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

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

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.
--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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