I have a Yamaha cdr-hd1300 that was purchased with a 80GB hard drive. The device is easily upgradeable to a larger ultra ATA hard drive, but it will only recognize 137GB. I upgraded to a 250GB hard drive and, sure enough, only 137GB is recognized. I’m new to the forum and read that this 24-bit(?) addressing problem can be resolved in a computer in several ways. Yamaha will offer no support for this type of upgrade. Any suggestions for ways I might enable my audio component to see closer to the 250GB drive now installed? I’ve googled “bios upgrade for Yamaha CDR-HD1300” and “Yamaha CDR-1300 bios”, etc, to try to obtain some info on the bios, but no useful results. Any suggestions will be greatly appreciated. thanks.