Build - Copies data from a source drive to a target drive. This option can be used to upgrade a single drive configuration to a RAID1 configuration.
Clear - This option creates the array and writes zeroes to all the hard drives in the array. Do not select this option if any of the selected hard drives contain unrecoverable data.
Quick Init - Creates the array without initializing or overwriting any data on the selected hard drives.
This option can be used if the configuration on the HostRAID controller has been cleared or if you have known good configuration written on the hard drives.
When the "Quick Init" option is used to create an array, the "Build" process is bypassed. While this is the fastest method for creating a RAID array, it is only recommended for use with new drives. Data can be written to the drive, but performance will be impacted while the array is in Quick Init mode.
xeon quadcore 2.5Ghz with 6GB DDR 800Mhz RAM "clear"ing 232GB Hard drive = about 120 minutes