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I have an HP Elitebook 8470w connected to an Inateck USB 3.0 to SATA Docking Station with a Crucial 64gb M4 SSD plugged into it.
So why am I seeing un-cached sequential read speeds of only ~30MB/s?
Edit - I discovered I had the drive connected to a USB 2.0 port on the laptop. When connected to the USB 3.0 port I'm now seeing closer to ~170MB/s which is still a long way from the ~410MB/s I was expecting.
Stupid Question(tm): Are you sure it is plugged into an USB3 port and those ports have the USB3 driver loaded? Also are you sure to read with 4KB blocksize aligned? For example the partition must not start at Sector 63, else you have unaligned reads. – Tino – 2014-02-17T10:17:11.290
I had assumed so, but checking the connections with http://www.uwe-sieber.de/usbtreeview_e.html#download it would seem the USB ports on the right of the laptop are only USB 2.0! On the USB 3.0 port I'm getting ~170MB/s.
– Jon Cage – 2014-02-17T11:52:33.497How can I check on partition location and is NTFS a problem performance-wise? – Jon Cage – 2014-02-17T11:55:33.543
Our real-world benchmark (simulating some software we're trying to optimise for read speed) is reading 1051 bytes per read which presumably could slow things down as it's not a multiple of 4k? Even on a file cached by Windows in RAM we only get up to ~220MB/s.. – Jon Cage – 2014-02-17T12:07:59.877