Comment 47 for bug 219393

System:
* Ubuntu 8.10 amd64 (not installed yet)
* Intel Software Raid from ICH9R southbridge, ASUS P5K-E motherboard
* 4 hard disks with two raid arrays (one RAID0 array and one RAID5 array).

I am trying to install Ubuntu Intrepid on the fakeraid but none of the solutions worked for me.
Dmraid fails with this error (repeated 8 times, one time per disk and array):
ERROR: isw device for volume "zerovol" broken on /dev/sda in RAID set "isw_baeaijeeda_zerovol"
ERROR: isw: wrong # of devices in RAID set "isw_baeaijeeda_zerovol" [8/4] on /dev/sda

I have tried these:

* Solution to the live CD. I have tried booting with break=top and adding /etc/modprobe.d/libata-options and with /etc/modprobe.d/options but dmraid prints the same error message.

* Using a USB persistent startup disk. I have changed /etc/modprobe.d/libata-options and /etc/modprobe.d/options and rebooted, the changes in that files are permanent, but dmraid fails. So I have followed a workaround to be capable of executing "update-initramfs" without "You are executing from a live CD" limitation. (see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/292159)
I have copied the output initrd.gz to the flash USB stick on /casper/initrd.gz, but dmraid still fails.

Any ideas on how to install Ubuntu to a RAID5 without any other hard disk outside the raid arrays?
I have an older Ubuntu 8.04 already installed and working on the raid0 and capable of read/write the raid5 array, it could help.

Regards.

NOTE: with Ubuntu 8.04 release candidate dmraid works wells, but raid5 kernel module had incorrect name, so I could not install. With Ubuntu 8.04.1 module had correct name, but dmraid did not work well, so I could not install. With Ubuntu 8.10 kernel module is correct, but dmraid has another problem. I cannot remember which stupid think failed in Ubuntu 7.10.
Conclusion: Fakeraid support is too poor, raid is wide extended even in desktop users. We need better support please!!