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?
Michael Klinosky wrote on Sat, 29 Jan 2011 22:33:50 -0500:> I'm setting up a computer that will run 'CentOS 6 server'.Sure about that? This is your first experience with CentOS/RHEL?> But, I can't find any reference to this chip.I can't tell you either. I think the support for this is coming from dmraid. A search for this should reveal more for you. Such drivers are usually not compiled in the kernel at all, maybe in the 2.4 days, there are various methods to use them as a kernel module. In general, people recommend using normal software RAID if you have only a fakeraid controller. And, a second "in general", if you want to find something out about CentOS, looking at kernel.org or for "recent kernels" won't help too much. I suggest you first read a bit about CentOS on www.centos.org before you make your OS choice. Don't get me wrong, I don't want to discourage you, but you should *know* what you get, you shouldn't assume. Kai
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.> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >-- Robert Heller -- 978-544-6933 / heller at deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments
On Sun, Jan 30, 2011 at 5:33 AM, Michael Klinosky <mpk2 at enter.net> 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? > > _______________________________________________CentOS 6 hasn't been released yet. The card that you want to use isn't a real RAID card and uses the PC's CPU for RAID calculations so you're better of using Linux md software raid for this purpose. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532
Kenni Lund <kenni at kelu.dk> wrote:>>Fakeraid is a proprietary software RAID solution, so if your motherboard suddently decides to die, how will you then get access to your data? << Obviously, you restore it from a backup. RAID is not a substitute for backups. Best, --- Les Bell [http://www.lesbell.com.au] Tel: +61 2 9451 1144