Re: Software RAID5 with 2.6.0-test

Måns Rullgård
2003-10-17T17:44:36Z

Bill Davidsen <davidsen@tmr.com> writes:

>> However, I wouln't count on superior performance from software based
>> RAID 5 (ata/fakeraid or otherwise), that is whats real raid controllers
>> are for.
>
> While an overloaded system may benefit from offloaded the CPU
> requirements of RAID, unless you go to a very expensive external unit
> the kernel RAID will usually outperform the inexpensive RAID embedded on
> a controller. The kernel simply knows more about the data needs and can
> can do things a controller can't.

What about the RAID controllers in the $400 category? Surely, they
must be doing something better than the $50 fakeraid controllers.

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