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Old 10-24-2005, 06:52 PM   #1
r_sherman
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Linux cannot detect preexisting raid0


Hi, I am totally, completely new to Linux. I am trying to do a dual install of WinXP and ubuntu. My hard drive situation is like this:

-two SATA raptors plugged into my motherboard's controller, arrayed in RAID0, partitioned like so:
C: ntfs, windows
D: not yet formatted, this is where I want linux
E: ntfs, data
(The above partitioning was done by the WinXP install utility)
The mobo is an asus K8V-X and I think the controller chip is a VIA 6420.

-two barracudas plugged into a SIIG PCI-to-SATA board
F:, G: both for data, NON-raid


The Problem: When I get to the point where I tell it where to install, it sees all four hard drives, but doesn't see the RAID0 arraying, or the partitions I've set up. It sees the raptors as separate and unformatted. I want it to go on the D partition but it's not there.

I have Ghost images, data, etc. backed up in duplicate so I am willing to start all over using a linux partitioning tool if necessary, but the troubling thing is it didn't even detect the array.

Is the problem that the raid drivers work in windows but not in linux? Is it not going to be possible to use raid if I can't find linux drivers?

If there's a better choice than ubuntu for this, let me know. The only reason I picked it is it seems to be popular.
 
Old 10-25-2005, 12:06 PM   #2
johnson_steve
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that's not a real partition table. to use raid in linuxyou don't need a driver for your controller/drives it's built in to the kernel and works with any block device. you just need raid turned on in the kernel and have the partition types for the partitions that make up the raid set to "linux raid autodetect"
 
Old 10-25-2005, 05:02 PM   #3
KnightHawk
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Quote:
Originally posted by johnson_steve
that's not a real partition table. to use raid in linuxyou don't need a driver for your controller/drives it's built in to the kernel and works with any block device. you just need raid turned on in the kernel and have the partition types for the partitions that make up the raid set to "linux raid autodetect"
Actually to do what you want to do, you are going to need to make sure the kernel has a driver for your onboard raid controller, and the driver will need to be compiled into the kernel or loaded as module.

What the above poster is actually referring to is linux software raid. Which is probably better than what you have with your onboard controller but it will not be compatible with windows. To get that to work as the above poster states with consideration to what you want to do would also require the driver be in the kernel for your controller.
 
Old 10-25-2005, 05:06 PM   #4
KnightHawk
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So... if your willing to do away with your windows partitions, I'd highly recommend turning your raid array off. And using the raid array as just another non-raid IDE controller. With any luck linux at least supports that mode of operation with that controller.

Assuming you get past that, then linux should see each of the harddrives as seperate drives. At that point you need to google "linux software raid howto" and read up on how to configure a linux software raid. Ubuntu may have more specific instructions for this.
 
  


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