I have literally dozens of VMs running a slew of OSes across multiple Macs under PD 4 & 5, many of which have been through numerous PD upgrade cycles, re-configurations, clonings, crashes and forced shutdowns over the years. There are a number of files crawling around in some of these VMs whose purpose is unclear, and I don't doubt that at least some of them are of no value at all, wasting filesystem space. Worse, VM cloning seems to reproduce them into the new VM, and I'm sure the accumulation is taking up a fair amount of backup space. So, in an effort to clean house a bit, I'd like to find out what purpose, if any, the following file types serve and whether they can be removed: <somename>.hdd - an active disk image appears to be made up of the actual storage file(s), diskname...UUID.hds and a zero-byte file diskname.hdd. Are these zero-byte files, which I assume to be markers, of any value when there are no .hds files associated with them and their basename is not referenced from any DiskDescriptor.xml or config.pvs file? <parallels-file-name>.drh - so far I've seen these as peers of .pvm bundles and .hdd markers, and can find no reference to what they are. Where do they come from and what do they do? {uuid}.mem - I presume these are memory images, but should they be around when a VM has been shut down? I never turn on automatic snapshots, rarely perform manual snapshots, and don't normally suspend VMs - they're either running or shut down. These are serious space hogs, especially since they get copied when a [fully shut down] VM gets cloned. Can they be safely deleted? Those are all I run across at the moment, but I haven't searched everywhere - if there are other cruft-like files I can keep an eye out for I'd like to know about them, too. Thanks, - Ted
