Originally Posted by ionstorm66
If you are going with linux, soft raid is more than enough. In fact most raid cards are slower in hardware raid than softraid, so you are better off using with as a HBA.
Though with softraid a good cpu will help out with RAID 5/6 speeds. There is also a few tuneables to tweak to each setup, but that is after you get it up and running.
I wound not.
Software RAID is not as fast as hardware RAID. Yes, parity calculations on modern CPUS are fast, but without a battery or flash-backed write cache, you're going to have a substantial performance hit.
ZFS setups (Those who need real speed.) use a ZIL and L2ARC to compensate for the lack of DRAM-backed cache.
EMC and others in the dedicated storage space have substantial amounts of DRAM-based cache (20+ GB typically), and now most people have to use SSDs for tiering caching.
Using ZFS, Windows Storage Spaces on a JBOD will almost certainly perform poorly when compared to a hardware-based DRAM cache.
The main weakness of hardware raid is the single point of failure being the RAID adapter, but that is why they are so damn expensive, they are designed to be reliable.