routed to IOM A (left hand
side looking at the rear)
Thread the cables into the CMAs, beginning with the
lower CMA.
AUnlatch the elbow side of the CMA arm and swing
it forward by pressing the blue button that says
“push” to unlatch it.
BGather the SAS cables, one power cable, and one
Ethernet cable to install in the left hand side.
For each cable, reserve enough slack at the
connector end to operate smoothly. Allow 20" -
21" (508 – 533.4mm) between the end of the
connector and the first basket. Make sure to route
all of the upper CMA cables under the lower CMA
cables.
CTest for binding in the extension of the CMAs by
gently pulling the enclosure out of the rack to
ensure the cables extend properly and that the
system doesn’t bind. Adjust the lengths as
necessary.
Step 5: Install the U2G460 on the rack
AExtend the mid-rails out of the rack so that they
are protruding from the front of the rack and the
safety latches engage.
BTeam lift the U2G460 chassis from the sides—not
from the front and back.
CLine up the inner-chassis rails with the extended
rack rails, until the rail locks engage.
DLocate the blue tabs on each of the inner rails,
and slide them towards the front of the chassis.
Push on the chassis, pushing the U2G460
completely into the rack; you should hear the
locking tabs click into position.
ETighten the thumbscrews that hold the front of the
U2G460 to the rack.
CAUTION: This step in the installation
requires a minimum of 3 individuals to
install safely, two to lift and one to guide
the others whom may have difficulty seeing
because the enclosure is in the way.
Ensure that the appropriate measures are
taken to safely support the enclosure
during installation. The enclosure MUST
have no drives installed and requires a two
person team lift to install. Do not attempt to
lift the system if it is fully populated with
drives.
CAUTION: The handles on the front of the
chassis are not intended to be used to
support the weight of the Ultrastar Data60.
Lifting the unit by the chassis handles or
trying to support the unit on the handles
can cause them to fail. This can cause
serious damage to the unit or serious
bodily harm to those handling the unit.
Always team lift the chassis by gripping the
underside of the unit, and never try to lift a
chassis that is filled with drives.
WARNING: Do not lift the chassis by the
cable tray while removing the chassis from
the rack OR while installing it into a rack.
This can cause serious damage to the
storage expansion or serious bodily harm
to those handling it.
Always team lift the chassis by gripping the
underside of the unit, and never try to lift a
chassis that is filled with drives.
CAUTION: To prevent potential damage
due to improper mating of the rails, make
sure that the bearing plates on the inside of
the mid-rails are fully forward and that the
lock has engaged.

5 — U2G460 Quick Start Guide
Step 6: Install the disk drives and FASTier
read cache SSDs
Drive installation order:
To ensure proper air flow, install the drives as
explained below. The enclosure does not support a
mix of SAS and SATA drives. Any unfinished rows
must be completed with drive blanks.
If you are installing a 19-drive pack + 1 FASTier
Read cache SSD:
AInstall the FASTier drive in slot 59, and complete
the back row with drive blanks.
BInstall the HDDs in the next rows and complete
any partial row with drive blanks.
If you are installing a 38-drive pack + 2 FASTier
Read cache SSDs:
AInstall the FASTier drives in slots 58 and 59, and
complete the back row with drive blanks.
BInstall the HDDs in the next rows and complete
any partial row with drive blanks.
If you are installing a 57-drive pack + 3 FASTier
Read cache SSDs:
AInstall the FASTier drives in slots 57, 58, and 59,
and complete the back row with drive blanks.
BInstall the HDDs in the remaining slots.
Drive layout
CInstall the drives closest to the power supplies at the rear of the enclosure, moving forward one row at a
time.
To install the drives:
ASlide the expansion out of the rack, by pulling on
the front handles.
BSlide the expansion cover back to show the drive
bays.
CAlign the drive with the empty slot that will receive
it. Lower it into the slot, making sure it stays level
and does not snag.
DPinch the
latch
release and
carefully
press
downward
to seat the
drive
assembly
the rest of
the way..
ERepeat these steps for each drive, following the
drive layout shown above.
NOTE: If you have empty drive bays in a row of 12,
you must include blank drive spacers to ensure
proper airflow to the working drives.
