User guide

OWC MERCURY ELITE PRO Qx2
SYSTEM SETUP
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2.4.2 Adding Drives to an Existing RAID Set
It is not possible to add more drives to an existing RAID set. In order to add drives, a new
RAID set must be created, which will destroy the data on the existing RAID set. If you
wish to add more drives, shut off the Mercury Elite Pro Qx2, then add the drives. Once all
of the drives that you wish to use are installed, go through the steps in section 2.3.1 to
create the new RAID set.
2.4.3 Replacing Drives
When one of the drives fails, the corresponding LED will turn off. If only one drive has
failed and the RAID mode is set to RAID 1, RAID 10, or RAID 5, the data on the RAID
set will still be accessible, but it is strongly suggested that you replace the failed drive
immediately with another drive of identical model and capacity to ensure the continued
safety of your data.
If more than one drive fails at the same time, or if one drive fails and the RAID mode is set
to RAID 0 or span, the data is lost (in span mode, only the data stored on the failed drive
is lost) and the volume cannot be accessed again until the failed drives are replaced and
a new RAID set is created.
When a drive fails, follow these steps:
1. Identify the failed drive and replace it (see section 2.1 for instructions). The LED that is
off indicates the failed drive. You do not need to turn off the Mercury Elite Pro Qx2 to
do this.
2. For RAID 1, RAID 10, and RAID 5, the RAID set will rebuild automatically. During the
rebuild process, the LED of the drive being rebuilt will flash orange. Depending on the
capacity of the drives being used, the rebuild process will last from several hours to
a few days. Once the rebuild is complete, the drive LED will turn green and flash with
activity as normal.
3. For RAID 0 and span, the drive LED will turn green, showing that the failed drive has
been replaced and the new drive is ready to be used. You will need to go through the
steps in section 2.3.1 to create a new RAID set before the Qx2 can be used again.
NOTE: We recommend that you do not turn off the power during the rebuild process,
but if power is interrupted, the data will continue rebuilding from where it left off as
soon as power is restored. The Mercury Elite Pro Qx2 does not need to be connected to
a computer for the rebuild process to take place.