A multi-purpose storage-system partition may include (1) a bottom having a keyhole fastener configured to (a) interlock with a keyhole opening of a removable drive-plane board having front storage-drive connectors and rear storage-drive connectors and (b) retain the removable drive-plane board within a storage-system chassis, (2) a front having front storage-drive contact points configured to (a) retain front carrierless storage drives within the storage-system chassis and (b) align the front carrierless storage drives with the front storage-drive connectors, (3) a rear having rear storage-drive contact points configured to (a) retain rear carrierless storage drives within the storage-system chassis and (b) align the rear carrierless storage drives with the rear storage-drive connectors, (4) and a side having a fastener-retaining member configured to engage a fastener that couples the multi-purpose storage-system partition to a side of the storage-system chassis. Various other systems and methods for partitioning a storage-system chassis are also disclosed.