Since I have not NUC6CAYS, can you send me the following info in NUC6CAYS:

  1. Power on, press F10 to enter the BIOS boot menu.

  2. Select boot to UEFI shell.

       If there is no UEFI shell, then you need enter BIOS setup program to disable the secure boot and enable the boot of UEFI shell.

  3. After enter the UEFI shell, there is a list of the supported block devices.

  4. You can use Page Up and Page Down key to check the whole list.

  5. Take a picture of the BIOS version and block device list and email it to me.


  BR/Tan Ming.


From: Tan, Ming
Sent: Friday, October 19, 2018 9:04 AM
To: 'Marathe, Yogesh' <>; Bernard Carter <>; N, Shyjumon <>;
Subject: RE: NUC6CAYS/eMMC



  Currently kernelflinger in Celadon support the following storage type:

    eMMC, UFS, SD card, SATA, NVMe, and also support USB if enabled (disabled by default).

  For eMMC, we already verify that kernelflinger in Celadon support eMMC in Joule, KBL RVP, Leaf Hill.

  Kernelflinger check the eMMC device use two methods:


    2. Device path sub type is MSG_EMMC_DP.

  If the BIOS does not support anyone of the above methods, then kernelflinger can’t support eMMC in this device.


  If you verity that the kernelflinger can’t be running in eMMC in the NUC6CAYS and you own N3350 APL device, can you check the BIOS whether support the above method? Or we need to buy a NUC6CAYS to verify it, or we modify the kernelflinger to add more log, and mail it to you, and let you help us to debug it.


  BR/Tan Ming.


From: Celadon [] On Behalf Of Marathe, Yogesh
Sent: Thursday, October 11, 2018 11:27 PM
To: Bernard Carter <>; N, Shyjumon <>;
Subject: Re: [ Celadon] NUC6CAYS/eMMC


Hi Bernard,


Until now eMMC boot & storage wasn’t scoped for APL Celadon, you can make a formal request if its needed for your product. If you are not a registered user, please register yourself on here. With same credentials of, you can raise new feature request for Celadon here (Choose project ‘CEL’ & issue type ‘Feature’, Choose platform (APL), mention the description & hit Create).  


We’ll try validating this on APL-NUC and get back to you if there is any progress.





From: Celadon [] On Behalf Of N, Shyjumon
Sent: Thursday, October 11, 2018 2:04 PM
Subject: Re: [ Celadon] NUC6CAYS/eMMC



eMMC is not supported in celadon as of now.

Means that there is no support in kernel flinger, however the kernel drivers are in place, though it is not validated for eMMC boot or external storage.


Thank you and Regards,

Shyjumon N.



From: Celadon [] On Behalf Of Bernard Carter
Sent: Wednesday, October 10, 2018 11:54 PM
Subject: [ Celadon] NUC6CAYS/eMMC




I’ve been testing Celadon on two platforms, both with eMMC (NUC6CAYS and a Celeron N3350 APL device).  For the NUC6CAYS I’ve disabled the eMMC and used an SATA SSD.  Our final product plans, however, require use of eMMC storage.  Kernelflinger appears to not support the flavor of eMMC being used by these two devices.  When using a GRUB installer image, I’m able to lay it down, but the unit fails to boot and eventually shuts off.  Is there any guidance around usage of eMMC storage with Celadon?