Installing on an HP LH4


I have an HP LH4 server and am trying to install redhat 6.0 on the machine.  The problem is that all hard drives are located on the HP NetRaid adapter, and after going to redhat's web site it doesn't seem to support having the boot partiton on a raid adapter.  During the installtion I get the following errors
Partition Check:
VFS: Cannot open root device 8:21
Kernel panic: VFS: Unable to mount root fs on 8:21

I already have NT installed on Raid 10, and I put in a new hard drive set to raid 0 which is where I planned on installing linux.

Anyone know of a way to get linux onto a HP LH4 with a raid adapter (with out losing NT)?


Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Here's the Root Raid HOWTO, but as far as I know the HP NetRAID adapters are not officially supported yet.

The Root Raid HOWTO from the author:
jvieiraAuthor Commented:
Now I don't want to have linux installed on a Raid1,5,... drives.  It will actually be installed on a Raid0 drive, and I'll be booting from a floppy becuase I already have NT installed and I don't feel like playing around with LiLo.  Do I have to take all these steps in the Root Raid Howto.


The Ultimate Tool Kit for Technolgy Solution Provi

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy for valuable how-to assets including sample agreements, checklists, flowcharts, and more!

The problem is that RedHat 6.0 doesn't support booting
from a Raid-Adapter. But you can do the following to
boot from it.

The first thing to do is to create a logical Drive using
the NetRaid Express Tool. You can do this by pressing
CTRL-M during Netraid Init.

Boot from your RedHat CD until you are asked if you
want to install or to update. Use ALT-F2 to switch
to the shell. Now insert

insmod megaraid.o

Switch back to the installation screen and continue
the installation as normal. !! Don't try to load the
Driver for the SYM8xx SCSI Controller !! This Driver
won't work on LH4 at this Time.

After the Installation you have to reboot. You will
get a kernel panic: unable to mount root.. ! at this
point, because Redhat doesn't load the megaraid.o.

!! You should create a inital Ramdisk for booting !!

The next step is to load with the Rescue Disk ->
mount the volume -> mount the initial Ramdrive
via loopdevice -> copy the megaraid.o into this
file -> modify the rc file to load the driver ->
reinstall the kernel using lilo.

If you need further assistance feel free to contact me.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
If you would like to know howto boot without a floppy, but with lilo as secondary and NT OSloader as primary bootloader, feel free to contact me. I have a document somewhere about this with a solution. And as far as loading the symbios module, I managed to get it working. But I don't think it's that stable yet. :)
jvieiraAuthor Commented:
I just got Red Hat 6.1 which supports HP NetRaid.  Thanks for all the help.


Can you send me your document.  Booting linux from a floppy is slow and it is only going to be on this machine for a week or two, and I don't feel screwing up my NT installation.  I'll set up a seperate question if you want to give you some points.


It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.