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Owner’s Manual
Dual Bay USB 3.0
to SATA Hard Drive
RAID Enclosure
Model: U357-002
Package Contents
2
Features2
System Requirements
2
RAID Mode
3
Setting the RAID Mode
4
Installation Instructions
5
Warranty & Warranty Registration
6
1111 W. 35th Street, Chicago, IL 60609 USA • www.tripplite.com/support
Copyright © 2013 Tripp1Lite. All rights reserved.
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Package Contents:
• U357-002
• USB 3.0 A/B Device Cable
• External Power Supply with removable power cord
• Screws for mounting 2.5” hard drives
• Owner’s Manual
Features:
• Dual bay enclosure allows you to quickly turn any two 2.5” or 3.5” internal SATA
hard drives into external hard drives.
• Tested with up to 4 TB 3.5” HDD per bay (8 TB total), and up to 1 TB 2.5” HDD per
bay (2 TB total).
• Features RAID 0, RAID 1, JBOD, and Normal disk modes, giving you the flexibility to
access your data in whatever way works best for you.
• Supports USB 3.0 data transfer rates up to 5 Gbps. Backwards compatible with
USB 2.0 and 1.1.
• Compatible with SATA I, II and III hard drives.
• Built-in cooling fan keeps drives from overheating during prolonged use.
• Plug and play; no software or drivers required.
System Requirements:
• (x2) 2.5” or 3.5” SATA Hard Drive
• Computer with an available USB port. A USB 3.0 port is required to achieve
maximum speeds.
• Compatible with Windows®, Mac, and Linux
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RAID Mode
The enclosure can be set to function in one of four modes; Normal, JBOD, RAID 0,
and RAID 1, giving you the flexibility to access your data in whatever way works best
for you. The available modes are described below, with their corresponding dip switch
setting displayed on the left side of the image.
Normal Mode – This mode treats both hard drives as separate disks, allowing them to
be accessed independently of each other. Your computer will recognize them as if they
were flash drives being plugged into separate USB ports, not changing them in any
way.
2 Disk Volume
12
ON
SATA1 1000G
2 Disk Volume
SATA2 750G
SATA1 1000G
SATA2 750G
JBOD Mode – This mode combines the two hard drives into one large drive for the
purpose of increased storage space. Data is stored on one drive at a time, so when
the first one is full, the next one begins to be used. The computer’s operating system
will recognize them as a single drive.
2 Disk Volume
12
ON
SATA1 1000G
1 Disk Volume
SATA2 750G
1000G+750G=1750G
RAID 0 Mode – This mode combines the two hard drives into one large drive for the
dual purpose of increased storage space and performance. In this mode, data is split
amongst the two drives simultaneously, improving the read/write performance. The risk
in using this mode is that failure of one disk will result in total data loss. When using
this mode, it is recommended that you use hard drives with the same capacities. If
hard drives of different capacities are used, the smaller hard drive will be doubled in
size, with the remaining space on the larger hard drive going unused.
2 Disk Volume
12
ON
SATA1 1000G
1 Disk Volume
SATA2 750G
750Gx2=1500G
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RAID Mode
RAID 1 Mode – This mode creates two mirror disk drives for the purpose of data
redundancy. If one drive fails, the other drive serves as a back-up. When using this
mode, it is recommended that you use hard drives with the same capacities. If hard
drives of different capacities are used, the storage capacity will be limited to that of
the smaller drive, with the remaining space on the larger drive going unused.
Note: In RAID1 mode, if one of the drives fails, the Red LED to the right of the hard drive tray will
blink. Replacing the drive will cause the enclosure to automatically enter rebuild mode, in which
the Red LED will continue to blink to indicate that the RAID1 array is being rebuilt. Depending on
the size of the drives, this may take several hours to a full day.
2 Disk Volume
12
ON
1 Disk Volume
MIRROR
SATA1 1000G
SATA2 750G
750G
Setting the RAID Mode
Note: Make sure that you back up any important data prior to changing the enclosure’s RAID
mode. Initializing the RAID mode will erase all data on your hard drives.
When Powered On:
1. Install the hard drives in the enclosure according to the Installation Instructions
section in this manual, powering on the unit.
2. By default, the dip switches on the back of the unit are both set to the OFF (Up)
position, which will display the hard drives in Normal mode.
3. Set the dip switches on the back of the unit according to the desired mode. See
the RAID Mode section in this manual for each mode’s dip switch configuration.
Note: When changing from RAID 1 mode to another mode, you must first switch to RAID 0
mode. Once set to RAID 0 mode, you can change to any other mode.
4. After setting the dip switches accordingly, press and release the Reset button on
the back of the unit.
5. After a couple of seconds, your drives will be configured according to the mode you
have selected. The new drive will not be formatted, and will need to be formatted
using your computer’s Disk Management utility.
