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                                                                                                                             System Setup 

 

2.2  Replacing Hard Drives 

When a drive fails, the corresponding HDD LED (A or B) will be blinking slowly, unless the RAID 
mode is set to Non-RAID, in which case the HDD will simply not be accessible anymore.  
 
If only one drive is defective and the RAID mode is set to RAID 1, the data can still be accessed 
but we strongly recommend replacing the faulty drive immediately to assure continued proper 
backup and data safety. 
 
If more than one drive at the same time fails or if the RAID mode is set to RAID 0, the data will be 
lost and the system can not be accessed again until the drive(s) have been replaced. 
 

2.2.1  Non-RAID 

1.  Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly. 

2.  Turn off the power and replace the faulty drive(s). 

3.  Turn on the power. The corresponding LED will turn a steady green again. 

4.  Format the new drive(s). 

 

2.2.2  RAID 0  

1.  Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly. 

2.  Turn off the power and replace the faulty drive(s). 

3.  Turn on the power. The corresponding LED will turn a steady green again. 

4.  Push the button above the RAID switch to confirm the current RAID mode. 

5.  Format the drive. 

 

2.2.3  RAID 1 

1.  Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly. 

2.  Turn off the power and replace the faulty drive. 

3.  Make sure the USB cable is plugged in and connected to your computer. 

4.  Turn on the power and wait for about 30 seconds for the system to start up. 

5.  Install the new hard drive. 

6.  The LED of the source drive will start to blink rapidly and the LED of the destination drive 

will start to blink slowly. This indicates that it is now rebuilding the RAID array. 

7.  Rebuilding the RAID array will take several hours, depending on the drive capacity. When 

the data has been restored, the LEDs will turn a steady green. 

 

Note  

We recommend not turning off the power during the rebuild process but if the process is 
interrupted, it will continue rebuilding the data as soon as the power is turned back on. 
 
 

Page 5 

Summary of Contents for MT2U3-MP

Page 1: ...3 5 Dual Bay USB 3 0 RAID HDD Enclosure BARCODE User Manual August 11 2011 v1 1 MFG Part MT2U3 MP ...

Page 2: ......

Page 3: ... are recommended Supports large volumes in excess of 2TB Note In order for the computer to access volumes larger than 2TB both the hardware and OS need to have the capacity to support large volumes e g Windows Vista or Mac OS 10 4 and above 1 2 Package Contents Package content may vary depending on vendor version NT2 storage enclosure hard drives not included Power supply Interface cable User manu...

Page 4: ... from the hard drives The slow blinking will be slower and the fast blinking will be faster than the usual flashing of the LED during data access 1 5 2 RAID switch DIP Switch RAID Mode Non RAID Switch position 1 OFF 2 OFF RAID 0 Striping Switch position 1 ON 2 OFF RAID 1 Mirroring Switch position 1 OFF 2 ON Note Except for the Non RAID mode two hard drives are required After changing the RAID mode...

Page 5: ...es On the downside if one drive becomes damaged the whole array can become corrupted 2 drives 1 6 3 RAID 1 Disk Mirroring Two drives show up as one volume but only 50 of the total capacity depending on the drive with the smallest capacity can be used RAID 1 creates an exact copy or mirror of a set of data on the second drive This is useful when reliability and backup take precedence over storage c...

Page 6: ...isk utility to create a new partition and format the drives 6 Done Your external drive is now ready to use Note Be careful not to damage any components and do not force the drives into place If they not easily slide into place and fit make sure the drives have been installed correctly The top of the drives where the label is located should face each other 2 1 1 Installing a HDD with existing data ...

Page 7: ...g LED for the defective drive will be blinking slowly 2 Turn off the power and replace the faulty drive s 3 Turn on the power The corresponding LED will turn a steady green again 4 Push the button above the RAID switch to confirm the current RAID mode 5 Format the drive 2 2 3 RAID 1 1 Check the HDD LED The corresponding LED for the defective drive will be blinking slowly 2 Turn off the power and r...

Page 8: ...rs other sources of heat Locations with very high temperatures more than 38 C or humidity more than 90 Very dusty or sandy locations Locations subject to vibration shock or with a sloping base 2 4 3 Electricity and power plug Careful attention must be paid to the following points in order to prevent damage fire and or injury When removing the power cable from the socket pull on the plug fixture an...

Page 9: ... but in general we recommend Windows Vista 7 NTFS Mac OS X HFS Mac OS Extended To use it on both PC and Mac FAT32 single file size is limited to 4GB Q How many drives can fail before I lose my data A For RAID 0 any drive failure will result in the data being lost For RAID 1 more than one drive failure at the same time will mean the data can not be recovered anymore For Non RAID only the data on th...

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