Proxmox 3.1 grub error on raid 5

[copymaster]

Hi
After i upgraded my proxmox 2.3 cluster to 3.1, i was not able to mount an USB 3.0 harddisk anymore.

So i googled around and found that someone could solve the issue with a complete new installation.
So i downlaoded Proxmox VE 3.1 ISO.

My Servers (4) all have a 3ware raidcontroller (sata) with 4 HDD's (3 HDD raid 5, one spare)

I installed proxmox from iso and all seems to went well. Then after the reboot i got a GRUB error and the system fell to grub-rescue

Then i did a ls (hd0) and system gave me unrecognised filesystem.
Then i thought maybe the iso was corrupted. so i downloaded and burnt it again but with the same result.

Can anyone say something to this issue??

Any help is greatly appreciated

 

[mir]

Does your initrd file system include the driver for you raid controller?
To be curtain add the driver to this file: /etc/modules
And then rebuild initrd: update-initramfs -u

 

[copymaster]

how can i verify this? In all past versions i had no issues.

And the system does hang by grub in grub-rescue.

the update-initramfs -u has to be done within a booted system, or am i wrong?!

 

[mir]

Yes update-initramfs must be run when the system is booted.

Your problem can be narrowed down to two errors:
1) Your devices changes name after reboot
2) Your driver for your raid is missing in the initrd file system

 

[copymaster]

but how can i boot the system when no grub is working? i tried with ubuntu livecd but was not able to chroot into the mounted boot partition from proxmox (system said: /bin/bash not found)- which is correct.

on the other hand: why did the system install correctly? this means that the driver was existent in the kernel during install...
so i think there should be no problem

 

[mir]

Because it installs correctly does not imply that the driver is compiled into the kernel. Remember the installer uses a different initrd file system than the one actually used on the installed system.

Try these links:
http://lena.franken.de/linux/3ware/
http://hwraid.le-vert.net/wiki/DebianPackages

 

[copymaster]

so what do you mean exactly?

I have to boot a live cd, and from the live cd i have to make a dir, then somehow mount /dev/sda2 (which is a LVM2 volume) and the /dev/sda1 (boot)
and then chroot into the dir and uncompress initrd, put driver into it and make update-initrd.

Is that right?

if yes:
How do i mount a LVM2 volume (dev/sda2)? and why is it LVM2 group? i already have a raid

if no:
What do i have to do?

 

[mir]

I would use systemrecuecd for the purpose. It has all tools to mount LVM and RAID.
http://www.sysresccd.org/SystemRescueCd_Homepage