Yes, changing the disk to Independent (Persistent): http://searchvmware.techtarget.com/tip/Deleting-virtual-machine-snapshots-without-wasting-disk-space
Excluding virtual disks from using snapshots
If you have a VM with more than one disk and you wish to exclude a disk from being included in a snapshot, you must edit the VM's settings by changing the disk mode to Independent (make sure you select Persistent). The independent setting provides you the means to control how each disk functions independently, there is no difference to the disk file or structure. Once a disk is Independent it will not be included in any snapshots
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Diego Oliveira
LinkedIn: http://www.linkedin.com/in/dcodiego