Workstation 10 and SSD awareness? |VMware Communities

There are three types of fragmentation relevant to VMs, which I’ve outlined in an answer on superuser.


The message being shown here is about the second type (fragmentation of the .vmdk file itself).  This means that a sparse .vmdk file is grown out of order, and if the guest later tries to read contiguous chunks from that .vmdk, Workstation can need to read from many different parts of the file.  Consequently, Workstation could be issuing many, many more I/O requests than it would if the .vmdk were defragmented.


If you don’t use a sparse .vmdk (and don’t use snapshots), then this won’t be a problem.

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