On 10.04.10 21:06, Andrey Kuzmin wrote:
No, until all snapshots referencing the file in question are removed.
Simplest way to understand snapshots is to consider them as
references. Any file-system object (say, file or block) is only
removed when its reference count drops to zero.
another thing to consider is the copy-on-write nature of ZFS, so
"overwriting" a file will actually not write to the same place on disk,
therefore it may be possible to retrieve supposedly deleted data if the
disk(s) in question were to be examined at a lower level (I seem to
remember that something is/was in the works to address this, can't recall
any detail though - I think Darren Moffat was involved).
Michael
Regards,
Andrey
On Sat, Apr 10, 2010 at 10:20 PM, Roy Sigurd Karlsbakk
<r...@karlsbakk.net> wrote:
Hi all
Is it possible to securely delete a file from a zfs dataset/zpool once it's been
snapshotted, meaning "delete (and perhaps overwrite) all copies of this file"?
Best regards
roy
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