If you add drives of a different size to an existing
system, you must reconfigure RAID for the new
disks. Refer to the Nexsan Unity Online Help.
Install the Unity Storage System
Unpack and install any Unity Storage System
included in your Unity shipment. The U2G460 can be
used with either a Unity 4400, or a Unity 6900.
For detailed instructions, refer to the appropriate
Nexsan Unity Quick Start Guide and the Nexsan
Unity Storage Expansion Reference Guide at
www.nexsan.com/ (see Support > Unity >
Documentation & Online Help).
CAUTION: Put on the ESD wrist strap
before starting:
ASlip the wrist loop over your hand (left or
right), then tighten the loop against your
wrist.
BAttach the clip end of the anti-static wrist
strap to a properly grounded metal
surface.
The enclosure does not support a mix of
SAS and SATA drives.
CAUTION: If the U2G460 is not fully populated, to maintain proper air flow you MUST
install drive blanks to complete the last incomplete row of drives.

6 — U2G460 Quick Start Guide
Connect to a Unity Storage
System
Connect one or more U2G460 expansions to a Unity
Storage System and power them on.
Step 1: Connect to the U2G460:
Cross-connect from the Add-on HBA SAS OUT
ports on the Unity Storage System to the HBA
SAS IN ports on the first U2G460, as shown in
Unity 4400 connected to U2G460 expansions,
below.
You can cascade other types of Nexsan storage
expansions with the U2G460, but the U2G460 units
must be connected last in the series.
For details about connections and about cascading
to more Unity Storage Expansions, please see the
Nexsan Unity Storage Expansion Reference Guide
at www.nexsan.com.
The Unity Storage System is hot pluggable: Once in service, powering down is not normally required to add
a Unity Storage Expansion. It is recommended to plug in the power cables to power on the new U2G460
last.
Unity 4400 connected to U2G460 expansions
Step 2: Connect the power cables APlug the power cords into their respective power
supplies on the rear of the U2G460.
BPlug the power cords connected to the power
supply units into a high-quality strip that offers
protection from electrical noise and power surges.
NOTE: We strongly recommend that you use an
uninterruptible power supply (UPS).
CAUTION: Do not connect to the Unity Storage Expansion from the lower, on-board
SAS ports on the Unity 4400 or the Unity 6900.
Use cables that can extend the length of the U2G460 when the drawer is pulled open.
Use up to 3m SAS cables to connect between the Unity Storage System and U2G460.
Passive SAS cables should only be used when connecting the first U2G460 to the Unity
Storage System. Active SAS cables are required to daisy chain between U2G460s.
CAUTION: Use only the power cords
supplied with the U2G460. Do not use
another type of cord or extension cords. If
you require additional power cords, please
contact your Nexsan sales representative
or reseller.

7 — U2G460 Quick Start Guide
Power on Unity components
Power on the Unity components for the first time in
the sequence described in this section.
Step 1: Power on the U2G460
APlug in the power cables on the back of the
U2G460. The U2G460 will power on
automatically.
NOTE: If you are adding multiple Unity Storage
Expansions, power them on from last to first.
Step 2: Power on the Unity Storage System
Power on the Unity Storage System; either the
Nexsan Unity 4400 or the Nexsan Unity 6900.
If a drive carrier activity LED does not light up, check
to make sure the corresponding drive is properly
seated in the chassis.
APress and hold the power button located on
the right front panel of the chassis until the
power led lights up.
BVerify that the power LEDs on the left and
right front control panels are illuminated to ensure
that the controller nodes are receiving power and
the power modules are functioning properly.
CVerify that the heartbeat is blinking yellow in
2-3 second intervals.
DVerify that the drive carriers LEDs are illuminated
in green.
EIf all LEDs indicate normal operational status,
reattach the front bezel to the Unity 4400:
aRemove the bezel from its packaging.
bHook the left end of the bezel onto the chassis.
cFit the free end of the bezel onto the chassis.
dTurn the key lock at the right end of the bezel
to the lock position to secure the bezel to the
chassis.
Monitor the Unity Storage Expansion
This section describes the front and back panel LEDs that help you monitor the Nexsan Unity U2G460
Storage Expansion.
