lsblk devices

[User 6582]

I can recognize mmcblk1 / ...p1/p2, but I wonder, what are:
mmcblk1boot0
mmcblk1boot1
mmcblk1rpmb
?

Given the 16M size, I assume the last one is the SPI flash? What about the others? (both showing 4M size)
fdisk -l doesn't give me any interesting information.
Are these supposed to be interact-able in any way? 
Or am I just dumb and these are actually still the eMMC?

Partitions on the eMMC?
I know when I used the "Disks" program in Debian (that I added to OEM OS on the PBP), I saw the partitioning on what "Disks" refered to as an SD, which the eMMC....
That help? :-)

Well I thought so too, but if those are partitions on the eMMC, shouldn't they visually show as a part of the "mmcblk1" device? (pic attached)
fdisk -l /dev/mmcblk1 also doesn't list them as partitions belonging to it.

---

Alright, mystery solved!
Basically those are some special-cookie "partitions", intended by the eMMC spec for boot firmwares (boot0, boot1), and secure data (rpmb).
Then there's the normal "USER" partition(~block-device), which is used for normal partitioning (= mmcblk0/1[p1/2/3..]).

References:
https://www.kernel.org/doc/Documentation...-parts.txt
http://trac.gateworks.com/wiki/MMC
https://www.slideshare.net/linaroorg/intro-to-emmc

Excellent, Thanks!! :-)