Internal mini serial attached scsi hd x4 sff 8643 to mini serial attached scsi x4 sff 8087 cabler key featuresr r type adaptec 6gbs sas hd cablesr compatibility series 77q adaptersr dimension 1 meterr r the adaptec ack i hdmsas msas 1m is an internal mini serial attached scsi hd x4 sff 8643 to mini serial attached scsi x4 sff 8087 cable it measures 1 meter and is used for connecting a sassata adapter to a sassata backplane