It definitely works - I would guess it reads the actual allocation table of the filesystem and doesn't collapse areas of the vmdk that are marked as occupied by files.
Another thing I haven't seen mentioned yet is that there's a small but definite performance hit to having a thin-provisioned vmdk over a thick-provisioned one - the thin-provisioned drive will incur a hit because the hypervisor has to check for any additional use of the disk and then expand the vmdk to allow for that. ---- Jack Kramer Computer Systems Specialist University Relations, Michigan State University w: 517-884-1231 / c: 248-635-4955 On 1/26/11 2:04 PM, "Paul Hutchings" <[email protected]> wrote: >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-virtualiza >tion-vmware/vmware-esx-4-reclaiming-thin-provisioned-disk-unused-space.htm >l > >http://ben.neise.co.uk/index.php/2009/10/using-sdelete-to-maximise-the-amo >unt-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-th >in-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
