![]() ![]() My Windows 10 machine is the only one on my internal drive, but the others are located on the WD Thunderbolt Drive and they boot and perform perfectly well I have no complaints. FreeBSD and Win10 run all the time, the others only when I am doing something specific. ![]() On my iMac, I run several VirtualBox VMs (Windows 7, Win10, Server 2012, and FreeBSD). Running a VM off of USB isn't advisable unless you have no other options it will be painfully slow as other have already answered. I really recommend making sure you get a Thunderbolt or USB 3.0 drive. Whatever you chose, make sure you're getting a fast performance unit, since speed is very important for VMs. Keep in mind the bottleneck here is the actual read/write operations on the drive, since the USB/Thunderbolt bandwidth allows for much greater speeds. This makes a huge difference when running VMs. But it will only be half as fast as a good external SSD drive and 1/3 as fast as your internal drive. To put this into perspective, a top notch usb drive should perform nearly as well as an old hard disk drive, so it's definitely viable. Some numbers: A decent internal SSD will have a speed (sequential read/write) of around 500 MB/s while a fast external SSD will do around 300 MB/s, and a top notch USB 3.0 drive will be around 140 MB/s (a lot USB 3.0 drives are bellow 20 MB/s) - Source: SSD Benchmarks, USB Benchmarks ![]() I use VM for running Project and Visio on my mac (never from USB though), and it made a huge difference when I switched to SSD. Running the VM from a USB drive is definitely possible, but far from optimal. ![]()
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