zfs discuss - Jan 2007 - Re: [osol-discuss] Possibility to change GUID zfs pool at import

Hello Nico,

Friday, January 19, 2007, 7:53:06 PM, you wrote:

NVdM> Hi,

NVdM> Looking if someone already found a solution, or workaround, to change
the GUID of a zfs pool.

NVdM> Explain me some more in depth, by use of tools like ShadowImage
NVdM> on storage Arrays like the Sun Storagetek 99xx (but also for SUN
NVdM> related storage Arrays or IBM, EMC and other storage vendors) we
NVdM> are able to create data volume snapshots controlled by the
NVdM> Storage Array. Know also that snapshot functionality is directly
NVdM> available into zfs, but a lot of customers don''t want to
change a current habit.

NVdM> Through this kind of Storrage Array snapshots, also the current
NVdM> used zfs pool guid is copied. If you try now to import these
NVdM> type of snapshots onto the same host, you receive a error
NVdM> because you try to import a already used guid. 

NVdM> A identical situation you have by disks under Symantec Storage
NVdM> Foundation (aka Veritas Volume Manager) control or even by
NVdM> Solaris Volume Manager or other LVM''s. But for these type of
NVdM> workflows there are existing workarounds who let you change a
NVdM> familiar "id", as the guid for zfs, setting before import.

NVdM> To my opinion to make zfs more successful into productive
NVdM> environments, it would be fine to include this change guid as a
NVdM> possible extra option at importing a zfs pool (when not already
existing or planned).

I agree - it would be useful.
I wanted to test it myself on Symmtrix boxes but due to lack of time
never have done it. Thanks for test.

I added zfs-discuss@ which is more appropriate.

-- 
Best regards,
 Robert                            mailto:rmilkowski at task.gda.pl
                                       http://milek.blogspot.com