The Adaptec ACK-E-HDmSAS-HDmSAS-2M is an external Mini Serial Attached SCSI HD x4 (SFF-8644) to Mini Serial Attached SCSI HD (SFF-8644) cable. It measures 2 meters.
The Adaptec ACK-I-rA-HDmSAS-4rASATA-SB-.8M is an internal "right angle" Mini Serial Attached SCSI HD x4 (SFF-8643) to "right angle" (4) x1 Serial ATA fan-out cable with sideband signals (SFF-8448). It measures 0.8 meters and is used for connecting a SAS/SATA adapter to SATA disks, or a SAS/SATA backplane.
The Adaptec ACK-I-rA-HDmSAS-4SATA-SB-.8M is an internal "right angle" Mini Serial Attached SCSI HD x4 (SFF-8643) to (4) x1 Serial ATA (adapter based) fan-out cable with sideband signals (SFF-8448). It measures 0.8 meters and is used for connecting a SAS/SATA adapter to SATA disks, or a SAS/SATA backplane.
The Adaptec ACK-E-HDmSAS-mSAS-2M is an external Mini Serial Attached SCSI HD x4 (SFF-8644) to Mini Serial Attached SCSI x4 (SFF-8088) cable. It measures 2 meters.
The Adaptec ACK-I-HDmSAS-4SATA-SB-.8M is an internal Mini Serial Attached SCSI HD x4 (SFF-8643) to (4) x1 Serial ATA (adapter based) fan-out cable with sideband signals (SFF-8448). It measures 0.8 meters and is used for connecting a SAS/SATA adapter to SATA disks, or a SAS/SATA backplane.