Hi.

I'm having problems with my 2 MS partitions in my external USB 2 TB WD
Green HDD. I wanted to have 2 encrypted partitions (W7 EE SP1's
BitLocker NTFS and HFS[Time Machine and manual Mac files]) and an
unencrypted FAT (tried both FAT32 and exFAT). I had no problems
(mak/creat)ing them.

The problem is that Mac OS X v10.10.5 (Yosemite) thinks I have 2 FAT
drives (only 1 should exist while other is NTFS (assuming cannot be read
due to its BitLocker encryption which is fine to me)). If I connect it
to a W7 laptop/notebook, then only FAT can be seen.

I tried reformatting the encrypted BitLocker NTFS to unencrypted FAT in
Mac OS X's Disk Utility which can be seen in Mac, but W7 does't see it.
I tried letting W7's Disk Management make this unallocated partition to
a new simple volume (NTFS or exFAT -- tried both), but it said "The
operation you selected will convert the selected basic disk(s) to
dynamic disk(s). If you convert the disk(s) to dynamic, you will not be
able to stat installed operating systems from any volume on the disk(s)
(except the current boot volume). Are you sure you want to continue?" I
tried Yes and its Virtual Disk Manager said "The operation is not
supported by the object."

I tried deleting all partitions and told Mac OS X's Disk Utility to
recreate the 3 partitions (unencrypted HFS+ & 2 MS FAT partitions) from
scratch. Everything was fine when I checked between machines. I told W7
to format a FAT partition into NTFS with BitLocker encryption. After it
was done, I rechecked with Mac OS X. Partitions were fine (yes, I know
Mac can't read BitLocker encryptions so that partition stays hidden). I
told Mac OS X to do a very long encrypted Time Machine backup and
manually copy some files into this encrypted HFS+ partition for hours.
After that, I went back to W7 and it can't see my BitLocker partition
(unallocated)!

http://i.imgur.com/tJ5wWz6.gif and http://i.imgur.com/KBwAEct.gif and
for my 2 screen (shot/capture)s from both machine with the same external
USB HDD connected.

What's going on? Does having 2 different encrypted partitions not work
with each other? Or am I doing something wrong?

Thank you in advance.
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