2M 40G QSFP+ SFF-8436 to Mini SAS HD SFF-8644 External SAS Cable Part #: TKAQSFPTSASHD2M
- Brand: Generic
- Part #: TKAQSFPTSASHD2M
- Specs:-
- ::Type: Server and storage connect cables
- ::Description: QSFP SFF-8436 to SFF-8644 Cable
- ::Bandwidth: Supports up to 40 Gbps total throughput.
- ::Architecture: Usually organized as 4 lanes of 10 Gbps each.
- ::Passive Copper: Being a DAC cable, it is "passive," meaning it does not contain optics or lasers. This makes it highly energy-efficient and cost-effective for short distances within a rack.
- ::Impedance: 100 Ohms (Standard for high-speed differential signals).
- Compatibility:-
- ::NetApp/Storage Shelves
- ::HBA to Switch
- ::JBOD Expansions
- Condition: New
- Warranty: 1 (one) year Tekmart Africa warranty
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INT241225HRTCN2025
**Eligible for immediate collection / shipping upon order confirmation*
These cables refer to Hybrid Direct Attach Copper (DAC) cables, specifically designed to bridge the gap between networking hardware and external storage systems.
Because they use two different connector standards (QSFP+ for networking and Mini SAS HD for storage), they are often used in specialized data center setups, such as connecting a high-speed switch to a disk shelf.
Part Number Breakdown
| Segment |
Meaning |
Technical Detail |
| 40G QSFP+ |
Connector A |
Quad Small Form-factor Pluggable. Commonly used for 40Gb Ethernet or InfiniBand. |
| SFF-8436 |
Form Factor A |
The industry standard specification for the QSFP+ connector design. |
| Mini SAS HD |
Connector B |
High Density Mini Serial Attached SCSI. The standard for modern high-speed storage. |
| SFF-8644 |
Form Factor B |
The standard specification for External Mini SAS HD connectors (12Gbps per lane). |
| 2M |
Length |
2 meters is a common length for "Top-of-Rack" connections. |
Application use cases:-
- ::Connecting NetApp/Storage Shelves: Often used to connect newer storage arrays (like NetApp DS series) to older controllers or specialized networking cards.
- ::HBA to Switch: Connecting a Server’s Host Bus Adapter (HBA) with a Mini SAS HD port directly to a 40G QSFP+ port on a network switch.
- ::JBOD Expansion: Linking external "Just a Bunch Of Disks" (JBOD) enclosures to a head node server.
Important Compatibility Warning:-
While the connectors fit physically, directionality and protocol matter immensely for these cables.
- Protocol Mismatch: Most QSFP+ ports expect Ethernet or InfiniBand signals, while SFF-8644 ports expect SAS (Storage) signals.
-
Caveat:
This cable will only work if the device on the QSFP+ end (like a switch or specialized HBA) is specifically configured to output or receive the SAS protocol.
Plugging a standard SAS disk shelf into a generic Ethernet-only switch using this cable will generally not work.
For a shorter length of this same cable, 1M precisely, you can buy these here.
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