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Setting the RAID Mode
When Powered Off:
1. Install the hard drives in the enclosure according to the installation instructions in
this manual, but do not power on the unit.
2. By default, the dip switches on the back of the unit are both set to the OFF (Up)
position, which will display the hard drives in Normal mode.
3. Set the dip switches on the back of the unit according to the desired mode. See
the RAID Mode section in this manual for each mode’s dip switch configuration.
Note: When changing from RAID 1 mode to another mode, you must first switch to RAID 0
mode. Once set to RAID 0 mode, you can change to any other mode.
4. After setting the dip switches accordingly, power on the unit.
5. After a couple of seconds, your drives will be configured according to the mode you
have selected. The new drive will not be formatted, and will need to be formatted
using your computer’s Disk Management utility.
Installation Instructions
1. Remove a tray by pressing down the release tabs on its front and pulling it from the
enclosure.
2. Remove the side snaps from each side of
the tray.
3a.For a 3.5” HDD – Place the hard drive so that
the SATA connector faces the rear, and the
screw holes rest on top of the plastic pillars
located on the side of the tray. Re-insert the
side snaps on each side of the tray to secure
the drive in place.
step 2
3b.For a 2.5” HDD – Place the hard drive so that
the SATA connector faces the rear, lining up the screw holes on the bottom of the
drive with those on the tray. Secure the drive to the tray using the included screws.
4. Fully insert the tray into the enclosure until it locks into place.
5. Repeats steps 1 through 4 to install a second hard drive.
6. Connect the enclosure to your computer using the included USB 3.0 cable.
7. Connect the included power supply to the enclosure, and plug it into a Tripp Lite
Surge Suppressor, Power Distribution Unit (PDU), or Uninterruptible Power Supply
(UPS).
8. Press the power button on the front of the enclosure to turn power to the unit on.
The Blue Power LED under the button will illuminate to indicate the unit is powered
on. The Blue LEDs on the right front of each hard drive tray will illuminate solid to
indicate the drive is functioning properly. They will blink to indicate that RAID mode
has crashed or errors have occurred during RAID rebuilding. The Red LEDs on the
right front of each hard drive tray will blink to indicate that data transfer is taking
place.
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Warranty & Warranty Registration
1-Year Limited Warranty
TRIPP LITE warrants its products to be free from defects in materials and workmanship for a period of one
(1) year from the date of initial purchase. TRIPP LITE’s obligation under this warranty is limited to repairing
or replacing (at its sole option) any such defective products. To obtain service under this warranty, you must
obtain a Returned Material Authorization (RMA) number from TRIPP LITE or an authorized TRIPP LITE service
center. Products must be returned to TRIPP LITE or an authorized TRIPP LITE service center with transportation
charges prepaid and must be accompanied by a brief description of the problem encountered and proof of
date and place of purchase. This warranty does not apply to equipment, which has been damaged by accident,
negligence or misapplication or has been altered or modified in any way.
EXCEPT AS PROVIDED HEREIN, TRIPP LITE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Some states do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limitation(s) or
exclusion(s) may not apply to the purchaser.
EXCEPT AS PROVIDED ABOVE, IN NO EVENT WILL TRIPP LITE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS PRODUCT, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE. Specifically, TRIPP LITE is not liable for any costs, such as lost profits
or revenue, loss of equipment, loss of use of equipment, loss of software, loss of data, costs of substitutes,
claims by third parties, or otherwise.
Use of this equipment in life support applications where failure of this equipment can reasonably be expected
to cause the failure of the life support equipment or to significantly affect its safety or effectiveness is not
recommended. Do not use this equipment in the presence of a flammable anesthetic mixture with air, oxygen
or nitrous oxide.
WARRANTY REGISTRATION
Visit www.tripplite.com/warranty today to register the warranty for your new Tripp Lite product. You’ll be
automatically entered into a drawing for a chance to win a FREE Tripp Lite product!*
* No purchase necessary. Void where prohibited. Some restrictions apply. See website for details.
Tripp Lite follows a policy of continuous improvement. Product specifications are subject to change without
notice.
FCC Notice, Class B
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to this equipment not expressly approved by Tripp Lite could void the user’s
authority to operate this equipment.
WEEE Compliance Information for Tripp Lite Customers and Recyclers (European Union)
Under the Waste Electrical and Electronic Equipment (WEEE) Directive and implementing regulations,
when customers buy new electrical and electronic equipment from Tripp Lite they are entitled to:
• Send old equipment for recycling on a one-for-one, like-for-like basis (this varies depending
on the country)
• Send the new equipment back for recycling when this ultimately becomes waste
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Notes
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1111 W. 35th Street, Chicago, IL 60609 USA • www.tripplite.com/support
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