Bug 412959

Summary:	Distinguish between exFAT and FAT32
Product:	[Applications] partitionmanager	Reporter:	Christoph Vogtländer <kde>
Component:	general	Assignee:	Andrius Štikonas <andrius>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version First Reported In:	4.0.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:	https://invent.kde.org/kde/kpmcore/commit/59c9ba2f8d644357e759e6584b4cddad545d4feb	Version Fixed/Implemented In:
Sentry Crash Report:

Description Christoph Vogtländer 2019-10-15 07:54:00 UTC

When creating a FAT32 partition with partition manager, actually an exFAT partition will be created (partition type 0x07 instead of 0x0b).

This is a problem when creating bootable SD-cards for devices using AM335x ARM Cortex-A8 processor (e.g. BeagleBone boards). The processor is not able to load exFAT partitions.

IMHO partitionmanager should distinguish between FAT32 and exFAT (currently, exFAT is not an available file system option in the list). At least the current entry "fat32" should be renamed to "exFAT" as this is actually what is created.


STEPS TO REPRODUCE
1. create a FAT32 partition

OBSERVED RESULT
the partition type is set to 0x07 (exFAT) (can be checked with e.g. fdisk)

EXPECTED RESULT
the partition type should be 0x0b (FAT32)

Comment 1 Andrius Štikonas 2019-10-15 17:53:14 UTC

Hmm, I checked MBR partition codes, I think it should be 0x0c (MBR with LBA addressing)

Comment 2 Andrius Štikonas 2019-10-15 17:56:55 UTC

(In reply to Andrius Štikonas from comment #1)
> Hmm, I checked MBR partition codes, I think it should be 0x0c (MBR with LBA
> addressing)

Here they also use "c": https://elinux.org/Building_for_BeagleBone#Test_your_new_U-Boot

Btw, actual filesystem created is still FAT32, not exfat. It's partition type that was set to 0x07.

Comment 3 Andrius Štikonas 2019-10-15 20:38:15 UTC

Git commit 59c9ba2f8d644357e759e6584b4cddad545d4feb by Andrius Štikonas.
Committed on 15/10/2019 at 20:37.
Pushed by stikonas into branch '4.0'.

Set MBR partition type of FAT32 partitions to 0x0c.

M  +1    -1    src/plugins/sfdisk/sfdiskpartitiontable.cpp

https://invent.kde.org/kde/kpmcore/commit/59c9ba2f8d644357e759e6584b4cddad545d4feb