Hi Wanda No quite sure at least in Vsphere 5 (maybe Vsphere 5.1) , I always check with the command: dsmc show VM all and the parameter : changeTracking: Off
About the first backup will take only the USED space , at least in my environment some machines works fine but some others backup the ALL space !!! Best Regards Robert -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Prather, Wanda Sent: Monday, July 08, 2013 3:47 PM To: [email protected] Subject: Re: [ADSM-L] Should CBT be enabled before using TSM for VE to save space? If your VM's were created in VSphere 5, CBT will be on by default. My understanding is that either way (starting with CBT on or off), you should only get USED space on the first backup. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Michael Roesch Sent: Monday, July 08, 2013 4:29 AM To: [email protected] Subject: [ADSM-L] Should CBT be enabled before using TSM for VE to save space? Hi there, I've read here http://www-01.ibm.com/support/docview.wss?uid=swg21608413 that TSM for VE is using "content-aware" backup, if CBT is enabled. It also says that TSM for VE will enable CBT after the first backup. So I'm wondering if enabling CBT before performing the first backup would make TSM for VE backup only the used blocks (i.e. used space) and hence would save space on the storage pool? Or would TSM for VE still backup the full VMDK, including possible lots of unused space inside it on the first backup? Regards, Michael
