Extended Partition Support in FatFS

[nishal]

Hi,

I am trying to use FatFS generated from STM CubeMx as middlewares. I am using STM32L4 with external memory eMMC. I see that I can create upto 10 (0-9) Logical Partitions, but when I look into f_fdisk API, seems like it takes only 4. I understand that we can only 4 primary partition, But I believe that one of the primary partition can be used for extended partition.

I am not able to understand if extended partitions is supported for not. I understanding is that it is not supported in the current FatFS middleware, but did not find more information.

Ref: http://irtos.sourceforge.net/FAT32_ChaN/doc/en/filename.html#vol

http://irtos.sourceforge.net/FAT32_ChaN/doc/en/fdisk.html

So My questions is if we want more logical partitions, does that mean that we have to add another physical memory device to achieve this?

Please confirm on the understanding.

Thanks in advance