Right - we've got it now. The dump started at the beginning of the file and ran until the end of the LV-DOS buffer. Then the next disc read was requested, which couldn't be completed because I've ejected the laserdisc. We already know that LV-DOS reads ahead beyond the block of &1800 bytes it transfers to the SCSI host, so this picture tells us that the LV-DOS buffer is &6000 bytes long.

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