Lucid installer creates bad RAID setup

[Matthew Caron]

Binary package hint: debian-installer

Installed 10.04 Beta 2 on to 2 500GB hard disks. Partitions were as follows:

/dev/sda1 1GB
/dev/sda2 The rest

/dev/sdb1 1GB
/dev/sdb2 The rest

/dev/sda1 and /dev/sdb1 were combined into /dev/md0
/dev/md0 was formatted as ext4 and assigned to be /boot.

/dev/sda2 and /dev/sdb2 were combined into /dev/md1
/dev/md1 was selected as physical device for LVM
LVM was set up with all the other expected partitions swap, /, /opt, /var, /home, /tmp

After reboot, splash screen complained about not being able to mount /boot.

Dropped to a prompt to find:
- /dev/md0 had not been started
- /dev/md1 had been started

Started /dev/md0

mdadm --detail /dev/md0 reported that disk 0 was removed and disk 1 was /dev/md1p1

mdadm --detail /dev/md1 reported that disk 0 was /dev/sda and disk 1 was /dev/sdb

I suspect that, somehow, the installer is not using the components which it was told to do, and /dev/md1 is using components which overlap with /dev/md0, thus corrupting the data contained therein and rendering it unmountable.

[Matthew Caron (matt-mattcaron)]

Retested under the RC.

Additional info:

Dropping to a console under the installer shows correct output from mdadm --detail /dev/mdX, so it looks like this is only a problem after reboot, like it's not committing the settings correctly when finishing up.

[Matthew Caron (matt-mattcaron)]

This *might* be fixed in the actual release. I've tested it in a VM and it works as it should. Need to test on real hardware.

[Matthew Caron (matt-mattcaron)]

I finally got back to this.

This is *not* fixed in the actual release.

It is *still* broken in 10.04.01

It works correctly in 10.10.

[Matthew Caron (matt-mattcaron)]

This is actually a duplicate of #591721