> bock# df -ha
> Filesystem    Size      Used     Avail Capacity  Mounted on
> /dev/sd0a     237M     175M       50M    77%    /
> /dev/sd0b     186M     1.0K      176M     0%    /mnt

> bock# du -m /usr/share/man #Just to see how much diskspace it occupied on sd0a
> 18      /usr/share/man 

> bock# cp -r /usr/share/man /mnt/

> The first weird thing is that this simple procedure takes almost 10
> minutes to complete, the second is the diskspace it occupies on
> /dev/sd0b:

> bock# df -ha
> Filesystem    Size      Used     Avail Capacity  Mounted on
> /dev/sd0a     237M     175M       50M    77%    /
> /dev/sd0b     186M      87M       90M    49%    /mnt

> bock# du -m /mnt/man
> 87      /mnt/man

> What!?  How's that possible?

How?  /usr/share/man contains a lot of files hardlinked together.  But
cp -r converts multiple hardlinks to a file into multiple distinct
files with identical contents.

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