zfs discuss - Jun 2010 - Detaching a clone from a snapshot

Hello,

Is it possible to detach a clone from its snapshot (and copy all its data
physically)? I ran into an obscure situation where ''zfs
promote'' does not help.

Snapshot S has clones C1 and C2, both of which are boot environments. S has a
data error that cannot be corrected. The error affects *one* crash dump file, so
it''s obviously benign. (The system crashed when a crash dump was being
transferred from the dump device to /var/crash and this happened more than once.
This is a nightly + onu system, so accidents might happen.)

If I understand it well, the original dependency graph looks like this

	C1 -> S <- C2,

and I can only achieve one the following with ''zfs promote'':

	C1 <- S <- C2
	C1 -> S -> C2

I can''t get rid of S (and of the error message in zpool status) without
removing either C1 or C2. Is there a solution other than removing C1 or C2?

Andrej

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On Fri, Jun 25, 2010 at 10:28 PM, Andrej Podzimek <andrej at podzimek.org>
wrote:
> I can''t get rid of S (and of the error message in zpool status)
without
> removing either C1 or C2. Is there a solution other than removing C1 or C2?
You can use send|recv to create a new copy of one or both of the
clones. This should remove any dependancy on the original snaopshot.

-B

-- 
Brandon High : bhigh at freaks.com