Another approach is to make a new virtual disk and attach it as a mirror.
Once the silver is complete, detach and destroy the old virtual disk.
Normal procedures for bootable disks still apply.

This works because ZFS only silvers data.
 -- richard


On Jan 22, 2010, at 12:42 PM, Cindy Swearingen wrote:

> Hi John,
> 
> You might check with the virtualguru, Rudolf Kutina.
> 
> I haven't had a chance to test this, but he had documented a
> way to shrink a pool in VBox, described here:
> 
> http://defect.opensolaris.org/bz/show_bug.cgi?id=5993
> 
> Thanks,
> 
> Cindy
> 
> On 01/22/10 12:00, John Hoogerdijk wrote:
>> Is there a way to zero out unused blocks in a pool?  I'm looking for ways to 
>> shrink the size of an opensolaris virtualbox VM and
>> using the compact subcommand will remove zero'd sectors.
>> Thanks,
>> John Hoogerdijk
>> Sun Microsystems of Canada IMO
>> Network Computer NC Ltd.
>> 808 240 Graham Avenue
>> Winnipeg, Manitoba, R3C 0J7, Canada
>> Phone: 204.927.1932
>> Cell: 204.230.6720
>> Fax: 204.927.1939
>> Email: john.hoogerd...@sun.com
>> _______________________________________________
>> zfs-discuss mailing list
>> zfs-discuss@opensolaris.org
>> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
> _______________________________________________
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