If you are using a pure RAM drive then there is no automatic writing of the contents to a disk image from scripting (the graphical user interface does prompt the user for this however). The exception to this is when you are dealing with a large number of really small disk reads and writes from a single thread (the IOPS4KQD1 result). Are directly using a modern SSD can actually be faster than a RAM drive (depending on settings). Volume based emulation is also faster than physical emulation.īut the point is that you aren't giving up much performance by using a disk image and not a RAM drive. Results aren't entirely accurate due to some background activity and single sample. Image backed drive (1GB, physical disk emulation, FAT32, image backed to WD 512GB NVMe SSD)Īnd for comparison here are the speeds of the WD 512GB NVMe SSD Pure ram drive (1GB, physical disk emulation, FAT32) I did a quick test on the speed difference. If you mount a disk that is backed by an image file, then the changes are written back to the image file automatically (with some caching).
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