I am dealing with a situation where a VM on an ESXi 4.1 host (standalone, no vcenter server) had data loss after making changes to it and the snapshot cannot be restored due to the above error. Initially a snapshot was taken, the virtual disks were increased in size and the guest OS paritions were resized. After that a third virtual disk was removed and the files including the base vmdk were removed from the datastore. This disk was present during the snapshot creation. At that point an attempt was made to revert the snapshot. I have taken a look at the vmsd file and it does mention all 3 disks. I attempted to remove the lines related to the removed disk but that made no difference. I have tried to boot to the vm with the vmdk created by the snapshot but the vpshere client gives an error that the "the parent virtual disk has been modified since the child was created".
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