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OWC MerCury raCk PrO SySTeM SeTuP

2.2 REPLACING DRIVES

When one of the drives fails, the corresponding activity LED will light up solid red and the

alarm will sound. To disable the alarm, press the “Set/Mute” button once. If only one drive

is defective and the RAID mode is set to RAID 1, RAID 3, RAID 5, or RAID 10, the data can still

be accessed, but it is strongly suggested that you replace the faulty drive mechanism im-

mediately with an identical model/capacity drive to assure continued data safety. To remove

the drive from the enclosure, simply use the ﬂip lever located above the drive to eject the

drive mechanism.

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 Combine/JBOD (SPAN), the data is lost (in Combine mode, only the data stored

on the one failed drive is lost) and the system cannot be accessed again until the drive(s) are

replaced and a new array is built.

1. Check the HDD LED and replace the faulty drive. The red LED indicates the defective

drive. You do NOT need to power the enclosure oﬀ to do this.

2. For RAID 1, RAID 3 RAID 5, and RAID 10, the RAID array will be rebuilt automatically. Dur-

ing the rebuild process, the drive LED will ﬂash red. Rebuilding the RAID array will take

several hours to days, depending on drive capacity. Once the rebuild is complete, the

LED will turn oﬀ, or ﬂash red with activity. Power cycle the rack enclosure to return the

LED to normal operation.

3. For RAID 0 and Combine/JBOD (SPAN) modes, the corresponding LED will turn blue,

showing that the defective drive has been replaced and a good drive is inserted into

the bay. You will need to clear and reset your RAID. See Section 1.7.1, Changing the

RAID Mode for details on how to do that.

NOTE: Combined drives or independent drives can have the data from the good drives

recovered in most cases.

NOTE: We recommend not turning the power oﬀ during the rebuild process, but if power

is interrupted, the data will continue rebuilding as soon as the power is restored. The

OWC Mercury Rack Pro does not need to be connected to a computer for the rebuild

process to take place.

OWC Mercury Rack Pro Assembly Manual & User Guide

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