Feizhou wrote:
Ruslan Sivak wrote:
Feizhou wrote:
I do have a SIL3114 chipset, and I think it's supposed to be
supported by device mapper. When I go to rescue mode, I see it
loading the driver for SIL3112, but nothing appears under
/dev/mapper except control. Are there instructions somewhere on
getting it to use my controller's raid?
Your controller only has a bios chip. It has no raid processing
capability at all.
You need to use mdadm. anaconda should be able to let you create to
mirrors and then create a third array that stripes those md devices,
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Anaconda doesn't let me create a stripe raid set on top of a mirror
set. And it doesn't detect it when I do it manually.
Also the bios chip presents additional issues. I believe when I
don't have a raid array set up, it won't boot at all. When I have it
on raid10, I had trouble booting, and when I have it on
concatenation, everything works fine, until a drive is replaced. At
that point, i have to recreate the array, as concatenation is not a
fault tolerant set, and at this point I seem to lose all my data.
It won't boot at all without a raid array setup? That sounds really
funny.
Actually I'm not 100% sure on this, but I think this is the case. I
believe the first time I set it up as a raid10, assuming that linux will
just ignore it. I installed centos by putting boot on a raid1, and root
on LVM over 2 raid1 sets. I had trouble getting it to boot.
Is there a way to get it to use the raid that's part of the bios chip?
Repeat after me. There is no raid that is part of the bios chip. It is
just a simple table.
Yes, I know this is fakeraid, aka softraid, but I was hoping that using
the drivers would make it easier to support raid 10 then with mdadm,
which seems to be impossible to get to work with the installer. I'm not
even sure why the raid10 personality is not loaded, as it seems to have
been part of the mdadm since version 1.7.
Something about device mapper?
You need the fake raid driver dmraid if you are going to set up stuff
in the bios. What version of centos are you trying to install? libata
in Centos 5 should support this without having to resort to the ide
drivers.
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I'm trying to install centos 5 - the latest. How would I go about using
dmraid and/or libata? The installer picks up the drives as individual
drives. There is a drive on the silicon image website, but it's for
RHEL4, and I couldn't get it to work. I'm open to using md for raid, or
even LVM, if it supports it. I just want to be able to use raid10, as I
can't trust raid5 anymore.
Thanks for you help so far,
Russ
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