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Old 02-05-2010, 12:35 AM   #1
bobby953
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How to give Centos drivers for Embedded SATA Raid controller on HP Proliant


hey friends

I forced my workplace to forgo windows and opt for linux for web and mail server. I'm setting up Centos 5.4 on it and I ran into a problem. The server machine is a HP Proliant DL120 G5 (quad core processor, 4GB Ram, two SATA drives, 150GB each attached to the hardware RAID Controller on board). RAID is enabled in the BIOS.

Now, I pop in the Centos disk and go through the installation process. When I get to the stage where I partition my hard drive, it is showing one hard drive, not as traditional sda... but as mapper/ddf1_4035305a86......a354a45.
So I looked around and figured that I need to give Centos the raid drivers. I downloaded it from:
http://h20000.www2.hp.com/bizsupport...434ebbcadf9db5

I follow the instructions and download the aarahci-1.4.17015-1.rhel5.i686.dd.gz file and unzipped it using gunzip. Then on another nix system, i do this:
dd if=aarahci-1.4.17015-1.rhel5.i686.dd of=/dev/sdb bs=1440k Note that I am using a usb floppy drive, hence the sdb. After that, during centos setup, i type: linux updates dd
It asks me where the driver is located. I tell it and the installation continues in the graphical mode. But I still get mapper/ddf1_4035305a86......a354a45 as my drive. I tried to continue to install centos on it. It was successfull but when i do a "df -h" it gives me /dev/mapper/ddf1_4035305a86......a354a45p1 as /boot
/dev/mapper/ddf1_4035305a86......a354a45p2 as /
/dev/mapper/ddf1_4035305a86......a354a45p3 as /var
/dev/mapper/ddf1_4035305a86......a354a45p4 as /external
/dev/mapper/ddf1_4035305a86......a354a45p5 as /swap
/dev/mapper/ddf1_4035305a86......a354a45p6 as /home

Well i know why it's giving these, because i set it up that way, but i was hoping it would somehow change to the normal /dev/sda, /dev/sdb. That means that the driver i provided did not work. I have another IBM server (5U) with raid scsi drive and it shows the usual /dev/sda. It also has hardware raid. So i know that there is something wrong with the /dev/mapper/ddf1_4035305a86......a354a45p1 format.

First, is there any way that I can put the aarahci-1.4.17015-1.rhel5.i686.dd (floppy image) on a CD?. I really need to set this up with raid. I know i could simply disable raid in bios and then i would get two normal hard drives sda and sdb. But it has to be a raid setup. Any way to slipstream the driver into the centos dvd? The hp link i provided above, under installation instructions, there are some instructions titled "Important". But I couldn't get it to work. What do they achieve? Guys, any help will be greatly greatly appreciated. Please... I need to get this server up and running soon. I am still and newbie but I learn fast and took on this task, believing I could do it. I am sure with all your help, I will be able to do it. Thanks in advance.
 
Old 02-05-2010, 09:54 PM   #2
ongte
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Location: Penang, Malaysia
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Well if the drive shows up as /dev/mapper/ddf1... it's not REAL hardware raid. It's a FakeRAID. A BIOS driven software raid that sits in the BIOS & works kinda like hardware raid but depends entirely on the OS to support & perform the RAID operations in the CPU without a dedicated RAID controller.

With this kinda setup, you're better off using the Software RAID built into Linux. I suggest disabling the RAID in the BIOS & configure a Linux Software RAID during the installers partitioning tool. If you want a real hardware raid. You need to buy a proper raid controller card.
 
Old 02-06-2010, 10:05 AM   #3
thorkelljarl
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Registered: Jun 2008
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Although it is not called slipstreaming...

It is possible to revise CentOS to make your own version, if that is what you want. Making your own linux is frequently asked about, is usually possible using existing methods and tools, and is in fact the reason that there are so many different linux distributions.

http://256.com/gray/docs/redhat_boot/

This might be interesting if you need to include a module in the kernel, now or later.

http://wiki.centos.org/HowTos/Custom_Kernel

Last edited by thorkelljarl; 02-06-2010 at 12:58 PM.
 
  


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