Hello,
the name of the "container"-partition is extended-partition. Within the extended Partition you can create many logical partitions. You will need one logical partition to restore the backup of your data-partition and at least one paritition for linux. Be sure to look at the partition id of every partition, they are different for windows, linux and linux-swap. Depending on your RAM-size it will be a good decision to create a swap-partition as well, so you will create 3 logical parititions into the extended one.
Markus
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