[CentOS] Serial ATA hardware raid.

Fri Apr 15 17:35:24 UTC 2005
Sean O'Connell <oconnell at soe.ucsd.edu>

On Sat, 2005-04-16 at 01:11 +0800, Franki wrote:
> Hi everyone,
> I'm looking into setting up a SATA hardware raid, probably 5 to use with 
> CentOS 4. I chose hardware raid over software mostly because I like the 
> fact that the raid is transparent to the OS.
> Does anyone know of any SATA controllers that are well tested for this 
> sort of usage?
>  From what I can tell from googling, this is more or less where RHEL stands:
> Red Hat Enterprise Linux version 3 and the current version of Fedora
> support the following SATA chipsets:
>       Intel's ICH5 SATA chipset
>       Silicon Image's SATA chipset
> Does CentOS4 add anything to this as it is based on 2.6 kernel?
> My question upon reading what I found on Google, is if it is true 
> hardware raid, shouldn't the OS not be able to tell it's raid at all?
> I'm assuming that the chipsets listed above are driver based hardware 
> raid? what I am after is a raid array based on true hardware raid such 
> that the OS see's just one drive, and the hardware firmware handles any 
> mirror/striping.

I have used the 6 port LSI Megaraid SATA controller for an application
using an RHEL rebuild (Rocks) with a 2.4 kernel. It simply uses the same
modules as the SCSI flavor (e.g some of the Dell PERC 4 line). It has
worked like a champ (so far), and it wasn't too outrageous priced.

Sean O'Connell
Office of Engineering Computing         oconnell at soe.ucsd.edu
Jacobs School of Engineering, UCSD      858.534.9716 (49716)