Probles about filedisk!

hello everyone,
i have some questions about the filedisk.i have implemented a driver of
filedisk,and can create virtual disk and encrypt/dencrpyt the data that
read and write,but i still have some questions following:
1.why i add the virtual disk J turned to a floppy disk drive B after
reboot,but this only happenes sometimes?
2.i want to enable different users to create their own disk,and their
encrypt key are the same,how can i to disable one user from looking others
disk?
3.i can umount the disk not only the disk create by me also the ture
disk volume,how to resolve this problem?
4.can i change the icon of the virtual disk which created by me?

sorry i have so many question to ask you.
regards
ding hao


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