topic Re: SATA Speed is quite low at IMX6D platform in i.MX Processors

SATA Speed is quite low at IMX6D platform

houjunjie — Wed, 19 Sep 2018 10:04:59 GMT

Now we are using IMX6D platform and the kernal version of it is 4.1.15 to test SATA speed. The result of both Read and Write is only 67MB/s. And we tested the SSD in different ARM platform, the speed can achieve 500MB/s. This speed 67MB/s is even not meet SATA1.0.

Our project is quite urgent, please help to give us some advice. Thanks.

Junjie

Re: SATA Speed is quite low at IMX6D platform

igorpadykov — Wed, 19 Sep 2018 23:49:28 GMT

Hi Junjie

reason may be signal integrity issues (noise), one can try to improve

signal shape using IOMUXC_GPR13 register described in sect.36.4.14 GPR (IOMUXC_GPR13)

i.MX6DQ Reference Manual

http://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf

Also one can recheck sata signal layout, using layout requirements provided in

i.MX6 System Development User’s Guide

https://www.nxp.com/docs/en/user-guide/IMX6DQ6SDLHDG.pdf

Best regards
igor
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Re: SATA Speed is quite low at IMX6D platform

houjunjie — Thu, 20 Sep 2018 02:07:16 GMT

Hi Igor:

Actually our layout is totally same as your reference design. And also we tested the SATA speed in your EVB with kernal 4.1.15 and we got same issue. The EVB is as below. Please help to check it.

Re: SATA Speed is quite low at IMX6D platform

igorpadykov — Fri, 21 Sep 2018 01:05:35 GMT

Hi Junjie

please check

iMX6Q SATA performance (speed limit)

Best regards
igor