Hi all
I want ask for something about this msg
Error on computer when I tryed instal Ubuntu 12.04.

I have a black screen with this texte

Data 3.00 cmd c8 /00 /08 ;00;00;00;00;00/e0 tag 0 dma 4096 in

Failed command : READ DMA
Buffer 1/0error on device sda ,logical block de 0 a 7 dma 33 84 in

I want to know what this msg
Thank you every body for your help

You marked this thread at solved, it would be nice if you post how you solved your problem, so that others with the same problem can benefit from your solution.

this was the 1st Ubuntu that did work for me ) in 5 yrs . every thing works , even plays DVD , I am finally happy . lunix has caught up to Window 98SE and is comfortable to use as my XP . no newer win systems. ) needed
intel G45 chipset , dual Pentium,
gonna try it on an FIC AM37 mother BoarD , ATHLON 2g next

Sounds like your disk drive is dead. Try replacing it with another.

Note: googling for "Failed command : READ DMA" gives a good number of posts with solutions.

i,2, find that ubuntu 12.04 works as well as xp. that's why my other desktop is staying on 10.04.

I am still working with Ubuntu 10.10, no problems there.My problem has always been the upgrading to a newer version. Upgrading over the internet doesn't work, it always ends up in disaster, so if (and I say if) I want to upgrade to a newer version I always save all my stuff, wipe out the whole partition and install the new Ubuntu in that partition and put my saved stuff back in. Now, I don't do that every six months or so because it's well...
I have a multiboot system and once in a while I do upgrade to a newer version but only when I feel like and BTW since my PC's are 6 years old (Desktop-Laptop) I wonder if the newer Ubuntu's will still work on my machines, but I am pretty sure I'll give it a try.

Both, 10.04 and 10.10, have reached their end of life and are unsupported. You should upgrade to a supported version, so that you get bugfixes and, more important, security updates.

12.04.1 LTS
with the " Long Term Solution " I do not have to worry about relearning for 5 yrs. This was the only reason I even retried Ubuntu .... after it did not work in previous editions ..The learning experience was not that involved . Like early windows , it is easy and functional . I finally got what I wanted , affordable and easy to use functionality that will be good for years to come . I read alot about how people did not like this GUI , but it works , and does not slow down the computer system .