On Mon, November 2, 2009 20:23, Marion Hakanson wrote:

> You'll need to give the same "dd" treatment to the end of the disk as
> well;
> ZFS puts copies of its labels at the beginning and at the end.

Does anybody else see this as rather troubling?  Obviously it's dangerous
to get in the habit of doing this as a routine operation, which to read
advice here is how people are thinking of it.

It seems to me that something in ZFS's protective procedures is missing or
astray or over-active -- being protective is good, but there needs to be a
way to re-use a disk that's been used before, too.  And frequently people
are at a loss to even understand what the possible conflict might be.

Maybe a doubling of the -f option should give as full an explanation as
possible of what the evidence shows as previous use, and then let you
override it if you really really insist?  Or some other option?  Or an
entirely separate utility (or script)?

What I basically want, I think, is a standard way to get an explanation of
exactly what ZFS thinks the conflict in my new proposed use of a disk
might be -- and then a standard and as-safe-as-possible way to tell it to
go ahead and use the disk.

-- 
David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/
Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/
Photos: http://dd-b.net/photography/gallery/
Dragaera: http://dragaera.info

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