CRU DataPAK - Manual (Page 16)

Page 16
5.3.2.5 Degraded: RAID 5
The loss of a drive in a RAID 5 without Hot Spare will result in a degraded RAID state. The LCD
display will show a “Degraded” state and the RAID LED (yellow) will flash. The RAID can be
rebuilt by replacing the failed drive, preferably with the same model of drive. After the new
drive is installed power up the DataPAK and wait for DataPAK to initialize. When the DataPAK
has initialized the LCD display will prompt you to “Add new disk.” Select “yes” (left) and it will
being to rebuild the RAID. There will be a timer in the bottom right corner of the LCD that will
give an approximate time to completion. After the rebuild is finished the DataPAK will need to
be rebooted. A rebuild with 500GB drives will take approximately 3 hours.
The loss of two drives will result in a RAID failure. New drives will need to be inserted, prefer-
ably the same model of the drives that are getting replaced. Open Configurator 3.0 to set up a
new RAID. (see section 4.1.2)
5.3.2.5.1 RAID 5 with Hot Spare
If the RAID 5 is “5 + Hot Standby” then no manual rebuild is necessary. The hot spare will
automatically be added to the RAID. At the end of the rebuild power down the DataPAK
and replace the failed drive. After the new drive is installed power up the DataPAK and
wait for it to initialize. When the DataPAK has initialized the LCD display will prompt you
to “Add new disk.” Select “yes” (left) and that disk will be the new hot spare drive for the
RAID.
NOTE: A degraded RAID 5 will stay mounted and can continue to transfer data. How-
ever, CRU-DataPort recommends disconnecting the unit during a rebuild if at all possible.