Drive Replacement; Rebuilding A Raid - OWC Mercury Elite Pro Dual Assembly Manual & User Manual

2.4.1 Drive Replacement

If the drive was part of a RAID 1, it can be replaced and the array will be rebuilt. In the
meantime, the data will remain accessible through the other drive in the RAID 1. If the
Mercury Elite Pro Dual was purchased with drives already installed and it is still under
warranty, see Section 3.6 for information on how to contact OWC technical support to
arrange for replacement.
If the warranty has expired or if the Mecury Elite Pro Dual was purchased without drives,
follow the assembly instructions in Section 2.2 to access and replace the failed drive.
If the HDD2 LED is blinking 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
HDD1 LED is blinking red, the failed drive is the one on the top, connected using cables
(see Section 2.2, step 5).
NOTE: The failed drive must be replaced with a drive of identical model and capacity if
being used in a RAID 0 or RAID 1.
If the Mercury Elite Pro Dual is set up as a span or as a RAID 0, the array must be reformat-
ted before it can be used again. If the device is set up in independent drive mode, you
do not need to reformat the existing drive or the new drive. If the new drive had data
on it before being installed in the Mercury Elite Pro Dual, that data will remain intact. See
Section 2.4.2 for information on rebuilding after drive replacement in a RAID 1.

2.4.2 Rebuilding a RAID 1

After the failed drive is replaced, if the device is configured as a RAID 1, the array will auto-
matically begin the rebuild process when it is turned on. This process may take from sev-
eral hours up to more than a day, based on the capacity of the drives. During the rebuild
process, the power LED will pulse blue slowly. It is recommended to leave the Mercury
Elite Pro Dual turned on during the entire rebuild process, but if power is interrupted,
the unit will continue rebuilding automatically when power is restored. Once the rebuild
process is complete, the power LED will resume normal activity. See Section 1.4 for
more information on the behavior of the LEDs on the front of the Mercury Elite Pro Dual.
NOTE: The Mercury Elite Pro Dual needs an active data signal to remain on. If it goes
to sleep, if it is disconnected from the computer, or if the computer goes to sleep or
turns off, the device will turn off. In order to minimize the total rebuild time, it is recom-
mended to keep the device connected to the computer, keep the computer turned on,
and disable any hard drive sleep settings on the computer for the duration of the rebuild
process.
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OWC DIGITAL - MERCURY ELITE PRO DUAL DEVICE SETUP