Supermicro CBL-SAST-1259LP-85

In a dense Supermicro server chassis, connecting a high-performance RAID controller to four SATA drives demands a reliable, low-profile cable that preserves airflow and signal integrity. The Supermicro CBL-SAST-1259LP-85 answers that need with a Mini SAS HD (SFF-8643) to 4x SATA (7-pin) internal cable, complete with sideband support for backplane management. At 85 cm, it reaches across most rackmount cases without excess slack, while the black, shielded copper construction ensures clean 12Gbps SAS or 6Gbps SATA transfers.

Key specifications

• Connector A: Mini SAS HD (SFF-8643), straight orientation
• Connector B: 4x SATA 7-pin with 4-pin sideband connector
• Cable length: 85 cm (0.85 m)
• Data transfer rate: up to 12 Gbps (SAS 3.0) / 6 Gbps (SATA III)
• Lanes: 4 independent channels
• Shielding: full foil and braid for EMI protection
• Conductor material: high-purity copper
• Colour: black
• RoHS compliant
• Operating temperature: 0°C to 70°C

Why choose it

This cable is engineered for Supermicro servers, HBAs, RAID controllers, and backplanes, guaranteeing pin-out compatibility and stable operation under sustained I/O loads. The low-profile SFF-8643 connector minimizes footprint, improving airflow in cramped chassis. Sideband signals allow drive activity and fault monitoring when used with compatible backplanes. Robust shielding prevents crosstalk between lanes, ensuring error-free data at full SAS 3.0 speeds.

Ideal use cases

• Connecting a 12Gbps SAS HBA or RAID card to four SATA drives in a Supermicro storage server
• Linking a backplane with Mini SAS HD ports to individual SATA drives in a JBOD enclosure
• Upgrading existing SATA cabling to support higher-speed SAS devices without changing drive bays
• Building or repairing high-density storage arrays where cable management and airflow are critical

Good to know

The cable includes a sideband connector for backplane management features such as drive presence detection and fault LEDs. It supports both SAS and SATA drives, but mixing protocols on the same cable is not recommended. The 85 cm length is measured end-to-end including connectors. For installations requiring longer reach, consider using an extender or a different cable length. Always ensure connectors are fully seated to avoid intermittent errors.