User guide

OWC Mercury Rack Pro Chapter 2 - 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
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 we strongly
suggest that you replace
the faulty drive mecha-
nism immediately with an identical model / capacity drive to assure continued backup
and data safety. To remove the drive from the enclosure, simply use the ip 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/Span, the data is lost (in Combine mode, only on that one
drive) and the system cannot be accessed again until the drive(s) are replaced and a
new array is built.
➀ Check the HDD LED and replace the faulty drive. The red LED indicates the defective
drive. You do NOT need to power the enclosure o to do this.
➁ For RAID 1, RAID 3 RAID 5, and RAID 10, the RAID array will be rebuilt automatically.
During the rebuild process, the drive LED will ash red. Rebuilding the RAID array will
take several hours to days, depending on drive capacity. Once the rebuild is complete,
the LED will turn o, or ash red with activity. Power cycle the rack enclosure to return
to normal LED operation.
➂ For RAID 0 and Combine/Span, mode, the corresponding LED will turn blue show-
ing that the defective drive is replaced and a good drive is inserted into the bay. You
will need to clear and reset your RAID. See section 1.6.1 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 o during the rebuild process but if it is
interrupted, it will continue rebuilding the data 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 complete.