Most energy efficient (home) setup

George Herbert george.herbert at
Sun Apr 15 06:28:26 CDT 2012

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 at> wrote:

> Once upon a time, Jeroen van Aart <jeroen at> 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 at>
> Systems and Network Administrator - HiWAAY Internet Services
> I don't speak for anybody but myself - that's enough trouble.

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