Manual

OWC MERCURY ELITE PRO DUAL

DEVICE SETUP

2.4 DRIVE FAILURE

In the event that one of the drives fails, the corresponding drive LED will turn solid red. If

the Mercury Elite Pro Dual was conﬁgured as a RAID 0 or Span, the data on the array is lost

and the volume is no longer usable. In a span, only the data stored on the failed drive is lost,

although data recovery software will be required to recover the data from the other drive in

the Span. If the drives were conﬁgured independently, then the data on the drive that did

not fail will remain intact.

2.4.1 Replacing Drives

If the Elite Pro Dual is set up as a RAID 1, a drive that has failed can be replaced. The

data will remain accessible via the functioning drive, until the RAID 1 array is rebuilt with

a new drive. If the Elite Pro Dual was purchased with drives already installed and it is

still under warranty, see Section 3.6 to contact OWC technical support and arrange for

replacement. If the unit is outside its warranty or was purchased without drives, follow

the assembly instructions in Section 2.2 to access and replace the failed drive.

If the Drive 1 LED is solid red, the failed drive is the one on the bottom, connected

directly to the black SATA connector on the circuit board (see Section 2.2, step 4). If the

Drive 2 LED is solid red, the failed drive is the one on the top, connected using a SATA

cable (see Section 2.2, step 5). IMPORTANT: a failed drive must be replaced with a drive

of identical model and capacity.

Once the drive has been replaced, if the Elite Pro Dual is conﬁgured as a RAID 1, the array

will automatically begin the rebuild process when it is turned on. This process may take

several hours to more than a day, based on the capacity of the drives. During the rebuild

process, the LED for the drive being rebuilt (Drive 1 or Drive 2) will blink green, and the

rebuild LED will blink green.

It is recommended to leave the Elite Pro Dual turned on during the entire rebuild process,

but if power is interrupted (or the computer sleeps), the unit will continue rebuilding

automatically when power is restored. Once the rebuild process is complete, the rebuild

LED will turn oﬀ and the LED for the rebuilt drive will resume normal activity. See Section

1.4 for more information on the behavior of the LEDs on the front of the Elite Pro Dual.

NOTE: The Mercury Elite Pro Dual needs an active data signal to remain on. If it is

disconnected from the computer, or if the computer goes to sleep or turns oﬀ, the

device will turn oﬀ. To minimize the total rebuild time, it is recommended to keep the

device connected to the computer (with the computer powered on), and disable any

hard drive sleep settings on the computer for the duration of the rebuild process.