"No root filesystem defined" in 10.04 Alternate CD install

Asked by Kent McNaughton on 2010-05-20

I have the same error message as question 111633. "No root filesystem is defined" with the 10.04 Alternate CD, manual partitioning (because I'm setting up RAID1 and LVM). Can't find where in the psuedoGUI to choose a filesystem (presumably ext4). One of the disks had a working 10.04 Desktop (non-RAID) before I borked the install. The other had a 8.10 Desktop on it.

I did check the md5sum against the download and also ran a check of the CD from the install menu before starting the install. The md5sum checked out and the test of the CD finished successfully. (To burn this CD I used wodim at speed=4, since several Desktop CDs I ruined using the GUI burner).

The disks are two identical Samsung 1TB SATA drives.

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kpk187 (kpk187) said : #1

In the partitioning menu in the alternate installer, you may notice a "mount point" option. In the same menu for selection to set the file system type. You will want to set the "mount point" to "/". This will tell the installer that the partition is meant to be the root partition.

Any partition I try to select in the installer [!! Partition Disks ] window comes back with "Partition in Use" No modifcations c/b made to the partition.. In use by software raid device md0 or In use by LVM volume group volumename. Am I in the right place? (going back just gets me here anyway). If so how to get the partition release by the software so I can set the mount point? BTW: I didn't see an option for setting mount point earlier in the install.

Best kpk187 (kpk187) said : #3

You may wish to read the Ubuntu installation guide:

Some of the information there should help you with the alternate installer. Keep in mind that some of the pages like "Loading Missing Firmware" are outdated and are included for rare cases that they are needed.

If you still are having difficulty installing Ubuntu, feel free to ask for more help.

Thanks kpk187, that solved my question.

Thank you for your help. And for your gentle advise regarding the manual ;-)