Sounds like it might be a FAT23 partition on vmware server for windows? It gives you the option for 2gb splits for conversion to windows vmdk files, but its not a limitation.
Obviously if you're converting to ESX thats not a concern at all, even with the default block size the maximum is 256gb
Obviously if you're converting to ESX thats not a concern at all, even with the default block size the maximum is 256gb