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Re: [Xen-users] Clean deleted space in linux diks?

On Thu, 2012-01-19 at 17:41 +0000, Simon Hobson wrote:
> James Pifer wrote:
> >I'm not exactly sure how their reclamation process works. They say I
> >have to zero out the space, then their reclamation should recover it. No
> >snapshots involved. So my question, should this command zero out the
> >space?
> >cat /dev/zero > null-file ; rm null-file
> Yes, unless the free space is such that you can't create a file that 
> big. If you watch while it's running, you should see the file grow 
> and grow while the free space gets less and less. When the filesystem 
> is almost full, cat should report an error when it cannot write any 
> more, and a few seconds later you should have your free space back - 
> all overwritten with zeros.


Thanks for confirming. 


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