Messages in this thread | | | From | "Roger Heflin" <> | Subject | RE: [OT] 8-port AHCI SATA Controller? | Date | Tue, 31 Jan 2006 14:48:41 -0600 |
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> -----Original Message----- > From: linux-kernel-owner@vger.kernel.org > [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of > Lennart Sorensen > Sent: Tuesday, January 31, 2006 12:58 PM > To: Sander > Cc: linux-kernel@vger.kernel.org; jgarzik@pobox.com > Subject: Re: [OT] 8-port AHCI SATA Controller? > > On Tue, Jan 31, 2006 at 07:50:07PM +0100, Sander wrote: > > Actually, I need 24 ports :-) But 3x SX8 sets me back 540 dollars > > according to pricewatch, which is less than half. > > I know with older promise controllers, it wasn't possible to > run more than 2 in one system as far as I remember due to > some dma issues. Not sure if that applies to the SX8. > > If it turns out the SX8 has issues (like the one pointed out > earlier about number of commands to the card at once) or that > it can't have 3 cards in one system at once, then what? Are > you then out $540 + the cost of a better controller? > Certainly worth finding out before spending the money. > > > Fakeraid controllers are less expensive, and would do too of course > > :-) > > Of course those aren't hardware, and are only meant for small > toy raids for windows users. The rest of use treat them as > ide/sata controllers only. I haven't seen one of those with > more than 4 ports either. If the SX8 is one, then I must > admit I haven't looked at it before. I try to avoid hardware > from promise whenever possible. >
Highpoint has some that I believe are software raidish.
They do have on-board parity generators that are used when you use there binary only modules.
I have heard that they will work with later kernels (2.6.15+) since the highpoint are a standard Marvell chipset, and they seem to be fairly price competitive with JBOD raid controllers, and have some controllers that have more than 8 ports, the price per port may be better on the larger controllers.
Using 3 disk software stripe (linux) or 3 disks software stripe (binary modules) I have got IO rates of 135MB/second sustained over 90-100 GB read/write tests.
Roger
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