Rear I/O LEDs
Number Color LED name Description
1 Green SAS link
status
Solid – SAS Cable Connected
Off – SAS Cable Not Connected
2 Amber SAS fault
status
Blink @ 1 Hz – SAS connection fault
Off – No SAS connection fault
3 Blue Identification Blink @ 1 Hz – Blinks only when Identification has been
activated. Will blink when any component is identified.
4 Amber Fault Blink @ 1 Hz –Enclosure has a fault
Off – Enclosure has no fault
5 Green Power Solid - Powered On
6 Green/Amber Ethernet
connectors
link/activity
Off - Operating at 10 Mbps
Green Solid - Operating at 100 Mbps
Amber Solid - Operating at 1Gpbs
7 Green Ethernet
connector
Off - No Connection
Solid - Connected
Blink - Activity

Copyright © 2010-2019 Nexsan Technologies, Inc. All Rights Reserved. Nexsan®, Unity™, Unity 2200™, Unity 4400™, Unity 6900™, Unity 2200X™, US
224™, US 316™, US 424™, US 460™, U2G460™, FASTier™, and the Nexsan logo are trademarks or registered trademarks of Nexsan Technologies, Inc.
All other trademarks and registered trademarks are the property of their respective owners.
Nexsan 325 E. Hillcrest Drive, Suite 150, Thousand Oaks, CA 91360 | www.nexsan.com
Part number: P0450180 Rev: ARelease Date: July 2019
Related Documentation: Nexsan Unity Hardware Maintenance Guide,
Nexsan Unity Software User Guide, Nexsan Unity Online Help, Nexsan
Unity nxadmin CLI Reference Guide
Technical Support
By Email: [email protected]
By Web: http://helper.nexsansupport.com/unt_support.html
The U2G460 storage expansion has the following LEDs on the front of the enclosure:
The U2G460 I/O modules (IOMs) have the following LEDs:
Each drive carrier has two LEDs. If a drive fails, replace the drive as described above. See Step 6: Install the
disk drives and FASTier read cache SSDs
Safety notices
This equipment must be installed and operated in
compliance with local laws and regulations.
Ensure that the ambient temperature at the
installation is between 5°C (41°F) and 35°C
(95°F). If the temperature at the site is not actively
regulated, ensure that daily and seasonal
temperature changes will not result in the ambient
temperature going outside these limits.
Always fully stabilize racks with wall anchors or
stabilizing legs, or both, before mounting the
Nexsan storage unit or any other components on
the rack.
Situate the rack so that full air flow at both the
front and the rear of the Nexsan storage system is
possible.
Ensure that the floor beneath the mounting rack
has enough load-bearing capacity to support the
rack and all mounted components.
Always fully secure all rack-mounting hardware
when installing the Nexsan storage system in a
rack. Insufficient rack-mount support may allow
the unit to fall onto other rack-mounted hardware
or onto the floor, potentially damaging equipment
or causing injury to nearby personnel.
Rack and enclosure specifications
Rail kit mounting
4U enclosure height
The rack must have square roles
Maximum distances: 30" (800 mm)
Enclosure weight and dimensions
Height: 6.88’’ 174 mm
Width: 17.72’’ 450 mm
Depth: 35.43’’ 900 mm
72” 1830 mm (extended)
Weight: 83.9 lbs 38.4 kg (no drives installed)
175 lbs 79.4 kg (all drives installed)
Power requirements
Power supply: 1,600W
Input voltage: 200-240V
Power consumption: varies depending on the
number and size of drives, running fans, and room
temperature
Number Color LED name Description
1 Blue Identify Blink @ 1 Hz – Blinks only when Identification has been
activated. Will blink when any component is identified.
2 Amber Fault Blink @ 1 Hz –Enclosure has a fault
Off – Enclosure has no fault
3 Green Power Solid - Powered On
Color Name Description
Blue Identify Blink @ 1 Hz – Blinks only when Identification has been activated. Will blink
when any component is identified.
Amber Fault Blink @ 1 Hz –Enclosure has a fault
Off – Enclosure has no fault
Green Power Solid - Powered On