zfs discuss - Aug 2008 - how to make two disks of one pool mirror both readable separately.

there are two disks in one ZFS pool used as mirror. So we all know that there
are the same date on the two disks. I want to know, how can migrate them into
two separate pools, so I can later read  & write them separately.( just as
in UFS mirror, we can mount each separately).

thanks.
 
 
This message posted from opensolaris.org

>>>>> "np" == Neal Pollack <Neal.Pollack at
Sun.COM> writes:
>>>>> "wj" == wan jm <wan_jm at 126.com> writes:
    np> Yes, it''s too easy to administer.  This makes it rough to
    np> charge a lot as a sysadmin.

yeah, sure, until you get a simple question like this:

    wj> there are two disks in one ZFS pool used as mirror. So we all
    wj> know that there are the same date on the two disks. I want to
    wj> know, how can migrate them into two separate pools, so I can
    wj> later read & write them separately.( just as in UFS mirror

and then you will need to pay someone a lot to set new GUID''s, as
discussed earlier for LUN cloning done by storage hardware.  

  http://www.opensolaris.org/jive/thread.jspa?threadID=65413&tstart=165

If you''ve detached one side of your mirror because you didn''t
want to
reboot, (1) it''ll only work for a single-vdev pool, and (2)
you''ll
need the magic beans in this thread:

  http://opensolaris.org/jive/thread.jspa?threadID=58780

and obviously I''ve never done it myself.  I''m just repeating
what I
read.

Of course you could just say, ``you can''t do that.'''' 
but that
solution would also work for UFS, also without the expensive
administrator.

I think at least for a few more years administrator salary deflation
is not a ZFS downside.
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