[CentOS] RAID support in kernel?

Sun Jan 30 15:01:56 UTC 2011
Kevin K <kevink1 at fidnet.com>

On Jan 30, 2011, at 7:36 AM, Robert Heller wrote:

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

> 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.

The only caveat I can think of is if you wanted to BOOT off of the raid configuration.  The BIOS wouldn't understand the Linux RAID implementation.

But for RAID 1, especially, you probably want a minimum of 3 drives.  A boot drive with Linux, and the other 2 RAIDed together for speed.  That way, the logic to handle the failure of one of the drives isn't on the drive that may have failed.

Of course, if it is the Linux drive that failed, you replace that (from backup?) and your data should all still be available.