Product ID: SAT3520U3R
The SAT3520U3R USB 3.0 to Dual 3.5-inch SATA Trayless Hard Drive Enclosure makes adding fast external storage easy, by turning any two 3.5-inch internal SATA hard drives into an external hard drive. Large capacity drives (tested with up to 4TB per bay) can be used to greatly enhance your computer's storage/backup capabilities.
The hard drive enclosure features a trayless system that eliminates having to mount and fasten the hard drive into the enclosure or tray, for quick and easy installation or removal.
Using the SuperSpeed USB 3.0 interface, which is up to 10 times faster than the previous USB 2.0, makes backing up and transferring large files faster than ever, while still being usable on older USB 2.0 systems. With built-in RAID capabilities (0, 1, BIG, JBOD), the two drives can be combined for speed, redundancy, capacity, or even left as separate drives, based on situation needs.
Warranty Information | Warranty | 2 Years |
---|---|---|
Connector(s) | 2 - Drive Connectors | SATA Data & Power Combo (7+15 pin) |
1 - Host Connectors | USB Type-B (9 pin) USB 3.0 | |
Environmental | Operating Temperature | 5°C to 80°C (41°F to 176°F) |
Storage Temperature | -40°C to 70°C (-40°F to 158°F) | |
Humidity | 8% ~ 90% RH | |
Hardware | Interface | USB 3.0 |
Number of Drives | 2 | |
Drive Size | 3.5in | |
Compatible Drive Types | SATA | |
Drive Installation | Removable | |
Fan(s) | Yes | |
1 - Fans | 55 mm | |
Chipset ID | JMicron - JMS551 | |
Indicators | 2 - LED Indicators | Activity (blue) |
Power (blue) | ||
Packaging Information | Package Quantity | 1 |
Package Length | 25.5 cm [10.0 in] | |
Package Width | 13.9 cm [5.5 in] | |
Package Height | 18 cm [7.1 in] | |
Shipping (Package) Weight | 1.5 kg [3.4 lb] | |
Performance | Type and Rate | USB 3.0 - 5 Gbit/s |
UASP Support | No | |
Type and Rate | SATA II (3 Gbps) | |
Hardware Raid Supported | Yes | |
Supported RAID Modes | JBOD - (Just a Bunch of Disks) | |
BIG (Spanning or Concatenation) | ||
RAID 1 (Mirrored Disks) | ||
RAID 0 (Striped Disks) | ||
Max Drive Capacity | Currently tested with up to 4TB 5400 RPM hard drives per bay (8TB total) | |
Insertion Rating | 15, 000 cycles | |
Temperature Alarm | No | |
Physical Characteristics | Color | Black |
Material | Aluminum and Plastic | |
Product Length | 21 cm [8.3 in] | |
Product Width | 76 mm [3.0 in] | |
Product Height | 13.5 cm [5.3 in] | |
Weight of Product | 858 g [30.3 oz] | |
Power | Power Source | AC Adapter Included |
Input Voltage | 110V-240V AC | |
Output Voltage | 12V DC | |
Output Current | 3A | |
Software | OS Compatibility | OS independent; No software or drivers required |
Special Notes / Requirements | System and Cable Requirements | Available USB port |
What's in the Box | 1 - Included in Package | Hard Drive Enclosure |
USB 3.0 Cable | ||
3 - Included in Package | Power Cord (NA/UK/EU) | |
1 - Included in Package | Universal Power Adapter | |
Instruction Manual |
Add one internal and one external SuperSpeed USB 3.0 to your PC
Flush mount a USB 3.0 ExpressCard adapter into a laptop ExpressCard slot
Add 2 USB 3.0 ports to a desktop computer through a PCI slot
Add 2 USB 3.0 ports through a mini PCI Express slot
Add two flushmount USB 3.0 ports to your ExpressCard-enabled laptop
Add 2 USB 3.0 ports to your desktop computer through a PCI Express expansion slot
Add 4 USB 3.0 ports to your desktop computer through a PCI Express expansion slot
We are always ready to assist you with any questions you may have.
Live Chat (opens in new window)We are always ready to assist you with any questions you may have.
