Using home dir on another volume, Time Machine let me not administrate it.

My problem is, that I am not able to administrate my home dir under Time Mashine's dialog.
I have moved my home dir to another 2nd softRAIDed volume. Works fine since 3 years.
So the 1st is, when I should select the backup volume, I only see my SoftRAID disk but not my system disk. So I selected that one.
Now I want to reduce the default backup set by pressing the + and there all my folders are grayed out ad with that not selectable, i.e. I am not able to reduce backup set for a couple of folders.
However I could select some folders under my 'empty' home dir on the system volume, which I do not use but it is still there from the scratch installation.
I think Time Machine does not consider those minor uses yet.
Has anyone an idea?
Thanks in advance!

You may be right...however you could help me to encircle my problem.
A friend of mine also backups up with TM to the same and only disk he has. There it works. Therefore I claim the same solution for me
There is also not the question if it makes sence to backup to the same disk, there you are strictly right and I commit that.
However I want to use Time Machine not as a usual backup solution and out of that reason it must backup to the same disk.
So it would be great if you could check if you can select your system drive (250GB) in principle. Does it appear? At me not.
Then if you are firm with TM you could change your backup drive to your data drive (750BG) and try to add an unbackuped folder...this is what not works at my set. And this is what I think is wrong with TM. Do you see what I mean?
Thx!
Message was edited by: MacHolly
Message was edited by: MacHolly

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Would an external 2tb My Passport Drive by Western Digital work for the backup?
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Suggested Backup Software
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2. Get Backup
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Using home dir on another volume, Time Machine let me not administrate it.

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