DANGER!!! Problems with 10.04 installer (RAID devices *will* get corrupted)

[Alvin Thompson]

On 04/22/2010 12:18 AM, Christopher Chan wrote:
> You mentioned md0 aka a Linux software raid array and therefore do not
> have any 'raid' devices setup in BIOS. The 'raid' bios will not,
> therefore, attempt to do anything on your disk. Otherwise, it would have
> trashed your md0 a long time ago. Please STOP adding comments to those
> bug reports because you have just completely confused the issues.
> #191119 (sorry Xander - missed the part where it says Alvin made the
> comment) has NOTHING to do with what you are currently seeing.

I don't know how many different ways I can explain this, but here's 
another try.  This is the relevant quote from the bug report:

  Select partition on alternate, non raid, drive to install Ubuntu on.

He was not installing to a partition on the RAID array, yet the 
installer not only wrote to the array, but it wrote directly to a device 
in the array.  You know this because on reboot his controller could no 
longer assemble the array.  If you read my original post all the way 
through, I've already explained that the installer can incorrectly 
detect a file system on a device that's a part an array under the right 
circumstances.  The installer than writes to that file system, 
corrupting the array.

Please, tell me you understand now.