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(((I hadn't before now heard that lots of hosts choke over a Crc per block. I had been told that an Atapi Pio INTRQ per block offers increased immunity to ground bounce, crosstalk, etc.: the extra handshakes make a system observably more robust when you're assaulting it with electrostatic charges.))) The controller in your PC can handle intra-command terminations. Where I ran into problems was with "home-brew" controllers in chipsets for CE appliances and Set Top Boxes. That my drive was the only one failing this way didn't help matters (we all know that it is a device problem when the controller designer doesn't read the spec.) As for ESD robustness, I'll take UDMA any day. The CRC protection will at least tell you if bits got flipped on the cable. Extra handshakes? PIO has no handshaking at the hardware level other than IORDY, which hasn't been asserted by a device in years. Even the software handshaking is marginal as the only real integrity problem it will detect is data underrun (host reads status register to get command ending status and DRQ is still asserted). Matt Rooke [EMAIL PROTECTED] Subscribe/Unsubscribe instructions can be found at www.t13.org.
