Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

I used an Ancot Ultra2080/Lite SCSI-bus Analyzer. This is a device that connects to a SCSI bus and has a serial port. Over the serial port, you can monitor the signals on the SCSI bus, and use it as a SCSI protocol analyzer. There?s also the possibility to construct and send a SCSI command. Rather than connect a serial terminal to the serial port, I connected a PC, then wrote a C program to control the Ancot. I had the Ancot send commands to the disk to read a sector at a time, and recorded the data sent in response to a file to create a disk image. Slow as hell (each byte on the disk requires sending two hex characters and a space over a slow serial line), but it works. I had to make several passes over the disk, because occasionally the data received from the disk turned out to be data from a different sector than the one I was trying to read. By reading the disk multiple times, I could get rid of these mis-read sectors.