Solving the “wrong drive detection” in Ubuntu 9.10

Ok, youŕe googled about a problem in Ubuntu instalation and landed here.
Welcome.

1st step: Did you see the /var/log/messages file? So, check if you have a similar log like these lines:

Mar 14 19:25:17 ubuntu ubiquity: ERROR: isw device for volume “Volume0″ broken on /dev/sda in RAID set “isw_cdcjiijice_Volume0″
Mar 14 19:25:17 ubuntu ubiquity: ERROR: isw: wrong # of devices in RAID set “isw_cdcjiijice_Volume0″ [1/2] on /dev/sda

Very simple to solve in my case: A long time ago, I confugured in my desktop a RAID to see how to it works.  After my labs with RAID,  simply format both Hards Disks and remove RAID information:

root@ubuntu:/var/log# dmraid -x

Well, striped  all information about old RAID. Now, the installation of 9.10 works fine.