In case anyone else runs into this on ESXi 6.5, it has to do with a bad version of the AHCI driver. See here for fix as it worked for me. I'm not transferring to local datastore at ~500mbps. ...
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In case anyone else runs into this on ESXi 6.5, it has to do with a bad version of the AHCI driver. See here for fix as it worked for me. I'm not transferring to local datastore at ~500mbps. NXHut - IT and Windows - News: Fix slow disk performance (vmw_ahci driver) in ESXi 6.5