Hi all, Let me start off with a little back ground. I am running right now RH9 fully updated on a Dell PowerEdge 1600SC with 512megs of Ram, 18G SCSI HD. I run this at home so this is no critical server, unless you ask my girls when I have it down, I have been debating on upgrading to Fedora until I started looking at CentOS. I have download the ISO and burned them with X-CD-Roast. Here is my question: I tried running the mediacheck on the cd's and it would lock up right before the media check screen appears. I have googled and tried the ide=nodma and other options, but to still no avial. I also ran memtest86, now here is where the kicker is. It did show there was some errors, and these I will check out. But I then got a wild idea and pulled out my 1st CD of RH9, dropped it into the CD drive and at the boot prompt ran media check. RH9 disk 1 checked out fine, so I dropped in the CentOS disk 1 and ran it. It checked out fine and so did all the rest of them. Is this a vaild test?? Or am I just blowing in the wind here?? Thanks for any input into this matter!! Lee Perez Still learning!!!