According to this: http://www-01.ibm.com/support/docview.wss?uid=swg21641914&myns=swgtiv&mynp=OCSS8TDQ&mync=E
TSM4VE backs up the whole disk. And that's been my experience. Steve STEPHEN STACKWICK | Senior Consultant | 301.518.6352 (m) | stephen.stackw...@icfi.com | icfi.com ICF INTERNATIONAL | 410 E. Pratt Street Suite 2214, Baltimore, MD 21202 | 410.539.1135 (o) > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf > Of Robert Ouzen > Sent: Monday, July 08, 2013 8:58 AM > To: ADSM-L@VM.MARIST.EDU > Subject: [ADSM-L] FW: [ADSM-L] Should CBT be enabled before using TSM for > VE to save space? > > 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:ADSM-L@VM.MARIST.EDU] On Behalf > Of Prather, Wanda > Sent: Monday, July 08, 2013 3:47 PM > To: ADSM-L@VM.MARIST.EDU > 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:ADSM-L@VM.MARIST.EDU] On Behalf > Of Michael Roesch > Sent: Monday, July 08, 2013 4:29 AM > To: ADSM-L@VM.MARIST.EDU > 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
