Anybody with experience on other DMR models or this one may be able to offer some help. I have the Panasonic DMR EH50, it comes with a Samsung 80gig 5400 rpm drive which while being a good unit does make quite a high pitch sound. I also have a Seagate 80gig 7200 rpm drives with is much quiter so I tried to replace the original. While the original has the cable selecter jumper set, the Seagate would olny be seen if it was set to master. When set to jumper selected an error message "HDD NG" came up, I assume this to mean Hard drive no good. However, the EM50 never gets past a long "Please wait" or "Self Check" or "Hello" message. It is as if the Seagate is not responding. I tried fitting the Seagate fully formated with Fat32 and and 4k clusters and also after an FDISK remove partition so that it was completely raw. Some posibilities are: It checks for the manufacturer though I think this is unlikely. There is a command incompatability, unlikely but I have seen it happen before in embedded situations. It does not like 7200 rpm but how would it know. It needs the Hard drive to have something specific already on it or the cluster size may not be 4k. There may be a button press sequence needed to force a format at startup. Can anybody help. Regards, John.