![]() Modified the title to indicate the cause of the problem: an exFAT-formatted drive. I have successfully run an earlier version of this VM (albeit over a year ago) from this same external drive and laptop, with very good performance, albeit on VMware Fusion 8.ĭoes anyone have any insight as to why I'm getting such delays since moving this VM to an external drive? The Blackmagic text reports write speeds of just under 300 MB/s and read speeds of over 420 MB/s on the external drive, which should be plenty fast to run this VM. I ran a speed test on the external SSD and am confident that the drive is performing normally. ![]() T12:46:24.707-07:00| vmx| I125: ide0:0: Command WRITE(10) took 2.119 seconds (ok)ĬPU utilization doesn't seem to be a factor as there is low CPU utilization on both the host and guest. One of the main issues of APFS is that Macs running older versions of macOS cannot access it. The main benefit of Mac OS Extended is reverse compatibility. T12:46:16.140-07:00| vmx| I125: ide0:0: Command READ(10) took 2.463 seconds (ok) Although APFS is much faster and more reliable, there are still a few reasons you may want to use Mac OS Extended. ![]() There is obviously something going on with the virtualized hard disk on the external drive as I am now seeing constant entries like the following in my vmware.log every few seconds: The VM performed superbly from the MacBook's internal SSD prior to moving it to the external. The optimal formats for MacOS is APFS or Mac OS Extended Journaled. I just recently moved my VM from my MacBook Pro (15" Mid-2015, 16 GB of RAM VMware Fusion pid=20152 version=8.5.3 build=build-4696910) to an external Samsung 850 Pro SSD in a USB 3.0 enclosure and the VM (Windows 2012 Server) completely locks up with a spinning beach ball for a few seconds at a time. ExFat has limitations on the amount of information that can be read and written at a time, which will cause serious performance issues if using a drive formatted to ExFat as a result.
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