The CABMS2FN10 is an internal Mini Serial Attached SCSI (SAS) x4 (SFF-8087) to (4) x1 Serial ATA (controller based) fan-out cable with SFF-8448 sideband signals. It is used for connecting a SATA/SAS controller (SFF-8087) to SATA disks, or a SATA/SAS backplane.