Live Chat (opens in new window)When you troubleshoot issues with a hard drive enclosure, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:
To test your setup components, try the following:
When you test the hard drive and hard drive enclosure, it is recommended that you do the following:
Note: Formatting a hard drive erases all of the data on it. Make sure that you back up all of your data before you reformat the hard drive.
Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.
Note: Any data currently on the drives will be lost during this process. You need to back up all of your data before you set a RAID mode.
To set up a RAID mode, complete the following:
In order to rebuild a RAID array, you need to replace a physical drive with an identical drive on the same RAID controller. Although standard RAID levels are generally agreed upon throughout the industry, the implementation varies between manufacturers. RAID arrays are typically not accessible when they are moved to another controller, and data may be unrecoverable if the drives are out of order or have been formatted or accessed by another RAID controller.
If a RAID controller has failed, you should get the exact same model of RAID controller.
Note: If a drive or drives were damaged, it is possible that the RAID array may be permanently unrecoverable.
RAID should not be considered a replacement for backing up your data. If critical data is going onto a RAID array, you should back up the data on another physical drive or logical set of drives.
With the following RAID modes, recovery is possible using the same StarTech.com product. Refer to the following table for the appropriate method to use to recover your RAID array.
RAID mode | Max # of failed drives | Procedure |
RAID 1 | Only one drive is needed for recovery. |
The array will rebuild and is accessible during the rebuilding process. |
RAID 3 | Single drive failure will rebuild. |
Note: Do not change the order of the drives.
|
RAID 5 | Single drive failure will rebuild. |
Note: Do not change the order of the drives.
|
RAID 10 | Only one drive in a mirrored set can fail. |
Note: Do not change the order of the drives.
|
To confirm that the Mac OS detects your USB device, complete the following:
You may need to refresh the System Information page after you plug in your device. To do so, press Command + R with the System Information page open.
Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.
To determine if your hard drive will work in this enclosure, on the product page, click the Technical Specifications tab, and do the following:
Note: Not all StarTech.com devices support each of the RAID modes described below. For more information on the RAID modes that your device supports, refer to the manual or the StarTech.com product page.
Redundant Array of Independent Disks (RAID) is a virtual disk technology that combines multiple physical drives into one unit. RAID can create redundancy, improve performance, or do both.
RAID should not be considered a replacement for backing up your data. If critical data is going onto a RAID array, it should be backed up to another physical drive or logical set of drives.
The following are terms that are normally used in connection with RAID:
Different RAID levels exist for different application requirements.
Refer to the following table for the list of RAID modes offered by some StarTech.com products:
RAID mode | Description | Operation | Advantages | Disadvantages | Recovery |
RAID 0 | Striped disks | Data is split evenly between two or more disks. | Large size and the fastest speed. | No redundancy. | If one or more drives fails, this results in array failure. |
RAID 1 | Mirrored disks | Two or more drives have identical data on them. | A single drive failure will not result in data loss. | Speed and size is limited by the slowest and smallest disk. | Only one drive is needed for recovery. |
RAID 3 | Striped set with dedicated parity | Data is split evenly between two or more disks, plus a dedicated drive for parity storage. | High speeds for sequential read/write operations. | Poor performance for multiple simultaneous instructions. | A single drive failure will rebuild. |
RAID 5 | Striped disks with distributed parity | Data is split evenly between three or more disks. Parity is split between disks. | Large size, fast speed, and redundancy. | The total array size is reduced by parity. | A single drive failure will rebuild. |
RAID 10 | 1+0; Striped set of Mirrored Subset | Four or more drives are made into two mirrors that are striped. | Larger size and higher speed than RAID-1, and more redundancy than RAID-0. | No parity. | Only one drive in a mirrored set can fail. |
JBOD | Just a Bunch Of Disks | Any number of drives are accessed independently by the operating system. | Software RAID modes can be used. | Hardware RAID may have better performance. | N/A |
Big | Spanning or Concatenation | Data is written on one drive until it is full, and then the next drive(s) until it or they are full. | Creates a very large and simple array. |
No redundancy. |
N/A |
Clone | RAID 1 + Spare |
Two drives have identical data, plus one drive is used for rebuilding in case of a primary array failure. |
Seamless operation when one drive fails in a RAID-1 array. | Spare drive is not accessible to the user. | Only one drive is needed for recovery. |
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