For the low-profile ones that fit in a 6100 and mount the AV or HPV card at right angles, sure. In a 7100 or 8100, you'll also require the PDS passthrough ribbon cable, and sacrifice a Nubus slot to provide mounting space for the AV/HPV.

Check kan.org for further information.

ETA: Did you notice his two external IDE/SCSI converter multi-drive boxes?