A cheap dual-port (multiplath SAS cable?

[EasyRhino]

I recently got a cheap price on a SAS SSD that supports dual-port / multipath, and would need to use it to get the full rated performance.

Does anyone know any really cheap SAS cables that can support a dual port connection? I don't know if it just needs all 29 pins connected or something else special? My HBA is a HP H240 so it still uses SFF 8087 on the card end.

I've seen some other ones linked around the internet, but the cables are like $50. that's not worth it for my limited tinkering budget.

I thought I saw some SFF 8087-8462 cables from china on ebay that seemed to show a picture with all the pins attached, but I'm dubious.

 

[Sean Ho]

Supermicro BPN-SAS2-826EL2 2U 12-Bay SAS/SATA 6Gb/s Dual Expander Backplane | eBay

Asset recovery and recycling services. Printer Parts.

www.ebay.com

 

[mattventura]

What is the other end connected to? Straight to the drive? The most I've seen is SFF-8482 adapters that break it out the dual ports into two separate 7-pin/SATA connectors. It's fairly uncommon to run dual-port drives without a backplane.

 

[Sean Ho]

Ah, my apologies; I was thinking of 3.5" spinners. For SAS3 SSDs:

Supermicro Bpn-sas3-216el2 2u 24 Bay Dual Expander Backplane for sale online | eBay

Find many great new & used options and get the best deals for Supermicro Bpn-sas3-216el2 2u 24 Bay Dual Expander Backplane at the best online prices at eBay! Free shipping for many products!

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Each expander connects to one port of all the drives. You'd typically connect each expander to a separate HBA. Then use multipath in the OS.

 

[EasyRhino]

The backplanes are interesting but don't fit my super cheap requirement

 

[Sean Ho]

How many SSDs? Will the single SAS3 lane to the SSD be the bottleneck?

 

[EasyRhino]

How many SSDs? Will the single SAS3 lane to the SSD be the bottleneck?

It's just one SSD, but it's an old HGST enterprise model that's quoted at around 1000MB/s for single port and 2000MB/s for dual port operation.