release 10.1 beaglebone black rev C, the internal emmc does not appear to be enumerated on boot -- expected behavior is to see the device at /dev/mmcsd1. does not appear probed in the dmesg output at boot.
This is a duplicate of this error message
(In reply to Ivan Klymenko from comment #1)
> This is a duplicate of this error message
No, this is a specific problem of beaglebone.
The eMMC issue was fixed on -head (after r275950).