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MODE SW#1 SW#2 SW#3

RAID 1 --- OFF OFF

RAID 0 --- OFF ON

SPAN --- ON OFF

INDEPENDENT --- ON ON

2TB MODE ON --- ---

To change the RAID settings on your FireWire & USB equipped enclo-

sure, there are jumpers located on the bridge board inside the enclo-

sure that need to be adjusted. To do so, you will need to remove the

outer shell of the enclosure.

INDEPENDENT - Each hard drive will appear as a separate volume. You

can use dierent models and sizes of hard drive with this mode. NOTE:

Only FireWire and USB connections support independent mode.

SPAN (JBOD) -The drives show up as one large single volume. The total

size will depend on the drives installed, you can use drives of dierent

capacities. Spanning is an array (not RAID) that is written sequentially to,

across the hard drives. By itself, it does not provide any performance or

redundancy benets.

RAID 0 (STRIPE) - The drives show up as one large (single) volume. It is

highly recommended to use identical hard drives for this RAID method.

However, you can utilize drives of dierent capacity, but realize that the

RAID size will be based on the smallest capacity total of the drives used

in the RAID set.

RAID 1 (MIRROR) - The drives show up as one volume, but only 50% of

the total capacity can be used. It is highly recommended to use identical

hard drives for this RAID method. However,while you can utilize drives

of dierent capacity, the RAID size will be based on the smallest capacity

total of the drives used in the RAID set. RAID 1 creates an exact copy (or

“mirror”) of a set of data on the second drive. This is useful when reliabil-

ity and backup are more important than capacity. When one drive fails,

it can be replaced and the data rebuilt.

2TB MODE - When Switch #1 is in the ON position, the total capacity of

the drives (either in INDEPENDENT or any other mode) are limited to a

maximum of 2.2TB for compatiblity with older systems.

OWC Mercury Elite-AL Pro Dual Chapter 2 - System Setup

2.3 RAID Conguration (FW/USB/eSATA Model ONLY)

OWC Mercury Elite-AL Pro Assembly Instructions

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