I suspect they are using an OS-level filter driver for multiplexing the second SAS channel with the primary channel. Until the driver is loaded only one SAS channel is used, so it is neither active/passive or active/active. It's essentially recognized as two separate devices, although the second device is an interface, not a logical drive. The reason I believe this to be the case is because their photos indicate very precisely port 1 and port 2, essentially master and slave.
@Anton Shilov: is the Write Latency with 100 ms (milliseconds) correct? Microseconds would appear more appropriate to me. Same for the sister drive SN200.
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RaichuPls - Wednesday, December 7, 2016 - link
Does dual-port SAS 12 Gbps mean a total of 24 Gbps throughput or just 12 Gbps?Samus - Thursday, December 8, 2016 - link
24Gbps, minus overhead.extide - Thursday, December 8, 2016 - link
No, I am pretty sure it is active/passive (not active/active) which is curious how they get 1,800MB/sec through a 12Gbit/sec link...ZeDestructor - Thursday, December 8, 2016 - link
It's active/active - HGST were bragging about having achieved it a few months ago.Samus - Thursday, December 8, 2016 - link
I suspect they are using an OS-level filter driver for multiplexing the second SAS channel with the primary channel. Until the driver is loaded only one SAS channel is used, so it is neither active/passive or active/active. It's essentially recognized as two separate devices, although the second device is an interface, not a logical drive. The reason I believe this to be the case is because their photos indicate very precisely port 1 and port 2, essentially master and slave.awehring - Thursday, December 8, 2016 - link
@Anton Shilov: is the Write Latency with 100 ms (milliseconds) correct? Microseconds would appear more appropriate to me.Same for the sister drive SN200.