Drive Failure; Replacing Drives - OWC MERCURY ELITE PRO DUAL Assembly Manual & User Manual

Span Mode:
Both drives show up as a single large volume, but one which functions differently than
RAID 0. The total size will depend on the drives installed; unlike RAID 0 you can use drives
of different capacities. A Span is an array (but not a RAID) in which the data is written
sequentially across the drives. When one drive becomes full, subsequent data is written
to the second drive. This combines the capacities of the drives, but it does not provide
any performance or data redundancy benefits.
Independent Drive Mode
Each drive will appear individually without being combined. If you are using drives of
differing capacity and model, or if you are using only one drive, this is the mode to use.
NOTE: Drives of identical model and capacity are required for RAID 0 and RAID 1.

2.4 Drive Failure

In the event that one of the drives fails, the corresponding drive LED will turn
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 3.5 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).
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
rebuild LED will
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.
OWC MERCURY ELITE PRO DUAL
a failed drive must be replaced with a drive of identical
IMPORTANT:
blink green.
10
solid
green, and the
blink
DEVICE SETUP