I think you just coined a brilliant new technical term. We should totally start using it.
Steerage: n. A computer storage pool with more limited characteristics than the device's primary storage, commonly with inferior throughput performance and an inability to store a boot partition or executable software.
This is probably an intentional allusion by ergo98. On ships, "steerage" is the cheapest possible accommodation, which provides a stark contrast to "first-class."
Steerage: n. A computer storage pool with more limited characteristics than the device's primary storage, commonly with inferior throughput performance and an inability to store a boot partition or executable software.