GPT or MBR for sdcard in Turris MOX

I’m provisioning a sdcard for Turris MOX.

Does the bootloader in Turris Mox support booting from GPT-partitioned sdcards as well as MBR-partitioned ones?

Not 100% sure but as the documentation regarding bootong from external disks on omnia stating that gpt is recomended it’s worth a try at least

I’d like to have authoritative information for internal sdcard, which is handled by u-boot differently than external drives.

says nothing about MBR vs GPT

If the SD cards capacity & speed suffices your requirements: Yes, well!

Due to capacity and speed requirements, I decided to insert a Kingston UV500 SSD. And partitioned it using GPT., as the original one.

Just for the protocol: The “authoritative” information is denoted publicly within the open source code of openWrt and Turris OS .

fdisk -l 
...
Disk /dev/sda: 447.13 GiB, 480103981056 bytes, 937703088 sectors
Disk model: KINGSTON SUV500M
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: AAAAAAAA-BBBB-1234-CCCC-DDDDDDDDDDDD
...