[parted-devel] Deleting loop partition clears XFS signatures

[Phillip Susi]

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On 2/20/2015 11:19 AM, Brian C. Lane wrote:
> What do you expect to happen though? You've explicitly told parted
> to remove the 'partition' and that's what's happened. The fact that
> ext4 survives is more of an accident than anything else. I also
> don't really see the utility of trying to use parted like this --
> just make a real disk label and use that.

I was trying to preserve as much of the existing behavior as I could
when I made those changes.  That meant allowing you to do the
following things:

1)  Create a loop label with an empty partition
2)  Create a loop label with no partition
3)  Create a loop label with an empty partition, and then format a
filesystem there, and still have the disk show up as a loop label with
one partition containing that filesystem.

You asked what do you expect to happen, and what I actually expect to
when you delete the partition is for the filesystem to be deleted, so
the behavior your are seeing now with xfs is already correct.  That
isn't how parted used to work though, so I tried to preserve the
ability to delete the partition without deleting the filesystem and
that does work... as long as the fs doesn't use sector zero.

In other words, for those filesystems that use sector zero, don't
delete the partition.


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