Thunderbolt Math

[11201ny]

Math problem..

Variables:
- MacPro 6,1 (thunderbolt 2)
- OWC Express 4M2 (thunderbolt 3)
- Samsung 970 EVO (x4 - fast as hell)
- Max speed of 1400 MBps over TB2
- Possible speed of 2800 MBps over TB3

Question:
Since TB2 tops out at 1400 MBps @ 4 drive: R0, R4, R1+0 = 1400 MBps? Seems like R1+0 is good.
However, if we were to run this off of a TB3 - R0?!

 

[AidenShaw]

Question:
Since TB2 tops out at 1400 MBps @ 4 drive: R0, R4, R1+0 = 1400 MBps? Seems like R1+0 is good.
However, if we were to run this off of a TB3 - R0?!

There is no TB3 on an MP6,1 - so what is your question? Who are R0, R4 and R1?

 

[crjackson2134]

Raid0, Raid4, and Raid1 I presume...

 

[thornslack]

https://barefeats.com/hard233.html

 

[deconstruct60]

Math problem..

Variables:
- MacPro 6,1 (thunderbolt 2)
- OWC Express 4M2 (thunderbolt 3)
....

Question:
Since TB2 tops out at 1400 MBps @ 4 drive: R0, R4, R1+0 = 1400 MBps? Seems like R1+0 is good.
However, if we were to run this off of a TB3 - R0?!

If I recall correctly from I've read elsewhere the 4M2 is aimed pretty narrowly. It is primarily aimed at striping across all four drives to compose more capacity. So the x4 PCI-e feed from the Thunderbolt controller is split into 4 x1 connections. Maximum, additive, raw speed isn't the primary objective.

if try use it for 4 single drives you probably won't be happy. RAID 10 or 4 would be safety as a major priority.

[ This is kind of more like the infrastructure for a dock ( which would split four ways into something like x1 USB , 1x Ethernet , 1x SD-drive , x1 Audio or something like that). A x4 to multiple x4 switch is a different component and target. ]