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From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Jeremy Chadwick <koitsu@FreeBSD.org>
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Cc: "freebsd-questions@freebsd.org" <freebsd-questions@FreeBSD.org>,
	Andrew Falanga <af300wsm@gmail.com>
Subject: Re: Setting up gmirror
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> And what exactly do you classify controllers such as the Promise TX4310
> and the Promise S150 SX4 as?  The TX4310 could be classified as
> "software RAID", but a few of the features are offloaded onto the
> controller.  The SX4 is the same way, but has actual on-board cache.

si it do something by hardware. anyway - i don't think it will actually 
make it faster under FreeBSD (contrary to windoze).

it's simply not worth money.

> You like to declare everything as "software RAIDs", while I like to
> discern the difference between them using (what I believe to be) more
> accurate terminology:
>
> BIOS-level RAID (Adaptec HostRAID, Intel MatrixRAID; "chipset" RAID)
> OS-based RAID (gvinum, ccd, etc.)

what are the difference between 1 and 2?

there are none.