Virtual machines provide a tremendous amount of flexibility for your infrastructure. Since they exist as a series of files, they can be cloned, copied, and moved fairly easily. They can be exported to another Hyper-V host if you need to migrate to a new datacenter. However, they also share some other attributes of files that are not so advantageous: they can be deleted accidentally, become corrupt, or be lost due to a hard drive malfunction. This is why a backup strategy for your virtual machines is very important and should be included in any virtualization design plan. This is just as crucial in the virtual world as it is in the physical world. This chapter will discuss some different strategies for backing up virtual machines.
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