Please use this report to link all of your bugs about USETUP partition support problems !!
Reactos installer destroyed partition table
USetup damages partition table
Setup doesn't ask where bootloader must be installed when destination partition is not active
Setup fails with typical Linux Partition Table
scsiport: ReactOS hangs listing partitions in 1st stage setup
ReactOS does not boot from partitions behind an extended partition
Patch correcting bootcd setup silent fail while can't format given partition
USETUP: Formatting a existing partition does not work anymore.
Install without formating is broken since r68112
ReactOS does not recognize Windows's FAT32 partition as valid filesystem
ReactOS installer formats an another FAT-partition
USETUP detects active ext2 partition as raw and attempts to format
Setup > Partitions configuration > Scroll in partitions list doesn't work
Setup: Warning about incompatible partition table
ReactOS setup generates corrupted FAT filesystem.
Partition types in USetup
USETUP only supports one primary partition, and only MBR
USETUP only supports one primary partition per disk in MBR setups
Usetup: Little improvements
Make optional disk checking in usetup
Can't install ROS when there is NTFS partition on RealHW
Formatting with ReactOS setup doesn't register if there are multiple partitions just created
The ReactOS installer formats partition to "unknown" filesystem.