How to Write an Image to the eMMC Module Tutorial
#35
(09-03-2017, 10:41 AM)rhille Wrote: BUT since then I do have a message

blk_update_request: I/O error, dev mmcblk0rpmb, sector 0

in syslog which I'm a little bit scared of.
mmcblk0rpmb is a linux designation for "Replay Protected Memory Block", a special eMMC  partition (4MB here) for "dat security". Writes and reads there are signed, encrypted, all that thing. I think linux should not touch it without the specific reason. And I am not sure the support for this works (and works as needed) in the current linux build. It's a pretty capricious feature. I guess everything OK with it. linux just touches what it shouldn't. and gets rejected. Smile

PS. Btw, see, the eMMC module has two boot areas, 4MB each
Quote:mmcblk0boot0 179:32 0 4M 1 disk
mmcblk0boot1 179:64 0 4M 1 disk
for firmware storage and booting. this is exactly what i was talking about when said about two SPI NOR chips for redundancy and robustness. It's safer. eMMC standard incorporates this and we have a duplicated (backed up) special firmware booting device inside an eMMC card. without touching a User Area, so that the user could use all of the bytes there for their needs. But vendors aren't bothered with such things like efficient and proper technology application. Instead they have produced 7 (!) partitions in the user area! For nothing. well.
ANT - my hobby OS for x86 and ARM.


Messages In This Thread
RE: How to Write an Image to the eMMC Module Tutorial - by z4v4l - 09-03-2017, 02:10 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Rock64 u-boot for eMMC Build Error mexicanflyer 0 1,346 09-18-2022, 02:29 PM
Last Post: mexicanflyer
Thumbs Up USB3.0 to eMMC Adapter... MattDralle 2 3,538 10-28-2021, 12:20 PM
Last Post: tllim
  Pine Rock64 eMMC lifespan moonspell79 3 4,250 08-19-2021, 06:46 PM
Last Post: bcnaz
  Download IDB fail when trying to flash Android image cherkasoff 0 5,107 04-05-2020, 07:41 AM
Last Post: cherkasoff
  Receiving errors about eMMC (?) acasta 11 17,724 09-24-2019, 10:26 PM
Last Post: ridgarou
  USB -> eMMC is now available. Luke 15 32,288 07-27-2019, 04:27 PM
Last Post: tllim
  Rock 64 network error as soon as I try to write or read. georgegohl888 1 3,300 03-12-2019, 09:35 AM
Last Post: georgegohl888
  Rock64 scipy, numpy, scikit-image, matplotlib issue with pip3 ictele 0 2,193 02-05-2019, 05:41 PM
Last Post: ictele
  flash image to sd/emmc through ethernet LMM 0 2,477 02-04-2019, 07:36 AM
Last Post: LMM
  HW image transitions in Python gaggleoxfoggy 7 8,829 11-24-2018, 10:41 AM
Last Post: gaggleoxfoggy

Forum Jump:


Users browsing this thread: 1 Guest(s)