On Thu, Aug 31, 2006 at 09:54:25AM -0700, Matthew Ahrens wrote:
> Theo Bongers wrote:
> >Please can anyone tell me how to handle with a LUN that is expanded (on a 
> >RAID array or SAN storage)? and grow the filesystem without data-loss?
> >How does ZFS looks at the volume. In other words how can I grow the 
> >filesystem after LUN expansion.
> >Do I need to format/type/autoconfigre/label on the specific device?
> 
> I believe that if you have given ZFS the whole disk, then it will 
> automatically detect that the LUN has grown when it opens the device. 
> You can cause this to happen by rebooting the machine, or running 'zpool 
> export <poolname>; zpool import <poolname>'.

I think a 'zpool online <device>' should also work, since it triggers a
vdev_reopen().  But this requires that the underlying driver correctly
detects the LUN expansion and reflects this in the ldi_get_size() call.
I'm not sure if all drivers properly handle this case.

- Eric

--
Eric Schrock, Solaris Kernel Development       http://blogs.sun.com/eschrock
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