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SubjectRe: loopback on block device
Please cc me if you have answers to this, I am not on the list. Thanks a 
lot!

Lei Yang wrote:

> Hello,
>
> Here is a question for loopback device. As far as I understand, the
> loopback device is used to mount files as if they were block devices.
>
> Then Why I could do "losetup -e XOR /dev/loop0 /dev/ram0" ? Notice
> that ram0 is not mounted anywhere and does not have a filesystem on
> it. I've tried that command and there seems to be no error. I got
> confused and looked into loop.c, it seems to me that a loopback device
> should be associated with a "backing file", why would it work on a
> block device anyway?
>
> I'd appreciate your comments greatly!
>
> TIA,
> Lei
>


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