Created on: May 19, 2013
Last updated: May 5, 2017
The time required to rebuild the RAID 5 volume depends on the capacity and speed of the drives and whether or not you will be using them while they are rebuilding. A typical rule of thumb if you're not accessing the data during the rebuild process is roughly 3-4hr/TB.
If the volume was heavily loaded when the drive failed and/or if the data is accessed at all during the rebuild, the time can double to 6-8hr/TB.
NOTE: We recommend leaving the power on throughout the rebuild process.