On Mon, Dec 7, 2015 at 9:57 AM, William Hermans <yyrk...@gmail.com> wrote:

> I should also add, that I tested USB read / write speeds a couple years
> ago. Reads were actually slower than NFS, but write were around 20MB/s.
>
> Anyway, we're talking ancient 3.8.x, so perhaps with the newer 4.1.x
> kernels that's been improved ?
>


I don't have a direct apples to apples comparison.

The default eMMC flashers use rsync to copy a 'ro' microSD image to the eMMC

I did implement a usb based, but that boots off of a microSD, mounts the
usb and flashes the eMMC via bmap-tools, however it's a *.xz compressed
image on the usb drive..  Which slows it down.

With Jessie, the current 4gb images take about 18:30-ish, with this change
we are back to 11:30-ish

https://github.com/RobertCNelson/boot-scripts/commit/ff8719e152f4464ffc695af3f820883cea29d543

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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