o/~ Talking to myself in public o/~
On Tue, 10 Mar 2020 15:51:33 -0400, in gmane.comp.hardware.beagleboard.user
Dennis Lee Bieber <[email protected]>
wrote:
> Out of insanity, running on a BB-AI (16GB eMMC -- so LOTS of free
>space). And SanDisk Ultra 16GB Class 10 HC I 6521DRDKA052
>
>metric BBAI (SD) eMMC
>bdr-MB 21.92 hdparm did not run (tried to access SD)*
>dd-sec 70.0835 17.8329
>dd-MB 6.0 23.5
>write 2471 10096
>rewrite 3344 11092
>read 6753 22651
>reread 6734 22644
>ranread 5401 14757
>ranwrite 1934 10919
>
>... So on the BBAI, the eMMC appears to be much faster than that SD card
>(note that the Class 10 16GB SanDisk in a BBAI isn't all that much faster
>than the Class 4 8GB SanDisk in a BBB)
>
And for giggles, I booted the "other" SD card and ran the test...
A SanDisk Ultra Plus, 16GB HC I U1 A1 (no "Class" marking)
metric BBAI (SD)
bdr-MB 21.61
dd-sec 38.8745
dd-MB 10.8
write 2840
rewrite 3760
read 7027
reread 6903
ranread 5759
ranwrite 3331
So the Ultra Plus is slightly faster (about 2X for "dd" and "random
write") -- not enough to worry about (especially compared to the eMMC on
that device).
--
Dennis L Bieber
--
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