The repodata directory on all 6.5 isos that I have sampled have an issue where the file names don't have extensions resulting in a yum repo error on installation just after disk partitioning. This error prompts you with the choice between either allowing you choose another repo or to exit the installer. I remedied this issue with the following:

[root@testserv /root/test/centos]$ find repodata/ -type f -not -name repomd.xml -exec sh -c 'mv {} -v $(grep -Po "(?<=href=")({}.*?)(?="/>)" repodata/repomd.xml)' ; ‘repodata/b4e0b9342ef85d3059ff095fa7f140f654c2cb492837de689a58c581207d9632’ -> ‘repodata/b4e0b9342ef85d3059ff095fa7f140f654c2cb492837de689a58c581207d9632-c6-x86_64-comps.xml’ ‘repodata/5af8199bd0ffb441c34ef946582d0d06c1ad770755e631690771e0bceb0ad222’ -> ‘repodata/5af8199bd0ffb441c34ef946582d0d06c1ad770755e631690771e0bceb0ad222-other.xml.gz’ ‘repodata/594d4bb4a79ed01d66635adbcf76c45ca4a85b30fc3e3c3c28316e64f0a83f21’ -> ‘repodata/594d4bb4a79ed01d66635adbcf76c45ca4a85b30fc3e3c3c28316e64f0a83f21-filelists.sqlite.bz2’ ‘repodata/6ac72f497df511cc2dc584eaa59779884fc572c1618e7c62dbd631ab8babf53d’ -> ‘repodata/6ac72f497df511cc2dc584eaa59779884fc572c1618e7c62dbd631ab8babf53d-filelists.xml.gz’ ‘repodata/0dafccfdbf892f02acca8267ade4bdcee7280a682e65dc7e29145f3341fd7a8c’ -> ‘repodata/0dafccfdbf892f02acca8267ade4bdcee7280a682e65dc7e29145f3341fd7a8c-primary.sqlite.bz2’ ‘repodata/ca525c73086186bfcb81ad9edd45796026dac7e4e50524e0f2daf901532aaf66’ -> ‘repodata/ca525c73086186bfcb81ad9edd45796026dac7e4e50524e0f2daf901532aaf66-c6-x86_64-comps.xml.gz’ ‘repodata/fdd542ef36b0cde54ee0521fae90b98911db06483163aa1c049995b6d109349b’ -> ‘repodata/fdd542ef36b0cde54ee0521fae90b98911db06483163aa1c049995b6d109349b-other.sqlite.bz2’ ‘repodata/495d3964f864fbab835ea1afb8a5272352cd12ded13d607205109fefaddd0ab6’ -> ‘repodata/495d3964f864fbab835ea1afb8a5272352cd12ded13d607205109fefaddd0ab6-primary.xml.gz’

The repomd.xml file has the correct names for the files, the files in this directory just have the sha sums as their file names, not the full path name as defined in the xml file. This results in yum breaking just after partitioning. The only way I was able to get around this before modifying the iso file was to follow the onscreen prompt and enter in a valid mirror as an HTTP/FTP host. This issue is currently afflicting all variants of 6.5.

As of this writing the two test files I just confirmed have this issue are:

http://mirror.cisp.com/CentOS/6.5/isos/x86_64/CentOS-6.5-x86_64-minimal.iso http://mirrors.bluehost.com/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-minimal...

Last night I downloaded the minimal, livecd, livedvd and netinstall isos from 10+ mirrors. All of them triggered the error from the files not being named correctly.

--Shields