On Mon, 2008-04-07 at 14:38 +0300, Ioannis Vranos wrote: > Hi, I had downloaded CentOS 5.1 x86 DVD image, and although it passed > sha1sum or md5sum test and I burned it verifying it, installation failed. > > Also if I recall correctly, when I tested the medium during install, it > failed although as I said the media was verified. > > ==> The same things happen with Scientific Linux 5.1 x86 installation > DVD, so perhaps it is a Red Hat EL 5.1 x86 DVD issue? Another possibility is a hardware related issue. In another thread in the past, Johnny suggested adding 300K of pad to the ISO image. I use cd-record. I did some testing. I just yesterday found the floppy that contains my notes on the results. I will be posting a [SOLVED] to that thread (I'll find it later) that discusses this. In a nutshell: some drives have trouble reading the tail end of the recording on the media. I tested older ones (sounds like you might have one) and a newer Lite-on. Some worked fine, others failed. Using dd to append 300K of zeros (from /dev/zero) may fix you issue if the problem is this one. Symptoms are erratic because the install continues until it receives notification of the read error, which is deferred by some indeterminate time. > <snip sig stuff> HTH -- Bill