Created attachment 642181 [details]
anaconda-tb-Og2Hmj log showing rsync error message "No space left on device"

The attached log shows the rsync does indeed report "No space left on device":

[snippet from attached anaconda-tb-Og2Hmj]
Nov 10 08:42:40 localhost program: rsync: writefd_unbuffered failed to write 4 bytes to socket [sender]: Broken pipe (32)
Nov 10 08:42:40 localhost program: rsync: write failed on "/mnt/sysimage/usr/share/locale/uk/LC_MESSAGES/gtk20.mo": No space left on device (28)
Nov 10 08:42:40 localhost program: rsync error: error in file IO (code 11) at receiver.c(322) [receiver=3.0.9]
Nov 10 08:42:40 localhost program: rsync: connection unexpectedly closed (1657900 bytes received so far) [sender]
Nov 10 08:42:40 localhost program: rsync error: error in rsync protocol data stream (code 12) at io.c(605) [sender=3.0.9]
Nov 10 08:42:40 localhost anaconda: rsync exited with code 12

Simply displaying the error messages from rsync in a window might be sufficient. The problem is that iutil.py has two functions, neither of which quite does what is needed: Capture stderr in a buffer _and_ write stderr to a file.

ISTM, the functions could be generalized with one function that does it all:
1. Capture stdout and/or stderr in a buffer.
2. Write stdout and/or stderr to a file.

$ less -N anaconda-18.28-1/pyanaconda/iutil.py
...
     85 ## Run an external program and redirect the output to a file.
     86 # @param command The command to run.
     87 # @param argv A list of arguments.
     88 # @param stdin The file descriptor to read stdin from.
     89 # @param stdout The file descriptor to redirect stdout to.
     90 # @param stderr The file descriptor to redirect stderr to.
     91 # @param root The directory to chroot to before running command.
     92 # @return The return code of command.
     93 def execWithRedirect(command, argv, stdin = None, stdout = None,
     94                      stderr = None, root = '/', env_prune=[]):
...
    197 ## Run an external program and capture standard out.
    198 # @param command The command to run.
    199 # @param argv A list of arguments.
    200 # @param stdin The file descriptor to read stdin from.
    201 # @param stderr The file descriptor to redirect stderr to.
    202 # @param root The directory to chroot to before running command.
    203 # @param fatal Boolean to determine if non-zero exit is fatal.
    204 # @return The output of command from stdout.
    205 def execWithCapture(command, argv, stdin = None, stderr = None, root='/',
    206                     fatal = False):
...

This bug is for the related problem on the DVD:
Bug 875422 - Anaconda fails with Could not run transaction if not enough disk space

*** This bug has been marked as a duplicate of bug 868755 ***