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When experiencing this you may see issues with partitions showing up in Explorer with a drive letter and when clicked on you will be asked by the OS to format the partition.
Other scenarios would involve viewing disk management and seeing the partition show up either without a driver letter assigned or as unallocated space.
The partitioning process requires shrinking of disk space by 1GB in order to form a Dell Support partition to hold the SupportAssist OS Recovery rescue operating system. The partitioning process can be lengthy with either slow performing spinning drives or large amount of data. Since this process can be lengthy it may seem as if it has failed, do not stop or abandon the process.
When termination of the process happens before it is completed the partitioning software may not have committed its changes to the partition table. This will result in the above symptoms.
Testing conducted by the SupportAssist OS Recovery has shown that the repair flow in SupportAssist OS Recovery can be used to correct the partitioning table in most cases.
Follow these steps to make a rescue USB key: