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Old 06-26-2007, 02:09 PM   #1
Jukas
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RHEL 4 WS & onboard raid controller problem


I have a supermicro 1u server that I want to setup a RAID1 array on. I can enable the onboard raid controller in the bios as either the Intel ICH7R or Adaptec controller, and can create the mirrored array just fine.

When I try and boot into rhel 4 setup however instead of it only seeing 1 drive as I expect, it sees both of the sata 500gb drives and only gives me an option for to create a software raid array which isn't what I want.

I was under the impression that hte 2.6 kernel recognized that chipset and raid controller, but could it be as simple as having to provide a driver anyways?

I've setup tons of raid systems on Win32 based systems, but this is my first under linux.
 
Old 06-28-2007, 09:22 AM   #2
ramram29
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you may need to include and load the driver (module) in your initrd ramdisk as the system boots. These so called raid motherboards are not really hardware raid, all they do is provide a little chip that provide some i/o resources when copying from one disk to the other; you still need a windows driver to make it work by default. linux software raid is very good and I would recommend it over the hardware raid - for me it's easier to recover using linux software raid. look and see if there is a linux module for this raid chip.
 
Old 06-28-2007, 09:26 AM   #3
ramram29
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I just looked and as I suspected, even Intel recommends to use linux raid instead.

http://www.intel.com/support/chipset.../cs-020663.htm

If you want true raid then get yourself a $400 raid card such as a 3Ware or Adaptec. hence, more expensive than the motherboard itself. don't be fooled by all these new motherboard that come with raid and with a new model number - they are not true raid. they're just trying to sell you.
 
Old 06-29-2007, 12:03 AM   #4
Jukas
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Thanks for the info, I had a feeling it was a driver issue but I just wanted to be sure I wasn't nuts

Fortunately the client decided they really want hardware raid, and have opted for a 3ware 9650SE controller.
 
  


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