Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
2nd 5D on 2014 Mac Pro - Best connection?
11-30-2014, 01:47 PM
Post: #1
2nd 5D on 2014 Mac Pro - Best connection?
I just bought my second Drobo 5D. It is attached to a 2014 (black can) Mac Pro. At present I've daisy chained it to the first Drobo 5D and that works fine, but I wonder if I would get better performance when using both Drobos at the same time if I connected the second 5D directly to a different port on the Mac. I've got two open ports at present.

Would using a second thunderbolt port give better bandwidth for data transfers? Under what circumstances would the offer a noticeable improvement over daisy chaining two or more 5D's?
Find all posts by this user
Quote this message in a reply
11-30-2014, 10:08 PM
Post: #2
RE: 2nd 5D on 2014 Mac Pro - Best connection?
The new MacPro has TB2 ports, the 5D only has TB ports. It would take multiple (my guess is 4+) 5D's to saturate one of the TB2 ports.

i7 Mac Mini Server, 10.10
Drobo (Gen2), USB, 4x WD 4TB RED

Drobo (Gen3), USB3, 4X WD 4TB RED

Drobo 5D, TB, 5x WD 4TB RED, 120GB Intel 525 mSATA SSD
Find all posts by this user
Quote this message in a reply
12-01-2014, 07:58 AM
Post: #3
RE: 2nd 5D on 2014 Mac Pro - Best connection?
(11-30-2014 10:08 PM)mgriffin34 Wrote:  The new MacPro has TB2 ports, the 5D only has TB ports. It would take multiple (my guess is 4+) 5D's to saturate one of the TB2 ports.

Thanks. However, when transferring data, the TB port of the 5D is effectively a bottleneck. I was wondering if when copying data from one 5D to the other daisy chaining them might limit the data transfer speed. I guess I could do some experimenting, but I was hoping someone else already had.
Find all posts by this user
Quote this message in a reply
12-01-2014, 08:58 AM
Post: #4
RE: 2nd 5D on 2014 Mac Pro - Best connection?
Some benchmarks with something like Blackmagic or AJA would be great.

I think you are going to find that the Drobo's can't saturate the single TB channel. TB provides 10Gbit/sec (1.25GB/sec). I've never had a 5D exceed 200MB/sec, so it would appear there is plenty of room on the TB channel.

It's a good point about the 5D-to-5D potentially being a bottleneck. I have had an on-going issue with the TB chipset in my 5D. I was using it as a monitor pass-thru with my Mac Mini, but kept getting artifacts on the screen.

i7 Mac Mini Server, 10.10
Drobo (Gen2), USB, 4x WD 4TB RED

Drobo (Gen3), USB3, 4X WD 4TB RED

Drobo 5D, TB, 5x WD 4TB RED, 120GB Intel 525 mSATA SSD
Find all posts by this user
Quote this message in a reply
12-01-2014, 02:45 PM
Post: #5
RE: 2nd 5D on 2014 Mac Pro - Best connection?
(12-01-2014 08:58 AM)mgriffin34 Wrote:  TB provides 10Gbit/sec (1.25GB/sec). I've never had a 5D exceed 200MB/sec, so it would appear there is plenty of room on the TB channel.

THANK YOU. That was just the information I was looking for. Based on that, daisy chaining two or more Drobos to a single TB port shouldn't be an issue. Thanks again.
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump: