Samsung Evo 850 2TB USB 3.0 Speed Normal?

[orangefridge]

Hi,
After eventually talking myself out of putting my Samsung Evo 850 inside my laste 2015 i7 iMac, I purchased a USB 3.0 external enclosure (inatek) as many people recommended it would be optimum speed.

I was under the impression I would be getting much faster Read / Write speeds than I'm getting.
Am I missing something? Just formatted to Mac OS Extended (Journaled)

Do I need to reformat it different? Firmware updates? (Can't find for this model)
If this is my maximum speed I may as well stick to my Lacie.

Thanks

 

[satinsilverem2]

Thats pretty low im using a Satechi enclosure with that same drive and am getting 500/480 read/ writes so I would say that your enclosure is limiting you. what is the enclosure?

 

[kohlson]

Low - agreed. Is the enclosure UASP? See https://forums.macrumors.com/threads/inateck-uasp-usb3-enclosure-review.1712510/

 

[Fishrrman]

It's probably the enclosure.
As kohlson mentioned above you need an enclosure that is -specifically stated- to support UASP.

You should be seeing reads around 430mbps.
You should be seeing writes anywhere from 300-350mbps.

You could also use something like this:
https://www.amazon.com/Sabrent-2-5-...478&sr=1-2-spell&keywords=sabremt+usb3+to+ssd

 

[nikolajlr]

Dug out some old tests I did back in 2014 - beware that the Disk Speed Test dials seem to have had another scale than the current version, so only look at the numbers.

This is what I got on my iMac 27 2011 using a CalDigit Thunderbolt Station with USB3 with a Samsung 840 EVO 250 GB in a StarTech S2510BPU33 USB 3.0 chassis with UASP:

With a Delock chassis without UASP, same SSD:



And Thunderbolt 1: Samsung EVO 840 500 GB (note: it is by design faster than the 250 GB version above) in external Buffalo MiniStation Thunderbolt 1 chassis (came with HD I swapped out) and with TRIM enabled:

So it seems like you should be able to get better performance than you currently see.

 

[Fishrrman]

I believe some speed is lost (via USB3) when "going through" an external dock (like the CalDigit, etc.)

Connect the USB3 SSD -directly to- one of the Mac's USB3 ports, and test it again.

I have a 2012 Mac Mini which I boot and run using SSD's mounted in external USB3 docking stations. I get reads of 431mbps from both drives.

You should see 430mbps at least...