Description of problem: I'm trying to install Fedora 7.90 from a DVD on my Dell Optiplex GX270 (replacing, not upgrading an older unimportant Fedora core installation that was wiped during a crashed Fedora 7 installation). During the checking package dependencies (the progress bar does not reach completion), I consistently get the error: "An error occurred unmounting the disc. Please make sure you're not accessing /mnt/source from the shell on tty2 then click OK to reboot." When I switch to tty2 (ctrl-alt-2), I am able to determine that the current working directory 'pwd' is '/'. Intriguingly, issuing the command "ls" seems to hang this shell (which could not be recovered with ^C to kill the command or ^Z to put it in the background). Version-Release number of selected component (if applicable): Installation from Fedora 7.90 DVD How reproducible: Completely reproducible Steps to Reproduce: 1. Boot from FC7.90 installation DVD 2. Select install options 3. Tell installation to install Actual results: Error message listed above Expected results: Installation to proceed to writing to the ext3 / partition Additional info:
I have been able to work around this problem by adding "noshell" to the boot commands. I'm having additional problems later on: File "/usr/lib/python2.5/pickle.py", line 971, in load_string self_append(rep.decode("string-escape")) File "/usr/lib/python2.5/pickle.py", line 858, in line dispatch[key](self) ....
HAve you verified your media using the mediacheck/
The media passed the mediacheck that runs prior to install (I presume it check the entire DVD). I did not check the SHA1SUM of the downloaded iso image used to burn the DVD. I currently believe that the media was at fault as the install logs (under "noshell") complained about not being able to recognize the format of some png images. Because I was having DVD issue, I tried to and successfuly installed Fedora 7 using the LiveCD (which I did test via SHA1SUM). The Fedora 7 DVD iso, which I also only checked via the media test, had also given me a lot of grief. So sorry for the noise. But I am curious as to why the media test prior to install didn't flag either DVD as bad--does it use a less sophisticated algorithm than SHA1SUM?.
Unfortuantely, it's just that different access patterns cause drives to act differently. The medaicheck is an md5sum across the data area of the CD -- but sometimes complete linear reads work fine and it's only seeking back and forth across the disc that causes problems :( I'd suggest trying different DVD media and/or burning at lower speeds as often that helps in cases like this.