[Bug 259540] Re: Wubi - "No root file system is defined" error

[Stefano Bragaglia]

I've tried several Ubuntu flavors (Gnome, KDE and XCFE, both x86 and
AMD) both 9.04 and 9.10 on Windows 7 RC (Ultimate) ITA and Windows 7
Professional ENG and I always get the aforementioned error (without
experiencing the fdisk warning):

   No root file system is defined.
   Please correct this from the partitioning menu.

I tried several combination of "Run as admin", compatibility mode and
language to install (since someone said Wubi was able to complete
installation with these parameters) but I had no luck...

I also tried to set up a straight dual boot configuration but I always
get the same error message as above...

I've read somewhere (sorry, I didn't bookmarked the source) that it depends on 
some minor changes on NTFS made by Microsoft... I don't know if this is true, 
but I noticed that even if I told the Windows Installer to create only one 
partition, it created two partitions instead where the first is hidden and is 
100 Mb in size more or less (it actually depends on the size of the disk) and 
the second is the actual partition I was expecting... The first partition is 
used to store system file in case you need to recover the system in case of 
failure (on former versions of Windows you were supposed to use the Windows DVD 
instead)...
This is what you get by default unless you are installing on a disk with 
several already existing partitions or you bypass the standard procedure and 
you take control of the process...

So I came up with this idea: is the target partition hardcoded in Wubi? 
I mean, is Wubi always trying to install Ubuntu on disk 0, partition 0, etc. by 
default?
If this is true and you have the hidden partition on your machine, then the 
Ubuntu installer called in second step by Wubi after reboot fails because it's 
performing its job on a partition different than the one expected...

I hope this helps, since I really need to install Ubuntu... In case my
explanation was not clear enough (very likely) I can provide further
details...

Thanks in advance,
 Stefano

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Wubi - "No root file system is defined" error 
https://bugs.launchpad.net/bugs/259540
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[Bug 259540] Re: Wubi - "No root file system is defined" error

[Stefano Bragaglia]

MtMCooLBG, thank you for sharing your opinion!

I had no problem installing Ubuntu with Wubi on the same machine when the O.S. 
was Vista...
That Vista installation was the one that shipped with the notebook: that 
installation had 2 partitions both visible...
One was the system, the other was the "dump" of the Vista's Setup DVD that 
shipped with the notebook...

Moreover, the Ubuntu version I installed succesfully on that machine
were 8.10 and 9.04... I read that 9.10 uses a different partitioning
system along with Grub 2 that is still in beta... It could be a possible
cause of the problems we experience but I'm not so sure, since I had no
luck installing 9.04 on the same hardware with Windows 7...

Consider also it could not be Wubi's fault at all, since I also had no
luck with dual booting: the partition manager sees my hard drive as
completely empty... Is it Ubiquity's fault then?

I also had a try on my desktop computer: it has Windows 7 RC x64, 2 SATA2 HD in 
RAID 0 and a common HD (both with NTFS)...
Wubi hanged after rebooting, not finding any drive... Ubiquity alone recognized 
all partitions and made me resize the normal drive to leave some space for the 
2 usual linux partitions... Anyway, despite the install completed successfully, 
I was not able to bootstrap Linux (still trying a few tricks with EasyBCD I 
gathered on internet)...

I hope this will help someone to sort things out and solve the problem, thanks 
in advance,
 Stefano

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Wubi - "No root file system is defined" error 
https://bugs.launchpad.net/bugs/259540
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