Comments on: Disabling dmraid (fakeraid) on CentOS 5

By: Brian

Brian — Tue, 01 Feb 2011 04:28:06 +0000

Another potential cause of this problem is the multipath daemon.

http://polibyte.com/blog/multipath_blocking_mdraid

By: dichar

dichar — Thu, 13 May 2010 14:00:25 +0000

Hello;
I couldnot get the drive hot, getting the same error as above, “device or resource busy”.
I tried to use
mkinitrd –without-dmraid /boot/NO_DMRAID_initrd-2.6.18-164.e15.img 2.6.18-164.e15

but I got the error No modules available for kernel “2.6.18-164.e15″.
Any idea how to work arround this?
Thanks

By: Mitch Sanders

Mitch Sanders — Wed, 05 May 2010 15:58:37 +0000

Hi Brandon,

Kudos and massive respect goes to you, after around 3 hours of googling and 2 hours of f’ing around with dmraid being enabled on a new server with “fakeraid” intel card. You are an absolute lifesaver.

Thankyou Thankyou Thankyou!

Cheers,
Mitch

http://www.TheMarketingDeviant.com

By: Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org

Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org — Sun, 04 Apr 2010 14:59:38 +0000

[...] http://www.brandonchecketts.com/archives/disabling-dmraid-fakeraid-on-centos-5 “Both of the drivers will attach themselves to all the drives with any partitions sets as type fd (Linux raid autodetect).” [...]

By: Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org

Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org — Sun, 04 Apr 2010 14:52:12 +0000

By: Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org

Linux Fake-RAID vs. Software RAID | LOTUSCONNECTIONS.org — Sun, 04 Apr 2010 14:50:59 +0000

[...] http://www.brandonchecketts.com/archives/disabling-dmraid-fakeraid-on-centos-5 [...]

By: Jjara

Jjara — Fri, 19 Mar 2010 20:25:04 +0000

Hi. I have followed the instructions, including riche’s tip, but problem persist. Some advice?

How can i probe that dmraid is down?

Thanks.

By: Eric

Eric — Mon, 01 Mar 2010 02:23:06 +0000

Thanks a ton. 2.5 years later and it’s still valuable information.

By: ryche

ryche — Mon, 26 Oct 2009 03:15:20 +0000

Hi there, on RHEL5 2.6.18-164.el5, the –omit-dmraid was replaced by –without-dmraid.

great article, helped a bit!

By: Brandon

Brandon — Sun, 27 Jul 2008 21:17:19 +0000

Mr A – With software raid, I typically configure a 100 MB or so /boot partition as RAID 1, so that you can boot off any of the disks in the event of a failure.