Published at LXer:

Back in the good old physical server days, you bought a server system, added disks to it and, after a time, when you came close to filling those disks, either you added more disks or replaced them with larger ones. Times have changed in the virtual world. You can still provision a static disk (Thick provisioning), which is typically much too large for the workload and any reasonable amount of growth. But, you do it to prevent that middle-of-the-night ‘disk is full’ call. With thin provisioning, you don’t have to worry about that call anymore. Or, do you?

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