Just a quick note today, more of a reference than anything else. I had the requirement recently to convert a load of VMs that had thin VMDKs to thick provisioned, however the client was not licensed for live Storage vMotion. In an effort to minimise downtime I decided the best thing to do was use […]
I have come across a number of environments where mystery “snapshot” files exist – they are not seen in snapshot manager, running a consolidation them doesn’t help, creating a snapshot (with memory, or guest OS quiescing) then running “Delete All” doesn’t resolve it, but some applications still think a snapshot is there. To take care […]
VMWare, as of writing, has a nasty bug that means your backups that run utilising CBT (hint: if you have basically any enterprise backup product worth its salt, it’s got CBT enabled) it loses track of the changed blocks when the VMDK reaches any Power 2 value of 128GB (128, 256, 512, 1024, etc.) which […]
Some things should be simple, shrinking a thin provisioned virtual disk should be one of them, it’s not. N.B. This will just reduce the VMDK’s usage on the VMFS datastore NOT resize the “provisioned size” of a thin disk. To shrink a VMDK we can use an ESX command line tool “vmkfstools”, but first you […]
I have had the need recently to expand a LUN on a Dell MD3000i SAN to above 2TB that is presented to VMWare ESX 5.1 hosts. There are a few caveats here: Why not follow @mylesagray on Twitter for more like this!