topic Re: DL 180 G5 + RAID 10 + RHEL in Operating System - Linux

DL 180 G5 + RAID 10 + RHEL

Bob Chojnacki — Tue, 07 Jul 2009 19:41:47 GMT

Hello,

Does anyone have experience installing RHEL 5.x on a DL 180 G5? I have 4 same size SATA drives. If I set up for no RAID, then RHEL sees 4 drives. If I set up RAID 1 on the drives in pairs, then it sees the two RAID 1 drives, and I can install RedHat, but it does not boot up, but just hangs. If I set up the 4 drives as RAID 10, it does not see the RAID 10 drive, but sees the 4 individual drives. I would like to install as RAID 10 if possible.

Thanks,

Bob

Re: DL 180 G5 + RAID 10 + RHEL

Steven E. Protter — Tue, 07 Jul 2009 19:52:32 GMT

Shalom,

Red Hat has a problem booting off of complex hardware RAID. If I remember correctly it can not be booted off Raid 5 at all.

The way to go here is as follows:

Build 1 Raid 1 drive based on hardware raid. Install the OS on that.

Build all remaining drives into a raid 10 hardware raid.

Your system will see two drives, and and run very well off the raid 1 for the OS.

SEP

Re: DL 180 G5 + RAID 10 + RHEL

Bob Chojnacki — Tue, 07 Jul 2009 20:05:54 GMT

Hi Steven,

So what you are saying is that RedHat can not recognize a RAID 10 drive? I am sorry to hear that, because I was hoping to boot off of RAID 10. I only have 4 drives, so I can not do a RAID 1 and a RAID 10. I can make two RAID 1 drives. I tried two RAID 1 drives, but RedHat would not boot off of my RAID 1 drive. I had RedHat combine the two RAID 1 drives as 1 big RAID 1 drive, but I guess that might be too complex for it.

Thanks,

Bob

Re: DL 180 G5 + RAID 10 + RHEL

David Claypool — Tue, 07 Jul 2009 20:35:53 GMT

What RAID controller are you using?

Re: DL 180 G5 + RAID 10 + RHEL

Bob Chojnacki — Tue, 07 Jul 2009 21:17:48 GMT

When it boots up it says HP Embedded SATA Controller. When I open the box, the SATA cables go directly to the motherboard. I am not seeing anything in the regular BIOS setup -- not sure where to look in there. When I press F8 to get into the RAID setup it does not give a clue.

How do I find out?

Thanks

Re: DL 180 G5 + RAID 10 + RHEL

Bob Chojnacki — Tue, 07 Jul 2009 21:30:25 GMT

The bootup sequence also says

ICH9R SATA RAID Controller

Re: DL 180 G5 + RAID 10 + RHEL

Bob Chojnacki — Wed, 08 Jul 2009 18:31:44 GMT

Never mind. The "Hard Drive RAID" setting in the BIOS lead me to believe that this box had hardware RAID. It doesn't.