Originally Posted by h4x0rInSilence
I reccomend raid 5 because if one of your drives gets nuked you dont loose any data .
Mind you this means you cant use all the space on the drives because some is reserved for backup.
Mmmmm. I disagree. Remember that you need 3 drives for a RAID 5 array. And it's slow due to the calc's the controller has to do to with regards to Parity, or spreading the data across the 3 drives.
Ok RAID 5 is all good but RAID 1 provides the same fault tolerance with two drives instead of three and two drives will not fail at the same time. And if I had to consider RAID 5 i'd rather go to RAID 10, which the OP has the option to do.
The only RAID array that doesn't provide any fault tolerance is the RAID 0 array. All the other arrays will give you protection of data should a drive, or in some arrays, more than one drive, fail.