Hello Thank's for the Reply  But Wooowh, It's all chinese for me .
However i gonna look up and search what to study to have a bit a clue
about what you told. :-)

The only think maybe to add here:

The freeze during formating was actually when installing ubuntu from the
ubuntu install cd. (when using ext 4) . So yes I used X and indeed No
during the formatting process the ext4 kernel code wasn't running.

Since after reseting booting again from cd and restarting the
installation, I saw that the concerned HD on which I installed ubuntu
was indeed formatted ext4 so I think the formating process went fine but
the freeze occured shortly after the formating when the installer
started to write to the just formated drive. But the X still displayed
the formatting step.

As far as I think to understand over here I'll have the guts to say problems 
arrise when ext4 kernel code starts to run and to be used ?
Somehow fast ram and fast HD are trigering a run time error when using ext4. 
Course it maybe as well related to specific hardware combinations. 

I as well noticed on several forums that this problem is not very unique, Off 
course I had to rule out all freezes and so more related to the use off X 
program's , But sorting out all the only common factors are.
Fast HD Fast RAM ext4 . Mostly into server combinations and raid drives (the 
reason why they use fast drives)
On all the situations everything was working fine using ext3 so problems came 
only when using ext4
and yes all very random not frequent well unpredictable whithout any debug 
info. So even if I should use serial console and so I don't think I will have 
any info more since the freeze is total. I even waited sometime more then 2 
hours with a freezed pc The screen stayed on showing the latest opened 
application Date and time stayed exactly on moment it freezed. Removing the 
power from screen and restoring did straight show the same excact screen. 
Pushing all keys on the keyboard did not produce even an error beep from pc 
speaker. 

I've now been busy with this problem since about 2 month's having
several times ext4 then back ext3 and so on. Just cause I tried to have
as much as possible info. But my pc is needed for a lot of other stuff .

So I hope that other persons having similar issues with ext4 are giving
there info about it as well cause I think it will be the fastes way to
track the ext4 kernel problem or bug.

I'm almost shure it is into the ext4 kernel code itself (bud will not
put my head on it )

I used package e2fsprogs ubuntu for it cause I did not known exactly
which packet to use for general ext4 problem.

But it would be nice if someone who has more a clue about it then me
put's it on the right place.

gr christophe

-- 
ubuntu 10.04 ext4 fast Ram and Fast hd's freezes at random
https://bugs.launchpad.net/bugs/632346
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