Context Navigation

Changes between Version 2 and Version 3 of Ticket #41, comment 10

v2	v3
10	10	3) for large floppy media, USBMSD.ADD will write the partition type field all by itself into the emulated MBR, either the IFS_INDICATOR (0x7, for exFAT) or the FAT32X_PARTITION_INDICATOR (0xC, for FAT32).
11	11
12		4) USBMSD.ADD WILL write a few BPB fields (BigTotalSectors, BytesPerSector, HiddenSectors, NumHeads, SectorsPerTrack) of the emulated VBR even for exFAT. I seem to remember I did that because OS/2 knows nothing about the new MBR layout for exFAT formatted media and will be unhappy if it does not find at least these few fields of the legacy BPB layout. It's all OS/2's fault :-)
	12	4) USBMSD.ADD WILL write a few BPB fields (BigTotalSectors, BytesPerSector, HiddenSectors, NumHeads, SectorsPerTrack) of the emulated VBR even for exFAT. I seem to remember I did that because OS/2 knows nothing about the new VBR layout for exFAT formatted media and will be unhappy if it does not find at least these few fields of the legacy BPB layout. It's all OS/2's fault :-)
13	13
14	14	5) Finally, in order to "revert back" a large floppy emulated media back into a state where it can really be partitioned, it will look at the VBR. If this VBR is all zeros, it will "turn off" the emulation. The idea is to write all zeros to the VBR via DFSee (for example). Once you did that you can then use LVM to do a real partitioning of the media.