Well, tie me to a sow's belly and roll me in the mud! This threw me for a loop trying to figure out how vsphere could know the difference, but then it hit me - it doesn't matter. A block of zeros is still a block of zeros no matter where it is used. All wmware needs to do is remember that a certain range of disk blocks are zeros, and it doesn't need to allocate space until those blocks are read.
-----Original Message----- From: Paul Hutchings [mailto:[email protected]] Sent: Wednesday, January 26, 2011 2:05 PM To: NT System Admin Issues Subject: RE: Moving VM's between vCenter clusters? It's a fair question and one to which I'm not going to claim I know the answer beyond "they must be special zeroes" http://www.virtualizationteam.com/virtualization-vmware/vsphere-virtualization-vmware/vmware-esx-4-reclaiming-thin-provisioned-disk-unused-space.html http://ben.neise.co.uk/index.php/2009/10/using-sdelete-to-maximise-the-amount-of-disk-space-reclaimed-during-conversion-to-thin-provisioned-disks/ http://communities.vmware.com/thread/226985 http://www.yellow-bricks.com/2009/07/31/storage-vmotion-and-moving-to-a-thin-provisioned-disk/ ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
