USB 3 external drive performance?

Sanlitun

macrumors 6502
Original poster
Sep 19, 2014
472
404
127.0.0.1
Anyone else experiencing very slow performance from external USB 3 storage? I know the release notes specify issues with USB 2 but say nothing about this.

I have a SSD in an external USB 3 enclosure that I get 400 MB/s on my Macbook Pro but now on my nMP
I am lucky to get 40 MB/s.

Anyone else seeing this?
 

leventozler

macrumors 6502
Feb 18, 2009
312
113
I get ~140MB write 360MB read (couple years old SSD)

Checked another external SSD drive connected to a Trust USB 3.0 Hub and got ~36MB read/write. Check System Information > USB and make sure it's listed as USB 3.0 device.
 

SG-

macrumors regular
Jun 8, 2015
107
65
the release notes mention there's USB issues for last two builds.
 

MikhailT

macrumors 601
Nov 12, 2007
4,470
1,077
No problems here with USB3 dual-bay chassis (Oyen Digital RAID v2), 350MB+ on both read/write.
 
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