With RAID 4, the parity disk IOPS on write will rate-limit the whole LUN... No big deal on a 4-drive LUN; terror on a 15-drive LUN... George William Herbert Sent from my iPhone On Apr 14, 2012, at 8:04, Chris Adams <cmadams@hiwaay.net> wrote:
Once upon a time, Jeroen van Aart <jeroen@mompl.net> said:
There may be a performance penalty using raid4, because it uses one parity disk. Although that system looks like it can be useful for some purposes it looks less ideal for home use. Also I don't see how it would allow you to install your own OS.
For read-mostly storage, there's no penalty as long as there's no disk failure. The parity drive wouldn't even spin up for reads. -- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.