CorePure64 problem while booting from MMC

[bonbob]

Hi again.
A new problem has appeared as i migrated from TCL 32bit to CorePure64.
Earlier i boot TinyCore 32bit from MMC through built-in cardreader. It's works perfect for a years (since TinyCore 6.x has appeared)
But CorePure64 can not boot from this cardreader. I tried other SD-cards, microSD and MMC.  Different volumes and manufacturers. Problem is the same.

Hovever CorePure64 boot and works good from simple USB-stick.

I made screenshot of booting process:


Seems it some problem with RAM, but loaded from USB-stick Linux has no errors. And works wihout problem 24/7

[Juanito]

Are the md5 checksums correct for corepure64.gz (rootfs64.gz, modules64.gz) and vmlinuz64?

[bonbob]

Hmm... something really wrong with my built-in cardreader.

I install CorePure64 for a couple times, and each try has finished with incorrect md5sum.

Furthermore last mounting of Memory Card was unsuccessfull.

Code: [Select]

mounting /dev/sdb1 on /mnt/sdb1 failed: No medium found

Strange. But TinyCore32 still have no problems with this cardreader.

I have checked files corepure64.gz and vmlinuz64 through external USB-cardreader. md5sum of both is OK. Files good, but built-in cardreader read it with errors.
Cardreader based on Generic storage device 9451

[bonbob]

Problem is solved. 

[Juanito]

How? Why?

[bonbob]

I have checked all my MMC cards, and with only 3 of them TCL boot correctly.  I dont know what is the explanation of it, but "noname" memory cards, and cards from old mobile phones with word "NOKIA" on it surface can not be read correctly by build-in cardreader. Only by external USB device. It's some kind of hadrdware compatibility. So CorePure64 boot perfect from MMC of "Kingston" manufacturer.