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 <cmad...@hiwaay.net> wrote: > Once upon a time, Jeroen van Aart <jer...@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 <cmad...@hiwaay.net> > Systems and Network Administrator - HiWAAY Internet Services > I don't speak for anybody but myself - that's enough trouble. >
