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SD read/write speed
If anyone is interested I ran several tests on the sd card slot.  It's not a slouch by any means.  I consistently get speeds of 40 mbps write and 60 mbps read.  I can run this test because I'm running off a hard drive and only using the sd slot for initial boot.  I'm using a Silicon Power 16GB MicroSDHC UHS-1.  I've attached a copy of one test using Gnome-disk-utility.  Pretty darned fast and actually faster the the performance from the usb 2.0 ports.

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Armbian. Lightweight Debian Stretch or Ubuntu Bionic for Tinker Board.
(12-23-2017, 07:06 AM)igorpec Wrote:

Nice reading thanks.  What I have noticed is that although the SD card performs faster in a simple test the USB 2.0 hard drive seems to preform better in real world usage.  That helps explains why it's so :-)

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