Hi,

 

Is there any reason why the card is only initialized as high speed SDHC on this board?

 

Quote

[    3.991777] sunxi-mmc 1c0f000.mmc: Got CD GPIO
[    4.021541] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB
[    4.105871] mmc0: host does not support reading read-only switch, assuming write-enable
[    4.119279] mmc0: new high speed SDHC card at address e624
[    4.125858] mmcblk0: mmc0:e624 SC32G 29.7 GiB
[    4.135617]  mmcblk0: p1

 

On my phone, it is initialized as ultra high speed SDR104 SDHC.

 

Quote

[   14.035372,7] mmc_gpio_cd_irqt: mmc cd gpio status: 1
[   14.449389,7] mmc1: new ultra high speed SDR104 SDHC card at address e624
[   14.450205,7] mmcblk1: mmc1:e624 SC32G 29.7 GiB
[   14.451090,7]  mmcblk1: p1
[   14.553053,6] devfreq mmc1: Couldn't update frequency transition information.

 

I'd like to know if there's anything I need to do to maximize the card's performance on this board. Thanks.

After some search using a few different keywords yielded to the answers I was looking for from @tkaiser here.

 

From that discussion, it would appear that the SD card speed was limited for stability reason.

Edited February 13, 20206 yr by TRS-80
spacing, remove ping