On 07/10/2017 06:31 AM, Bjoern Voigt wrote:
What is the main advantage of hardware RAID over software RAID on Linux? (I think performance and that a hardware RAID can automatically boot from the second disk, but I am a newbie in hardware RAID and so not sure.) Offloading to hardware is always about speed and less load on the CPU. Thanks, Peter and Peter.
So I will go for software RAID.
That is the correct choice. Unless you are saturating you I/O bandwidth and need the incremental boost that a battery supported hardware raid card with bios set to write-back caching -- then Linux software raid is the way to go. Even in the 386-33MHz days, software raid required minimal clock cycles to carryout raid functionality and the load was negligible. Step forward 2 decades with quad-core processors running in the GHz range and software raid is so far down in the noise that it isn't a load or performance issue at all. Best thing about it -- if your Server dies, etc.., you can just pull the array (or individual disks) and throw them in any other Linux box regardless of hardware -- and you are good to go. That's a whole lot of benefit. -- David C. Rankin, J.D.,P.E. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org