[CentOS] RAID support in kernel?

Sun Jan 30 13:36:30 UTC 2011
Robert Heller <heller at deepsoft.com>

At Sat, 29 Jan 2011 22:33:50 -0500 CentOS mailing list <centos at centos.org> wrote:

> Hello.
> I'm setting up a computer that will run 'CentOS 6 server'. The MB is an 
> Asus with a hw raid controller (Promise PDC-20276), which I want to use 
> in RAID-1 mode. I noted (from a MB website) that it also needs a driver 
> - which is probably why it's called a 'fakeraid'.
> So, I've been trying to determine if any recent kernels support this 
> chip. Using google.com/linux, I found lots of hits dating about 2002 - 
> 04, and referencing the 2.4 kernel (which had the driver compiled into 
> it). But, nothing newer.
> I checked kernel.org and kernelnewbies.org - I see that raid-1 is 
> supported. But, I can't find any reference to this chip.
> How can I find out what drivers are compiled into a given kernel? Or, 
> basically what hardware a given kernel supports?

Many of the SATA (so-called) hardware raid controllers are not really
hardware raid controllers, they are 'fakeraid' and requires lots of
software RAID logic.  You are generally *better off* to *disable* the
motherboard RAID controller and use native Linux software RAID.

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Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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