No. The Apple HDI-30 SCSI Disk Adapter Cable cannot be used as you describe. This cable is used to connect a PowerBook 100 to another Macintosh, which enables the PowerBook 100 to be used as an external hard drive on the other Macintosh system.
The Apple HDI-30 SCSI System Cable is used to connect any Macintosh PowerBook to an external SCSI device that conforms to SCSI standards. This cable is 19 inches long and has a standard 50-pin male SCSI connector. We don't have any specific compatibility information about the Dayna product at this time.
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