Changes between Version 1 and Version 2 of Ticket #41, comment 10


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Timestamp:
Apr 24, 2017, 9:57:24 AM (8 years ago)
Author:
erdmann

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  • Ticket #41, comment 10

    v1 v2  
    12124) 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 :-)
    1313
     145) 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.
     15
    1416Please note that exFAT support in USBMSD.ADD is the bare minimum to allow peaceful coexistence with DFSEE to show a large floppy exFAT formatted USB stick as such in DFSEE. It does NOT read/write files or directories and it knows nothing of the exFAT filesystem layout.