Adaptec 12gbs sas hd cables for series 88q adaptersr the adaptec ack i hdmsas hdmsas 1m is an internal mini serial attached scsi hd x4 sff 8643 to mini serial attached scsi hd x4 sff 8643 cable it measures 1 meter and is used for connecting a sassata adapter to a sassata backplane with mini sas hd connectors